Coaching checked
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Transcript of Coaching checked
V-belts operate efficiently at speed of about (fpm):
A. 4400B. 4200C. 3600D. 4500
Poison's ratio is the ratio of:
A. shear strain to compressive strainB. elastic limit to compressive strainC. lateral strain to longitudinal strainD. elastic limit to proportional limit
Cold working of steel plates make the metal:
A. harderB. tougherC. more ductileD. more malleable
Manganese steel standard designation, SAE _____
A. 10XXB. 13XXC. 11XXD. 8XXX
The best materials for break drum is:
A. aluminumB. steel materialC. wrought ironD. cast iron
Plain carbon steel standard designation, SAE _____
A. 6XXXB. 14XXXC. 4XXXD. 10XX
Molybdenum-chromium-nickel steel designation:
A. SAE 48XXB. SAE 43XXC. SAE 56XXD. SAE 46XX
The rigidity of polymer can be increased by:
A. normalizingB. crystallizationC. furnace meltingD. shot peening
Stresses that are independent of loads is called:
A. working stressB. simple stressC. combined stressD. residual stress
Chromium steel standard designation, SAE:
A. 92XXB. 5XXXC. 3XXXD. 11XX
Ability to resist deformation under stress:
A. plasticityB. stiffnessC. toughnessD. all of these
A lathe machine threading mechanism:
A. spindle gearB. reverse gear and leverC. change stud gearD. all of these
Normal stress relieving temperature for cast steel:
A. 200 to 350 degrees FB. 400 to 500 degrees FC. 300 to 400 degrees FD. 450 to 550 degrees F
The three moment of equation may be used to analyze:
A. tapered columnB. composite beamC. continuous beamD. axially and loaded beam
The ability of a metal to be deformed considerably without rupture is called:
A. plasticityB. ductilityC. malleabilityD. all of these
One of the following materials is not mentioned for wire rope pulley/sheave applications.
A. plasticB. ironC. paperD. copper alloy
In greater quantity, this element is harmful to the molten ferrous metal.
A. siliconB. aluminumC. oxidesD. sulfur
Some experiments made at Cornell University showed that experience mechanic could break a _____ bolt due to nut tightening.
A. 3/8 inchB. 5/8 inchC. 1/2 inchD. 7/16 inch
The arc of action to circular pitch or length of action to base pitch.
A. approach ratioB. contact ratioC. arc of actionD. arc of approach
Which of the following product of combustion that has a property of resilience?
A. rubberB. greaseC. graphite powerD. graphite electrode
The brittleness in steel at elevated temperature is:
A. hard drawnB. red shortnessC. cold lapD. residual stresses
Common defects encountered in the foundry shop steel casting operating and also in welding practices.
A. cracksB. cold shotC. parting lineD. blow/pin holes
The minimum recommended worm pitch diameter is 1/4 in. and the maximum is _____ in.
A. 1 3/4 inB. 2 3/4 inC. 3 inD. 2 in
To prevent engine vibration to affect the surrounding area, it is a standard practice to isolate the engine and its foundation by at least _______ mm.
A. 20B. 30C. 25D. 36
The number of protons in the nucleus of an atom of the number of electrons in the orbit of an atom:
A. atomic volumeB. atomic numberC. atomic weightD. atomic mass
What amount of air is required in a low bypass factor?
A. greaterB. indeterminateC. lesserD. does not change
What keeps the moisture from passing through the system?
A. trapB. aeratorC. dehydratorD. humidifier
A theoretical body which when heated to incandescence would emit a continuous light-ray spectrum:
A. black body B. black body radiationC. blue bodyD. white body
Ignition of the air fuel mixture in the intake of the exhaust manifold:
A. backlashB. backfireC. exhaust pressureD. back pressure
Heat transfer due to heat differential: ???
A. radiationB. conductionC. convectionD. nuclear
Is the property of lubricant that will start burning:
A. pour pointB. solid pointC. fire pointD. flash point
In radiation, the heat transfer depends on:
A. temperatureB. heat raysC. heat flow cold to hotD. humidity
The main cause of air pollution as a result of burning fuel oil is:
A. sulfur dioxideB. hydrogen dioxideC. silicon dioxideD. nitrogen dioxide
Number of molecules in a mole of any substance is a constant called:
A. Rankine cycleB. Otto cycleC. Avogadro’s numberD. Thompson constant
What is an apparatus used in the analysis of combustible gases?
A. calorimeter differentialB. calorimeter gasC. calorimeterD. Calorimetry
A device for measuring the velocity of wind:
A. aneroid barometerB. anemometerC. anemoscopeD. anemograph
Which is used as a moderator in certain types of nuclear reactors?
A. vaporB. heavy waterC. hot waterD. cold water
What is the force required to accelerate a mass of 1 gram at a rate of 1 cm/sec/sec?
A. dyneB. poundalC. slugD. kg force
Foundations are preferably built of concrete in the proportion of what measures of Portland cement: san: crushed stones?
A. 1:2:5B. 2:4:6C. 2:3:4D. 1:2:4
The color of lubricating oil indicates:
A. does not indicated contaminationB. does not indicates qualitiesC. qualitiesD. viscosity
The components of a rotary pump: ???
A. gearsB. pistonC. impellerD. screw
What is the term used in to express the ratio of specific humidities, actual versus saturated?
A. relative humidityB. degree of saturationC. absolute humidityD. percent
In a diesel engine, what elements in the fuel that make to work of the lubricant more difficult? ???
A. water and ash contentB. high octane numberC. high cetane numberD. sulphur and asphaltene content
Enthalpy of an ideal gas is a function only of:
A. entropyB. internal energyC. temperatureD. pressure
Crankshaft of reciprocating type compressor is basically made of:
A. semi-steelB. aluminum alloyC. cast ironD. steel forging
Which does not belong to the group?
A. air injection systemB. mechanical injection systemC. time injection systemD. gas admission system
In a cooling tower, the water is cooled mainly by:
A. condensationB. convectionC. evaporationD. conduction
Air that controls the rate of combustion in the combustion chamber is known as:
A. secondary airB. excess airC. control airD. primary air
What is the color code of air pipelines?
A. light blueB. redC. brownD. violet
How many pounds of air are theoretically needed to burn one pound of diesel fuel oil?
A. 28B. 14C. 19D. 22
A major cause of air pollution resulting from the burning of fuel oils is:
A. nitrousB. hydrogenC. sulfur dioxideD. silicon
For reciprocating compression slip at positive displacement.
A. cd = 1B. cd > 1C. cd < 1D. cd = 0
For positive slip, the coefficient of discharge:???
A. increasesB. decreasesC. zeroD. constant
. __________ is the name applied to reciprocating circular motion as that of a pendulum.
A. intermittent motionB. reciprocating motionC. oscillationD. momentum
Not part and in fact should not be used in the steel melting process.
A. siliconB. zincC. aluminumD. coke
Iron based alloy containing 9-16% chromium.
A. stainless steelB. Mn Hadfield steelC. chrome-alloy steelD. high chrome steel
In a cutting tool the cutting end can also be generally called ____.
A. end cutting edgeB. back rakeC. side rakeD. nose
An example of rectilinear translation:
A. locomotive wheelsB. rack gearC. piston of an engineD. jack
All terms and abbreviations deal with wire rope arrangement except this ___ which deals with wire rope material strength.
A. MpsB. preformedC. IWRCD. lang lay
A tool not belonging to the group:
A. hermaphrodite caliperB. dividerC. double VEE blockD. trammel
Silicon manganese steel designation, SAE___.
A. 72xxB. 40xxC. 92xxD. 9xx
Permanent deformation or strain may occur without fracture:
A. malleabilityB. elasticityC. plasticityD. ductility
Most effective alloying element for reducing brittleness of steel at very low temperature:
A. manganeseB. molybdenumC. nickelD. silicon
For a high corrosion resistant stainless steel, what minimum chromium content is required?
A. 4.3%B. 8%C. 1.1%D. 5.8%
The phenomenon of continuous stretching under load even if the stress is less than the yield point:
A. creepB. elasticityC. ductilityD. plasticity
Killed steel is always associated with:
A. manganeseB. siliconC. phosphorusD. sulfur
Good stabilizer in stainless steel
A. columbiumB. titaniumC. tantalumD. all of these
It is considered semi-solid lubricant:
A. lube oilB. graphiteC. greaseD. all of these
Moment of inertia is also called:
A. weep strengthB. modulus of elasticityC. radius of gyrationD. none of these
The recommended lubricant for the chain drive operation.
A. moly slipB. SAE 4140C. Petroleum oilD. heavy grease
Maximum plant capacity in which a licensed ME is allowed to operate, tend or maintain.
A. 2000 kwB. 1000 kwC. 300 kwD. 3000 kw
Commonly used steel melter as deoxidizer because of its easy availability and cheap price.
A. siliconB. manganeseC. aluminumD. zinc
Internal stress exerted by the fibers to resist the action of outside force is called______.
A. tensile stressB. ultimate stressC. compressive stressD. shearing stress
Not part of the headstock.
A. back gearB. spindleC. anvilD. motor
What is the recommended cutting speed range for bronze in fpm?
A. 60/70B. 200/250C. 100/110D. 80/60