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These materials are hard and brittle, insulative to electricity and heat, and
very resistant to high tempertatures and harsh environments
ceramics
These materials have a large number of non-localized electrons, as an effect are very good conductors of electricity and heat. They are strong yet deformable,
and extensively used in structural applications
metals
What is the most common defects in crystals
line defects
Among the elements in the periodic table, Which group of elements are the
most electronegativehalogens
In the periodic table, the elements are arranged in vertical columns called
groups and numbered in roman numerals. These elements are called
congeners
Topaz. Quartz. Talc. Corondum. In the Moh's scale, which of the following is
the hardest mineralcorondum
Oldest engineering materials known for its good malleability property
copper
Materials composed of more than one material type and are designed to display a combination of the best characteristics
of each component material
composites
An elemental solid having a different crystal structure, usually due to the
allotrope
prevailing temperature and pressure
What do you call those forces which hold molecules together in crystals
Van der Waal forces
This metal is alloyed with steel to give it corrosion resistance properties, resulting
in stainless steelchromium
In order to prevent corrosion of metals in galvanized iron, what element is added
to steelzinc
This element is used in modern, super strong permanent magnets because of
their high coercivitiesneodymium
A kind of solid which is characterized as consisting of ordered three-dimensional arrays of structure motif is classified as
__ solids
crystalline
The heat treatment done in materials that improve its strength and machinability hardens the material resulting in loss of
ductility is known as
normalizing
It is a form of alpha-beta brass with about 60% copper, 40% zinc and a trace
of iron that is altered as an alloymuntz
A notation system in crystallography for planes and directions in crystal (Bravais)
latticesmiller index
A crystal imperfection involving a vacancy of pairs of ions of opposite
schottky imperfections
charges
The deterioration of an engineered material due to interaction with diverse
environments which lead to the degradation of its material properties
corrosion
It is the point at which there is an appreciable elongation of the material
without any corresponding increases of load
yield point
This component measures the pulling or pushing action perpendicular to the
sectionaxial forces
In engineering materials, in order to improve the ductility of nickel, __ is
neededmanganese
The ratio of the elastic modulus of the material to the density of the material is
the __ modulusspecific
The type of bond that occurs as a result of the formation of an electric dipole within certain atoms or molecules is
called
secondary bond
What crystalline structure has a coordination number of 12
face-centered cubic
What crystalline structure has a packing factor of 0.52
simple cubic
What is the atomic packing factor for FCC closed packed crystal structure
0.74
It is the interchange of an atom from a normal lattice position to an adjacent
vacant latticevacant diffusion
What gives the average ratio of stress to strain of the material operating in the non-linear region of the stress-strain
diagram
secant modulus
What is the theoretical maximum value of the Poission's ratio of any given
material subjected to a uniform triaxial stress
1/2
Ordinary steel heated at high temperature of 1130 C that has 1.7
carbon as one of its constituentaustenite
Group of dielectric materials that exhibits spontaneous polarization in the
absence of an electric fieldferroelectric
What is the ferroelectric Curie temperature of Barium Titanate
120 Celsius
A type of steel that contains more than 0.83% carbon
hypereutectoid steel
Stainless steels are iron-based alloys containing at least 12% __
chromium
Aluminum is how many percent by weight of the earth's crust
8
What type of bond exists in diamond covalent
A method in determining the hardness of a material that uses very small diamond
indented into surface features using microscope on metallographic specimen
Vickers Pyramid Scale
Which of the following band gap energies will appear colored
betqween 1.8 to 3.1 eV
Materials that are utilized in transducer devices that convert electrical energy into mechanical strains or vice versa
piezoelectric
What do you call a form of stress assisted corrosion, wherein vapor
bubbles form nd then burst on a surface causing damage to the underlying
materla
Cavitation
The class of ceramic capacitors used in couplings, filtering or bypass
applicationsclass II
A type of matrix composite where the fiber may be continuous throughout the length of the component, or less than a
micrometer in length, and present at almost any volume fraction, from 5 to
75%
metal matrix
The property of materials capable of withstanding cyclic load is normally
expressed infatigue strength
Which of the following statement about titanium is not correct
titanium offers negligible resistance
A mistake in engineering materials that involves atom, ion lattice site or
interstitial position is reffered to as __
point defect
defect
The size of an electron is very small, the diameter is however believed to be about
__ anstrom0.0001
A property of matter that is often used by chemist as an identification tag for a
substancedensity
In engineering materials, nickel silver, also known as German silver, is an alloy
ofcopper, nickel zinc
Which steel possesses the highest stiffness and compressive stress
cemented carbide
These are materials formed from repeating organic molecules
polymer
What are the substances having the same chemical formula but different structure
isomers
These are large molecule substances bonded to each other with weak bonding
forces and softens when heatedthermoplastics
The highest filled energy state at 0 K of an atom
fermi energy
It occurs when a member carries a load perpendicular to its long axis while being supported in a stable manner
bending stress
A type of corrosion that occurs when dissimilar metals exist at different
electrical potentials in the presence of an
galvanic corrosion
electrolyte
Corrosion that occurs in austinic stainless steels under tensile stress in the presence of oxygen, chloride ions, and
high temperature
chloride stress corrosion
This bond is similar to the molecular bond and occurs due to the ease with which hydrogen atoms are willing to
give up an electron to atoms of oxygen, fluorine, or nitrogen
hydrogen bond
Ferrite. Chromium. Nickel. Molybdenum. All of the following
materials possess high strength and low ductility and are BCC structure except
nickel
What are stresses included in vessels containing pressurized materials
pressure stresses
What is the ability of the material to resist deformation
toughness
A type of line defect consists of an extra row or plane of atomes in the crystal
structureedge dislocations
These materials have randomly oriented polycrystals - thus physical properties
are the same in all directionsisotropic
Which of the following is the smallest representation of an engineering material
unit cell
The amount of force required to cause a unit deformation (displacement) often
stiffness
called the spring constant is the
The thermal stress in a bar that is allowed to expand freely when heated to
higher temperature iszero
When applied normal and shear stresses are resolved in such a manner that the shear stresses vanish (go to zero), the
resulting normal stresses are called the
principal stresses
What is the material stress for brittle materials, in the calculation of allowable
stress from the formulaultimate strength
Full Annealing. Normalizing. Tempering. Quenching. In the
manufacture of steel, all of the following are processes to relieve internal stresses,
refine grain size, and soften material (i.e., improve machinability) except
quenching
All of the following are crystalline point defects except
screw dislocations
The quantity needed to close the circuit around a crystalline dislocation is called
Burger's vector
All of the following are typical crystalline defects except
mass defects
A ductile material is one that can be stretched, formed, or drawn to a
significant degree before fracture. A metal that exhibits a percent elongation
greater than __% is considered to be ductile
5
It refers to the arrangement of the grains in metal, with a grain having a particular
structuregrain structure
Is the property or ability of a metal to exist in two or more crystalline forms
depending upon temperature composition
polymorphism
A solid solution where the atoms of the solute element are small enough to fit
into the spaces between the parent material atoms
interstitial solid solution
A phase of uranium material where it posseses a lattice structure of BCC and
expands equally in all directionsgamma phase
The description or type of lattice structure formed in metals such as
Beryllium is the __ structurehexagonal closed pack
The weakly repulsive force experienced in most non-metals and organic
compounds (e.g. bismuth, paraffin, and silver) when exposed to a magnetic field
is
diamagnetism
The unit of toughness is Joules/m3
A linear polymer that has all of the side group on the same side of the chain
isotactic
The property of fluids by virtue of which they offer resistance to flow is known as
viscocity
What is the chief ore of tin cassiterite
What is the chief ore of zinc sphalerite
What is the mixture of two or more materials, at least one is a metal with
microstructure where secondary atoms are introduced as substitutional or
interstitial in a crystal lattice
alloy
What materials have permeability slightly greater than that of free space
paramagnetic
What is the process of forming continuous shapes by forcing a molten
polymer through a metal dieextrusion
Three-dimensional macroscopic effects are called
bulk defects
If the distorion disappears and the material remains distorted then this
material undergoes whatplastic strain
The property of a substance which remains constant if no heat enters or
leaves the system, while it does work or alters its volume, but which increases or
diminishes should a small amount of heat enter or leave
entropy
A homogenous mixture can be separated by all of the following methods except
filtration
The amount of energy needed to change a given mass of ice to water at constant
temperature is called the heat offusion
Chemical action may involve all of the
following except separation of the molecules in a mixture
The properties of solution include all of the following except that
dissolved particles will settle out upon stirring
It the delta H of a reaction is a negative quantity, the reaction is definitely
exothermic
The bromide ion is colorless
Which of the following is a compound water
The most active non-metallic element is Fluorine
When chlorine water and carbon tetrachloride are mixed with an
unknown, a violet layer is produced. The unknown is
Iodide
The two main parts of atom are the nucleus and energy levels
The lowest principal quantum number that an electron can have is
2
The sublevel that has only one orbital is identified by the letter
s
An orbital may never be occupied by 3 electrons
The number of orbitals in the second principal energy level, n=2, of an atom is
4
Oxygen. Citric Acid. Sodium Chlorate. Hydrochloric Acid. Which of the
Hydrochloric Acid
following is a binary compound
An example of a ternary compound is Potassium Chlorate
Name the element whose atom shows the greatest affinity for an additional
electronF
Name the most active non-metal in period 3
Cl
Which of the following elements is most likely to form covalent compounds
C
An atom which has the greatest ability to attract electron is
oxygen
What is the charge of a hydrogen atom 0
What is the most probably oxidation number for silicon in a compound
+4
Where in the periodic series do you find strong base formers
Left
The most abundant element in the earth's crust is
oxygen
The order of decreasing activity of halogens
F, Cl, Br, I
A light-sensitive substance used on photographic films has the formula
AgBr
The charring action of sulphuric acid is
due to its being a dehydrating agent
In a graphic representation of energy contents of reactants and resulting
products, which would have a higher energy content in an exothermic reaction
the reactants
The process of separating components of a mixture by making use of the
difference in their boiling points is calledfractional distillation
According to the activity chart of metals, which metal would react most
vigorously in a dilute acid solutionMagnesium
Graham's Law refers to Gaseous Diffusion
When a gas is collected over water, the pressure is corrected by
Subtracting the vapour pressure of water at that temperature
Distillation of water cannot remove volatile liquids like alcohol
The ratio in water of hydrogen to oxygen by mass is
1:8
Decomposing water by an electric current will give it a ratio of hydrogen to
oxygen by volume equal to2:1
If 10 g of ice melts at 0 deg Celsius, the total quantity of heat absorbed is
800 cal
The abnormally high boiling point of water in comparison to similar compounds is due primarly to
hydrogen bonding
A metallic oxide placed in water would most likely yield
base
A solution can be both saturated and diluted
A foam is an example of a gas dispersed in a liquid
When another crystal was added to a water solution of the same substance, the crystal seemed to remain unchanged. Its
particles where
exchanging places with others in the solution
A 10% solution of NaCl means that in 100g of solution there is
10 g NaCl
A synthesis reaction will occur spontaneously if the heat formation of
the product islarge and negative
Whenever you have equal volumes of gases at the same temperature and
pressure, the volume mustcontain equal number of particles
It is the transfer of energy from the more energetic particles of substance to the
adjacent less energetic ones as a result of interactions between the particles
conduction
It indicates that the rate of heat conduction in a direction is proportional
to the temperature gradient in that direction
Fourier's Law of Heat Conduction
Which of the following is the best conductor of heat
diamond
It is the mode of energy transfer between
a solid surface and the adjacent liquid or gas that is in motion, and it involves the combined effect conduction and fluid
motion
convection
In second law of thermodynamics, which of the following states that no heat
engine can have a thermal efficiency of 100% on as far as power plant operates, the working fluid must exchange heat with the environment as well as the
furnace
Kelvin-Plank
In second law of thermodynamics, which of the following states that no device can
transfer heat from cooler body to a warmer one without leaving an effect on
the surroundings
Clausius Statement
It is defined as the amount of light output in lumens per W of electricity
consumedlight efficacy
Which of the following processes are involved in carnot cycle
two adiabatic; two isothermal
States that the thermal efficiencies of all reversible heat engines operating
between the same two reservoirs are the same, and that no heat engine is more
efficient than a reversible one operating between the same two reservoirs
Carnot principle
For a metal atom to replace another kind of metallic ion in a solution, the metal
atom must be
higher on the electromotive chart than the metal in solution
One reason for a double-displacement reaction go to completion is that
a product is soluble
A salt derived from a strong base and a weak acid will undergo hydrolysis and
give a solution that will bebasic
The propery of being able to add enthalpies is based on the
First law of thermodynamics
Which of the following does not affect the rate of reaction
speed of the reactants
The addition of a catalyst to a reaction changes the activation energy
An increase in concentrationis related to the number of collisions
directly
At the beginning of a reaction, the reaction rate for the reactants is
largest, then decreasing
The concentrations in an expression of the equilibrium constant are given in
mol/L
The pH concentration of a solution that has a hydrogen ion concentration of 1 x
10^-4 mol/L is4
The pH concentration that has a hydroxide ion concentration of 1 x 10^-4
molL is
A small value of Keq + the equilibrium constant, indicates that
The concentration of the un-ionized molecules must be relatively large compared to the ion concentrations
In the Haber process for making ammonia, an increase in pressure favors
the forward reaction
A change in which of these conditions will change the K of an equilibrium
temperature
H2SO4 is a strong acid because it is an organic acid
According to the Bronsted Theory, an acid is
a proton donor
A buffer solution __ resists changes in pH
The point at which a titration is complete is called the
endpoint
The first and simplest alkane is Methane
Pierre and Marie Curie discovered Radium
Which of the following when dissolved in water and placed in the conductivity apparatus will cause the light to glow
table salt
The lead in a lead pencil is Graphite and clay
A decolorizer used in sugar refining is bone black
An important ore of iron is Hematite
The emission of beta particle results in a new element with the atomic number
increased by 1
A process where heat is releaseed to the surroundings
exothermic process
The total energy of the system. It contains the translational, rotational, vibrational, electronic, and nuclear
energies and the energies due to intermolecular interactions. Its absolute value is unknown; its change is defined by the first law of thermodynamics. It is
a state function and an extensive quantity
Internal Energy
A property that is determined by the state of the system. The change in the state function is path independent and defined by the properties in the initial
and final state only
state function
The law states that the quantity of the substance entering and leaving the
system is equal to the substance leaving the system
law of conservation of mass
States that if system A is in thermal equilibrium with system B, and system B is in thermal equilibrium with system
C, then system C is also in thermal equilibrium with system A
Zeroth law of thermodynamics
Energy is neither created nor destroyed, but is converted from one form to
anotherfirst law of thermodynamics
A process in which the system is always infinitesimally close to equilibrium.
Such a process can never be observed, it is only of theoretical interest
Reversible process
States that the change in entalphy of a reaction is the sum of the enthalpies of
reactions from which the reaction can be built
Hess' Law
States that in isolated systems the entropy increases in spontaneous process
2nd law of thermodynamics
It is impossible to convert heat completely into work
2nd law of thermodynamics
States that every substance has finit positive entropy except the entropy of
pure, perfect crystalline structure which is 0 at 0 K
3rd law of thermodynamics
Defined as A = U - TS, where U is internal energy, T is the thermodynamic
temperature and S is the entropyHelmholtz Energy
In a closed system at constant volume and temperature its energy decreases
during a spontaneous processHelmholtz Energy
In a closed system at constant pressure and temperature its energy decreases
during a spontaneous processGibbs Energy
The number of intensive variables that can be changed independently in the
system without disturbing the number of phases in equilibrium
degrees of freedom
A solution in which both the solvent and the solute obey Raoult's Law for any
compositionIdeal solution
It states that the vapour pressure in a solution is the sum of the vapour pressure of the pure component
multiplied by the mole fraction of that component
Raoult's law
The principle that the amount of gas dissolved under equilibrium in a volume
of liquid is in direct proportion to the pressure of the gas that contact the liquid
surface
Henry's Law
Is a compound which in its liquid form behaves as an electrically conduction
mediumElectrolyte
Properties independent of the nature of the compounds and depend on the
numbers of the solute particles onlyColligative properties
Movement of the solvent through a semipermeable membrane from a dilute
solution to a more concentrated oneOsmosis
The dissolution of a substance in two immiscible liquids
Partition
States that if an external stress is applied to a system at equilibrium, the system adjusts in such a way to decrease the
effect of the stress
Le Chatalier's principle
It is a constant of proportionality between the reaction rate and the
concentration of reactantsrate constant
Sum of all powers appearing in the empirical law
Reaction order
The sequence of elementary steps describing the time evolution of the
systemreaction mechanism
Reactions taking place at the same time parallel reaction
Which of the following equation of state has two constants
Vander Waals Equation
How many constants are there in Benedict Webb Rubin
8
How many constants are there in Strobridge Equation of state
16
A reaction step where the first chain carriers are formed
initiation step
A reaction in which the number of chain carriers increases
Branching step
A reaction in which the number of chain carriers is constant but the product is
consumedRetardation Step
A reaction in which the number of chain carriers decreases
termination step
Date of approval of RA 9292 April 17, 2004
There are __ Articles and __ sections in the RA 9292
8, 43
Any person who shall violate any provision of RA 9292 or any rules,
regulations, the Code of Ethics, and the Code of Technical Standards of Practice
is stated in section
35
The chairperson of the PRC shall include
in the Commission's program the implementation of RA 9292, the funding of which shall be included in the Annual
General Appropriations Act
Sec 40
The statement of policy of RA 9292 is __ of its implementing rules and
regulationsRule 1
What is otherwise known as the Electronic Commerce Act of the
PhilippinesRA 8792
It is a method of managing all the activities that affect the quality of goods
or services in order to prevent faultsQuality Assurance
This process can be used to measure achievement in Total Quality
Management system. Also it provides the essential control and measure
feedback loop necessary for quality improvement
Benchmarking
To aid the engineer manager about the needs of his peers, __ states that
employees have five basic needs which are as follows: physiological, security, social, esteem and self-actualization
Maslow's Needs Hierarchy Theory
What style of leadership should the engineer manager use when his unit is
manned by professionalsfree rein leadership
When is the effectivity date of the implementing rules and regulations of
RA 9292October 2, 2007
When there is an unexplained decline in
revenues and profits in the company, it is a sign that the engineer manager has __
inadequate control
What is the keystone of professional conduct
integrity
A type of bond where in the security is in sum's form of recognized commercial papers of a well established subsidiary
collateral bond
The ratio of quick assets to current liabilitie is known as the
acid-test ratio
The ratio of net income before taxes to the net sales is the
profit margin
What do you call the value of the stock as stated on the stock certificate
par value
The interest rate being referred to in economics is __ if the compounding of
the interest is annualeffective rate
The rate of an investment ratio as defined in economics is the ratio of the
net income to __owner's equity
The present worth of all depreciations over the economic life of the item is __
capital recovery
What do you call a market situation where there are many sellers and few
buyersoligopsony
A market situation where a unique product or service is available from a
single vendor and that vendor can
monopoly
prevent the entry of all others into the market
In handling unsolcited or unwanted commercial and promotional advertisements and surveys,
complainants who are not satisfied with the action of the Public Telecom Entities
or Content Providers may bring the matter to the NTC in writing within __ from receipt of the alleged text spam
3 months
This type of business organization can be set up without any formality. It exists
when there are a number of people involved who are part owners of the
business
Partnership
What is the mimimum fine for persons who violate a provision of RA 9292
Php 100,000
If an EE is to appear as an expert witness in court arbitration hearings, the
minimum fee chargeable to the client will not be less than __ attendance or
appearance
Php 1,000
The basic law providing for the regulations of radio station
communications in the Philippines and other purposes
RA 3846
Which of the following is not true for the qualifications of Board Members of
Electronics Engineering
Be a citizen and a resident of the Philippines for 5 consecutive years prior
to his appointment
As provided in ACT 3846, the construction of a radio station shall
begin only when
The NTC has already issued a Permit to construct
As provided in RA 7925, a VAS provider needs to secure a franchise if
it puts up its own network
In accordance with Radio Laws and Regulations, a base station in the Land Mobile Service must maintain entry in
its logbook, for a period of __ if emergency signal is received
2 years
It is the process of attracting potential employees to the company so that the selection process can be carried out
Recruitment
It is the name given to any activity undertaken by the organization with the express purpose of gaining information
about potential customer
Market Research
In accordance with the Philippine Electronic Code the maximum
accumulated permissible dose (MPD) of radiation associated with a radio
transmitter for a human being who is 54 years old is __ rems
180
Department Order No. 88 at the DPWTC also require the supervision of an ECE in
the operation and maintenance of any radio communications system composed
of __ more of any type of land radio stations
6
The maximum fine for any violation of RA 3846, an act of providing for the
regulation of radio and communications2 years
When was the IRR of RA 9292 approved by the PRC
August 31, 2007
The minimum carrier output power of transmitters that require supervision of
an Electronics Engineer is1 kW
In class B FM transmitter, the antenna height must be at least __ above the
average terrain500 ft
In NTC 03-11-02005, it states that any person or entity intending to register as
VoIP service provider has to post a performance bond of how much
5 Million
What is defined as a legally binding agreement or promise to exchange good
or servicescontract
What refers to a fundamental obligation under the contract which goes to the root
of the contractcondition
What refers to a statement or oath, often religious in nature, agreed by an
individual in ceremoniescreed
What is defined as a non-performance that results in the injured party receiving
something substantially less than or different from what the contract is
intended
Material Breach
What unit is used to measure the accumulative effects of radiation that can cause generic and somatic effects
Roentgens
What refers to the process of producing, forming or fabricating electronic
equipment and/or related components,
manufacturing
parts, devices and accessories
The promulgation of the syllabi/table of specification for the subjects in the board
licensure examination for electronics technician (ECT) was done in the city of
Manila on __
February 9, 2011
The promulgation of the syllabi/table of specification for the subject in the board
licensure examination for electronics technician (ECT) is also known as the Board of Electronics Engineering __
Board Resolution No. 1 Series of 2011
To qualify for the Electronics Technician examination, he/she must be a graduate of an Associate, Technician,
Trade or Vocational course in electronics or, subject to the evaluation
of the Board, such equivalent and/or related formal or non-formal course or
program from any school, college, university, or training insitution
recognized by the government or the State where it is established after
completing a resident course or program of not less than __
2 years
What costs represents money which has been spent or capital which has been
invested and which cannot be recovered due to certain reasons
sunk costs
NTC memorandum Circular requires Class B-1 to have a transmitter power of 500W and an effective radiated power
not lower than __ watts
1000
In Metro Manila, commercial load shall not exceed __ minutes for one hour
15
program
It is the value which is usually determined by a disintersted third party in order to establish a price that is fair to
both seller and buyer
fair value
The __ of a property is what the property is worth to the owner as an operating
unitutility value OR use value
It is used when products are made singly or in small batches. It happens when a
small number of products are processed at each storage before going on to the
next stage
job production
It involves a voluntary association of people, called members, who operate an enterprise collectively. The aim of this organization is not to make profit but to
give support to their members
Cooperative
__ depreciation is due to the lessening in the demand for the function which the
property was designed to renderfunctional
A provision placed in a contract which indicates the possible adjustment of
material and labor costs is calledescalatory clause
A mode of extinguishing obligations when a creditor abandons his right to
collect isforfeiture
The sum of direct labor cost incurred in the factory and the direct cost of material
are known as __ costsprime
What refers to a principal function of lower management which is to instill in
the workforce a comitment and enthusiasm for pursuing the goals of the
organization
motivating
What government agency was designated as the chairman of the Electronic Commerce Promotion
Council
DTI
RA 9292, Section 17 states that the result of the board examination shall be
released within __ days after the examination
15
It is the rational way to ensure that our limited time is always used effectively
time management
According to the code of professional ethics and conduct, each and every
engineer shall recognize and respect the supreme authority of the __ as expressed
in its laws and implemented by its agencies
state
In continuing Profession Education, how many points will be given to the resource speaker of a recognized
seminar/convention
5 CU per hour
In continuing Profession Education, how many additional points will be given upon completing a Master's degree
30 CU
How many CPE points will be given for a Master's Degree
1 CU per academic unit
In Continuing Profession Education, how many points will be given to a
panelist/reactor/ of a recognized program3 CU per hour
Which of the following is a chemical property of a slice of chocolate cake?
dietary calories
Which of the following is an extensive property of a bubble of air?
radius
Which of the following is an intensive property?
density
Which of the following is a physical property?
temperature
The specific volume of a substance is the volume per gram of substance. Specific
volume is an example of?a physical, intensive property
How many million tons of hydrogen are converted into helium every second at
the sun?700 million
What is the expression of the magnitude and direction of the lattice distortion
associated with dislocation?Burgers Vector
What theorem relates the line integral of a vector field around a simple closed curve C is in IR3 to an integral over surface S for w/c C is the boundary?
Stokes Theorem
A tornado warning siren on top of a tall pole radiates sound waves uniformly in
all directions. At a distance of 15.0 m the intensity of the sound is 0.250 W/m2. At
what distance from the siren is the
75
intensity 0.010 W/m2?
What is the speed of longitudinal waves in a lead rod?
1.2 x 103 m/s
Consider an idealized model with a bird (treated as a point source) emitting
constant sound power, with intensity inversely proportional to the square of
the distance from the bird. By how many
-6.0 dB
A stopped organ pipe is sounded near a guitar, causing one of the strings to
vibrate with large amplitude. We vary the tension of the string until we find the maximum amplitude. The string is 80% as long as the stopped pipe. If both the
pipe and the string vibrate at their fundamental frequency, calculate the
ratio of the wave speed on the string to the speed of sound in air.
0.40
The Concorde is flying at March 1.75 at an altitude of 8000m, where the speed of
sound is 320 m/s. How long after the plane passes directly overhead will you
hear the sonic boom?
20.5 sec
A glass flask with volume 200 cm3 is filled to the brim with mercury at 20°C. How much mercury overflows when the
temperature of the system is raised to 100°C? The coefficient of linear
expansion of the glass is 0.40 x 10-5 K-1
2.7 cm3
An aluminium cylinder 10 cm long, with a cross-sectional area of 20 cm2, is to be used as a spacer between two steel walls.
At 17.2°C it just slips in between the walls. When it warms to 22.3°C,
-8.6 x 106 Pa, -1.7 x 104 N
calculate the stress in the cylinder and the total force it exerts on each wall, assuming that the walls are perfectly rigid and a constant distance apart.
You are designing an electronic circuit element made of 23 mg of silicon. The
electric current through it adds energy at the rate of 7.4 mW = 7.4 x 10-3 J/s. If your design doesn’t allow any heat
transfer out of the element, at what rate does its temperature increase? The
specific heat of silicon is 705 J/kg-K.
0.46 K/s
A geologist working in the field drinks her morning coffee out of an aluminium cup. The cup has a mass of 0.120 kg and is initially at 20.0 °C when she pours in
3.00 kg of coffee initially at 70.0 °C. What is the final temperature after the
coffee and the cup attain thermal equilibrium? (Assume that coffee has the
same specific heat as water and that there is no heat exchange with the
surroundings.)
66.0 °C
In the Iron-Iron carbide diagram, the alloys containing solid phase with more
that 2% carbon are known as?cast iron
__ is use to nullify the effect harmful effect of sulphur in steel and is added
during deoxidation?Manganese
The intermetallic compound iron carbide is called?
cementite
__ raises the elastic limit and ultimate strength of the steel without reducing the
ductility?silicon
__ the combination of operation involving the heating of metal/alloy in solid state and cooling it to obtain the
desired properties?
heat treatment
The transformation product of austenite at low temperature is known as?
martensite
Any steel heated to a particular temperature above the critical
temperature results in the formation of?martensite
The principal source of information in the actual process of autenite under non-
equilibrium condition as a?TTT Diagram
__ involves heating to a predetermined temperature, holding at that temperature
and then cooling at a very slow rate?Annealing
The total electrical resistivity of a metal is equal to the sum of temperature-, impurity-, and cold work-dependent
contributions?
Matthiessen’s rule
A single quantum of vibrational or elastic energy?
phonon
The time-dependent permanent deformation that occurs under stress; for
most materials it is important only at elevated temperatures?
creep
In Engineering Economy, what do you call the method of repaying a debt, the principal and interest included, usually
by a series of equal payments at periodic
depreciation
intervals of time?
A type of bond where in the security is in sum’s form of recognized commercial papers of a well established subsidiary?
collateral bond
The ratio of quick assets to current liabilities is known as the?
acid test ratio
In handling unsolicited or unwanted commercial and promotional
advertisement and surveys, complainants who are not satisfied with the action of the Public Telecom Entities or Content Providers may bring the matter to the
NTC in writing within _____ from receipt of the alleged text spam?
3 months
In accordance with the International Telecommunications Union, the
Philippines as well as Japan, belong to what region as far as frequency
allocation and wage is concerned?
region 3
What is the minimum fine for persons who violate a provision of R.A. 9292?
P 100,000
The electronic designer will furnish how many sets of drawings, classifications
and other contract documents?5
In accordance with the Philippine Electronic Code the maximum
accumulated permissible dose (MPD) of radiation associated with a radio
transmitter for human being who is 54 years old is _________ rems?
180
It refers to the process of producing,
forming or fabricating electronic equipment and/or related components,
parts, devices and accessories?manufacturing
What law regulates the operation of CATV systems in the country?
E.O. 205
Find the amount at the end of two years and seven months if P1000 is invested at 8% compounded quarterly using simple
interest for anytime less than a year interest period?
P 1226.34
A steel tape 100m long is 2mm too short. The effective dimension of the
steel tape is 40mm, 20mm thickness, and 20mm width. How much tensile pull
should be applied at the edge of the steel tape to have 100m distance? The modulus of elasticity for steel is
200000MPa?
3200 N
What is the most common defects in crystals?
Line defects
Oldest engineering material known for its good malleability property?
Copper
A kind of solid which is characterized as consisting of ordered three dimensional arrays of structure motif, is classified as
__ solids.
crystalline
What crystalline structure has a packing factor of 0.52?
Body centric cubic
What gives the average ratio of stress to strain of the material operating in the non-linear region of the stress-strain
secant modulus
diagram?
A tank 8 m in diameter, 12 m high is completely filled with water. Determine
the minimum thickness of the tank plating if the stress is limited to 40 MPa?
11.72mm
Aluminum is how many % by weight of the earth’s crust?
8%
What do you call a form of stress assisted corrosion, wherein vapor
bubbles form and then burst on a surface causing damage to the underlying
material?
cavitation
What are stresses induced in vessels containing pressurized materials?
pressure stresses
The most active non-metallic element is? fluorine
When chlorine water and carbon tetrachloride are mixed with an
unknown, a violet layer is produced. The unknown is a(n)?
iodide
Name the element of the first 20 whose atom gives up an electron the most
readily?K
When a gas is collected over water, the pressure is corrected by?
Subtracting the vapour pressure of water at that temperature*
At 5 atm pressure and 70 degs C, how many moles are present in 1.5L of
O2 gas?0.267
Graham’s Law refers to? Gaseous diffusion
Enthalpy is an expression for the? Heat content
A process where heat is released to the surroundings.
Exothermic process
In a closed system at constant volume and temperature its energy decreases
during a spontaneous process?Helmholtz Energy
In a closed system at constant pressure and temperature its energy decreases
during a spontaneous processGibbs Energy
It states that the vapour pressure in a solution is the sum of the vapour pressure of the pure component
multiplied by the mole fraction of that component.
Raoults Law
The principle that the amount of gas dissolved under equilibrium in a volume
of liquid is in direct proportion to the pressure of the gas that contact the liquid
surface
Henrys Law
Sum of all powers appearing in the empirical law?
Reaction order
A reaction step that represents the reaction at the molecular level
Elementary step
Assumes that the concentration of a reaction intermediates is constant during
the main part of the reaction.Steady-state approximation
A reaction in which the number of chain carriers decreases
Termination step
Mr. Mangalindan would like to earn 7% of his income after payment of his taxes due. If the income of his investment will be taxed 42%, what is the minimum rate
of return, before payment, must his investment has to attain his goal?
12%
How much heat must be supplied to a pan of 500 g to increase the temperature from 20°C to 100°C if the pan is made up of aluminum? Specific heat capacity
of aluminum is 0.22 cal/g-°C.
8800 cal
A heat engine operates with a supplied heat of 65 kcal and exhausts 40 kcal.
How much work is done by the engine?104600 J
A charge A of +250 statcoulomb is placed in between 2 charges B of +50
statcoulomb and C of -300 statcoulomb. A is 5 cm from B and 10 cm from C.
What is the force on A?
1250 N
The amount of force required to cause a unit deformation (displacement) often
called the spring constant is the?stiffness
What is the material stress for brittle materials, in thecalculation of allowable
stress from the formula?ultimate strength
Determine the maximum torque that can be applied to a hollow circular steel shaft of 100-mm outside diameter and 70-mm
inside diameter without exceeding a shearing stress of 60 MPa or a twist of
5,403 N-m
0.5 deg/m. Use G=83 GPa.
A simple beam having a span of 6 m has a weight of 20kN/m. It carries a
concentrated load of 20kN at the left end and 40 kN at 2m from the right end of the beam. If it is supported at 2m from
the left end and at the right end, compute the reaction at the right end of the beam.
40 kN
A type of line defect consist of an extra row or plane of atoms in the crystal
structure?edge dislocations
Nuclear physicists commonly use particle accelerators to?
fabricate elements that don’t occur naturally
High levels of UV radiation, either short term or long term, are known or believed
to cause all the following except?ozone depletion
A diverging lens? can collimate converging rays of light
If a spaceship is slowing down, that is, losing speed in the forward direction, the
perceived force inside the ship is directed
toward the front
Defined as 1/π candle per square centimetre?
Lambert
Who developed a wave equation, the solution of which described the wave
amplitude of the matter waves as well as the allowed energy values the particle
can have?
Erwin Schrodinger
These are highly penetrating
electromagnetic radiation, not deflected by magnetic or electric fields, and
produce little ionization?gamma particles
How many molecules are present in 2.5 liters of gas at STP?
6.7 x 1022 molecules
Under which of the following conditions does the behavior of a real gas resemble
that of an ideal gas?
only at low densities when the molecules are relatively far apart
Consider two water drops at a temperature T. These drops are not
allowed to exchange energy with their environment. These two drops collide
and combine. How does the temperature of these drops change when they
combine?
increase
Which of the following quantities has the greatest Influence on the overall
efficiency of a conventional (Rankine cycle) electric generating station burning
fossil fuels?
steam temperature at the steam turbine inlet
The modulus of elasticity for a material refers to?
the ratio of stress over strain
What property of a metal describes the onset of plastic deformation in a tensile
test?yield strength
Which of the following is not a stage in color changing process in alchemy?
Kuntosis
Which of the following is the common name for battery acid
Sulfuric Acid
The element that was discovered between calcium and titanium
Scandium
The shorthand name for molybdenum is? Mo
500 years ago, Rajah Salayog deposited P0.01 with an interest rate of 5% per annum. Now the bank discovered that you are the only left in the clan and entitled to receive the money. How
much is it?
Php 393,618,232.3
It is a financial summary showing the relationship among assets, liabilities, and
ownership in the corporation on a specific date?
balance sheet
The promulgation of the syllabi/table of specification for the subjects in the board
licensure examination for electronics technician (ECT) was done in the city of
Manila on?
February 9, 2011
The promulgation of the syllabi/table of specification for the subjects in the board
licensure examination for electronics technician (ECT) is also known as the Board of Electronics Engineering __ ?
Board Resolution No. 1 Series of 2011
To qualify for the Electronics Technician examination, he/she must be a graduate of an Associate, Technician,
Trade or Vocational course in electronics or, subject to the evaluation
of the Board, such equivalent and/or related formal or non-formal course or
program from any school, college. university or training institution
recognized by the government or the State where it is established after
2 years
completing a resident course or program of not less than?
According to the syllabi for the Electronics Technician licensure
examination, which of the following is not classified under technical subjects?
Philippine Electrical Code
In Continuing Profession Education, how many additional points will be given upon completing a Master’s
degree?
30 CU
In Continuing Profession Education, how many points will be given to the
resource speaker of a recognized seminar/convention?
5 CU per hour
In Continuing Profession Education, sole authorship of book monograph with
more than 100 page will merit the author40 CU