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Lavender International NDT Ltd > NDT Shop Now Open! Unit 7, Penistone Station, Sheffield, S36 6HP, United Kingdom Tuesday, September 18, 2001 < Back Forward >
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Lavender International Online Assessments: General Familiarity: Module 5-1:
General Familiarity with Other NDT Methods (At Level 2)
Radiographic Testing
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. The latent image is a shadow of a specimen?
After development
Before development
Both of the above
Neither of the above
2. Frequency is measured in what?
Kilovoltage from x-ray tube
MA Current
Intensity
Cycles per second
3. Which of the following will reduce inherent unsharpness?
SFD
Source size
Both of the above
Neither of the above
4. Which of the following give an atom its atomic number (Z)?
Neutrons
Protons
Electrons
Photons
5. Small grain will give good what?
Definition
Contrast
Both definition and contrast
Faster film
6. Radiographic sensitivity is made mostly up of?
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Page 1 of 4Lavender International: General Assessments: Module 5-1
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-1.html
Lavender International NDT Ltd > NDT Shop Now Open! Unit 7, Penistone Station, Sheffield, S36 6HP, United Kingdom Tuesday, September 18, 2001 < Back Forward >
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Lavender International Online Assessments: General Familiarity: Module 5-2:
General Familiarity with Other NDT Methods (At Level 2)
Ultrasonic Testing
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. Which of the following is a reference reflector that is not dependent on beam angle?
A flat bottomed hole
A vee notch
A side drilled hole which is parallel to the plate surface and perpendicular to the sound path
A disc shaped laminar reflector
2. Where does beam divergence occur?
Near field
Far field
At the crystal
None of the above
3. On a scan display the dead zone refers to?
The distance contained within the near field
The area outside the beam spread
The distance covered by the front surface pulse width and recovery time
The area between the near field and far field
4. Which of the following modes of vibration exhibits the shortest wavelength at a given frequency and in a given material?
Longitudinal wave
Compression wave
Shear wave
Surface wave
5. Look at diagram one at the foot of the page which illustrates four waves. Wave A strikes the surface of the specimen and produces waves B, C and D. The incident angle is?
Angle A
Angle B
Angle C
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Page 1 of 4Lavender International: General Assessments: Module 5-2
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-2.html
Angle D
6. Diagram two at the foot of the page illustrates four waves. Wave A strikes the surface of the spcimen and produces waves B, C and D. The refraction angle is?
Angle A
Angle B
Angle C
Angle D
7. In which zone does the amplitude of an indication from a given discontinuity diminsh exponentially as the distance increases?
Far field zone
Near field zone
Dead zone
Fresnel zone
8. Rayleigh waves are influenced most by defects located?
One wavelength below the surface
Six wavelengths below the surface
Close to or on the surface
Three wavelengths below the surface
9. Of the following sound waves modes one has multiple or varying wave velocities?
Longitudinal waves
Shear waves
Transverse waves
Lamb waves
10. Transducers used in ultrasonic testing exhibit which of the following effects?
Ferromagnetic
Piezoelectric
Electromechanical
Hyperacoustic
11. Of an a-scan display what represents the intensity of the refelected beam?
Echo pulse width
Horizontal screen location
Signal brightness
Signal amplitude
12. A short burst of alternating energy is called?
A continuous wave
A peaked dc voltage
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Page 2 of 4Lavender International: General Assessments: Module 5-2
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-2.html
An ultrasonic wave
A pulse
13. Attenuation is a difficult quantity to measure accurately particularly in solid materials at the test frequencies normally used. The overall result observed includes other loss mechanisms which can include?
Beam spread
Couplant mismatch
Test piece geometry
All of the above
14. The simple experiment where a stick in a glass of water appears disjointed at the water ?
Reflection
Magnification
Refraction
Diffraction
15. The ratio of the velocity of sound in water compared to that for aluminium or steel is approxiamtely?
1:4
1:2
1:8
1:3
16. Which of the following cannot be considered as a coupling agent?
Greece
Water
Air
Glycerine
17. The speed with which ultrasonic waves travel through a material is known as its?
Velocity of sound energy
Pulse repetition rate of sound energy
Pulse recovery rate of sound energy
Ultrasonic response of sound energy
18. A testing technique in which the crystal or transducer is parallel to the surface and ultransonic waves enter the material being tested in a direction perpendicular to the test surface is?
Straight beam testing
Angle beam testing
Surface wave testing
None of the above
19. The total energy losses occuring in all materials is called?
Attenuation
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Page 3 of 4Lavender International: General Assessments: Module 5-2
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-2.html
Scatter
Surface wave testing
None of the above
20. Acoustic energy propagates in different modes. Which of the following represents a mode?
Longitudinal mode
Shear wave
Surface wave
All of the above
> Check Your Answers
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Diagram One for Question Five Diagram Two for Question Six
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Page 4 of 4Lavender International: General Assessments: Module 5-2
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-2.html
Here are the corrections:
1. A side drilled hole which is parallel to the plate surface and perpendicular to the sound path 2. Far field 3. The distance covered by the front surface pulse width and recovery time 4. Surface wave 5. Angle D 6. Angle A 7. Far field zone 8. Close to or on the surface 9. Lamb waves 10. Piezoelectric 11. Signal amplitude 12. A pulse 13. All of the above 14. Refraction 15. 1:4 16. Air 17. Velocity of sound energy 18. Straight beam testing 19. Attenuation 20. All of the above
Contrast
Definition
Density
Both contrast and definition
7. When isotopes are made artificially by nuclear fission they are bombarded with neutrons. This process is called?
Nuclear fusion
Atomic bonding
Neutron radiography
Activation
8. One curie equals?
37 x 10 -10
37 x 9 10
37 x 9 9
None of the above
9. X -rays intensity is determined by current (milliamps) applied to the object called?
Widow
Focal spot
Actual focal spot
Filament tube
10. High latitude will have a?
High contrast
Low contrast
Low definition
High definition
11. TLD stands for?
Total limited dosemeter
Thermo luminescent dosemeter
True limit doemeter
None of the above
12. The developer is a solution of what?
Acetone
Acid
Alkaline
Water
13. Always use lead screens above what KV?
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Page 2 of 4Lavender International: General Assessments: Module 5-1
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-1.html
100 KV
110 KV
120 KV
150 KV
14. When using x-rays or gamma rays which of the following is not correct?
They travel in straight lines and obey the inverse square law
They travel at the speed of light with constant amplitude
They effect photographic emissions
They have a low wavelength and low frequency
15. Coarse grain and wide latitude mean?
Very slow film
Slow film
Medium film
Fast film
16. Which of the following when in contact with ionising radiation produces visible fluroescence?
Calcium tungstate
Silver bromide
Zinc fluoride
Sodium carbonate
17. The focusing cup is part of which of the following?
Anode
Target
Cathode
Filament
18. Which of the following will affect subject contrast?
Film contrast
Development time
Radiation energy
All the above
19. How may geometric unsharpness be improved (reduced)?
Increase focal spot size
Increase object to film distance
Increase source to object distance
Used faster speed film
20. Which of the following is the more penetrative radiation?
Colbolt 60
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Page 3 of 4Lavender International: General Assessments: Module 5-1
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-1.html
Iridium 192
200 KV x ray set
350 KV x ray set
> Check Your Answers
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Lavender International, Unit 7, Penistone Station, Sheffield, S36 6HP , United Kingdom
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Page 4 of 4Lavender International: General Assessments: Module 5-1
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-1.html
Here are the corrections:
1. Before development 2. Cycles per second 3. Neither of the above 4. Protons 5. Both definition and contrast 6. Both contrast and definition 7. Activation 8. None of the above 9. Filament tube 10. Low contrast 11. Thermo luminescent dosemeter 12. Alkaline 13. 120 KV 14. They have a low wavelength and low frequency 15. Fast film 16. Calcium tungstate 17. Cathode 18. Radiation energy 19. Increase source to object distance 20. Colbolt 60
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Lavender International Online Assessments: General Familiarity: Module 5-4:
General Familiarity with Other NDT Methods (At Level 2)
Liquid Penetrant Testing
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. Which of the following is a detergent type remover?
Lipophilic emulsifier
Trichlorethylene
Hydrophilic remover
Water
2. Which of the following is the least sensitive developer?
Dry powder
Aqueous soluble
Aqueous suspendable
Non-aqueous wet
3. Non-aqueous wet developers are applied to the part surface by which of the following methods?
Spraying
Dipping
Flowing
All of the above
4. Penetrants which have an emulsifier already in them referred to as?
Post emulsifiable
Solvent removable
Water washable
Lipophilic penetrant
5. A good penetrant requires a surface tension which is?
High
Low
Fast
Slow
6. Dry powder developers shall be applied to a ??? surface?
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Page 1 of 4Lavender International: General Assessments: Module 5-4
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-4.html
Dry
Wet
Warm
Slightly moist
7. Which surface is not suitable for testing using the post emulsifiable method?
Smooth
Slightly warm
Rough
Finished machined
8. Which penetrant system is best suited when checking for wide shallow flaws?
Water washable
Post emulsifiable
Solvent removable
Leak through
9. Dual purpose penetrants are viewed under what light?
White light
Black light
White and black light
None of the above
10. Which method of penetrant inspection is best suited for testing in remote areas?
Fluorescent solvent removable
Visible solvent removable
Visible water washable
Fluorescent post emulsifiable
11. The mechanism which pulls a penetrant into a discontinuity is defined as?
Capillary action
Good surface tension
Low rentitivity
Good wettability
12. Which penetrant method is considered to be the most sensitive?
Visible solvent removable
Fluorescent water washable
Visible post emulsifiable
Fluorescent post emulsifiable
13. The emulsification time is calculated by which of the following methods?
Using half of the dwell time
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Page 2 of 4Lavender International: General Assessments: Module 5-4
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-4.html
Using a quarter of the dwell time
Trial and error
Emulsification should always be for two minutes
14. When using water washable fluroescent penetrant after the water wash stage the component should then be?
Dried
Viewed under black light
Developed
Emulsified
15. When is it possible to detect slightly sub-surface defects using penetrant testing?
Only if you are using fluroscent penetrants
When using post emulsifiable penetrants
It is not possible to detect slightly sub-surface defects using penetrant testing
When using dual sensitivity penetrants
16. Which of the following is a method of applying dry powder developer?
Electrostatic spray
Dipping
Dust storm cabinet
All of the above methods of application
17. Which of the following is a method of applying penetrant?
Spraying
Dipping
Brushing
All of the above are methods
18. What problem is overcome by using the post emulsifiable penetrant method?
Overwashing
Long dwell time
Short dwell times
Penetrant drying within faults
19. The time which the penetrant is allowed to soak on teh surface of a component is commonly referred to as the?
Development time
Emulsification time
Dwell time
Inspection time
20. If testing a high number of small components which of the following penetrant processes would be least suitable?
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Page 3 of 4Lavender International: General Assessments: Module 5-4
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-4.html
Water washable
Solvent removable
Post emulsifiable
Dual sensitivity
> Check Your Answers
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Lavender International, Unit 7, Penistone Station, Sheffield, S36 6HP , United Kingdom
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Page 4 of 4Lavender International: General Assessments: Module 5-4
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-4.html
Here are the corrections:
1. Hydrophilic remover 2. Dry powder 3. Spraying 4. Water washable 5. Low 6. Dry 7. Rough 8. Post emulsifiable 9. White and black light 10. Visible solvent removable 11. Capillary action 12. Fluorescent post emulsifiable 13. Trial and error 14. Viewed under black light 15. It is not possible to detect slightly sub-surface defects using penetrant testing 16. All of the above methods of application 17. All of the above are methods 18. Overwashing 19. Dwell time 20. Solvent removable
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Lavender International Online Assessments: General Familiarity: Module 5-5:
General Familiarity with Other NDT Methods (At Level 2)
Magnetic Particle Testing
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. The spacing between prods for the best sensitivity is?
1-2 inches / 25-50 mm
2-4 inches / 50-100 mm
6-8 inches / 150-200 mm
10-12 inches / 250-300 mm
2. The space around a magnet within which ferromagnetic materials are attracted to the magnetic is called?
A magnetic field
Permeability
A Hysteresis curve
A magnetic pole
3. Magnetic particle inspection is a means for detecting discontinuities at or near the surface in ??? materials?
Metallic
Nonconductive
Ceramic
Ferromagnetic
4. When a round steel bar is magnetised by passing alternating current through its length, flux density is?
Greatest along its centre line
Greatest at the surface
Uniform throughout its cross section
Greatest at the ends of the material
5. The strength of the magnetic field within a coil is determined by?
The current in the coil
The number of turns in the coil
The diameter of the coil
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Page 1 of 4Lavender International: General Assessments: Module 5-5
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-5.html
All of the above
6. A test object 10 inches - 25cm - long, and 2 inches - 5cm - in diameter, longitudinally magnetised in a 5 turn coil, requires a magnetising current of what amperage using AC current with a K factor of 22000?
4400 amps
880 amps
2200 amps
2400 amps
7. How much current would be required to circularly magnetise an article 10 inches - 25cm - long and 2 inches - 5cm - in diameter using 5.3 amps per mm diameter?
132.5 amps
397.5 amps
265 amps
None of the above
8. A surface defect produces an indication which is?
Sharp and distinct
Wide and indefinite
Usually nonrelevant
Usually transverse
9. When magnetic fields are applied in two or more directions at the same time the resultant magnetic field is known as?
A swinging field
A leakage field
An induced field
A vector field
10. Which of the following is the general procedure followed when demagnetising an article?
Reverse the field whilst reducing the magnetising force
Reverse the field whilst increasing the current
Keep the field constant whilst reducing the current
Keep the field constant whilst increasing the current
11. Magnetic particle indications are caused when magnetic particles are attracted at which of the following?
Flux leakage
Magnetic poles
Leakage fields
All of the above
12. The bulb and filter of a black light must be cleaned regularly because?
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Page 2 of 4Lavender International: General Assessments: Module 5-5
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-5.html
Cleanliness gives the lab a professional appearance
Dust and dirt permit the passage of infra red and white light
Dust and dirt reduce the passage of black light
None of the above
13. A residual magnetic field is always?
Stronger than the magnetic field producing it
Weaker than the magnetisiing field producing it
Equal to the magnetising field producing it
None of the above
14. Occasionally, indications are caused when magnetic particles are accumulated and held mechanically or by gravity in surface irregularities. These indications are not formed by leakage fields. This type of indication is called?
A non relevant indication
A spurious indication
Magnetic writing
A defect indication
15. When a magnetised article is touched by another piece of magnetised material, whatbtype of indication could be induced onto the first item?
True relevant
Magnetic writing
False indication
None of the above
16. Large, soft pads made of lead or copper braid are used as contact surfaces on head stocks to?
Increase the contact area and reduce the current density
Reduce the voltage to a safe level
Attract excess particles
To increase the current density in the part
17. Fine surface discontinuities are best detected by use of?
Dry magnetic particles with direct current magnetisation
Wet magnetic particles with alternating current magnetisation
Dry magnetic particles with half wave rectified current
Wet magnetic particles with hald wave rectified current
18. The most frequent cause for non relevant indications is?
Using the wrong type of magnetising current
Using excessive magnetising current
Using a small amount of magnetising current
Using a yoke instead of a permanent magnet
19. In magnetic particle testing, the most sensitive method of testing articles with low retentivity is
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Page 3 of 4Lavender International: General Assessments: Module 5-5
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-5.html
the ??? method?
Wet continuous
Dry continuous
Wet residual
Dry residual
20. The selection of the test method is primarily determined by the ??? of the test article?
Hardness
Configuration
Conductivity
Strength
> Check Your Answers
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Lavender International, Unit 7, Penistone Station, Sheffield, S36 6HP , United Kingdom
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All Content & Design is © Copyright 2000 Lavender International NDT Ltd
Page 4 of 4Lavender International: General Assessments: Module 5-5
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-5.html
Here are the corrections:
1. 6-8 inches / 150-200 mm 2. A magnetic field 3. Ferromagnetic 4. Greatest at the surface 5. All of the above 6. 880 amps 7. 265 amps 8. Sharp and distinct 9. A vector field 10. Reverse the field whilst reducing the magnetising force 11. All of the above 12. Dust and dirt reduce the passage of black light 13. Weaker than the magnetisiing field producing it 14. A non relevant indication 15. Magnetic writing 16. Increase the contact area and reduce the current density 17. Wet magnetic particles with alternating current magnetisation 18. Using excessive magnetising current 19. Wet continuous 20. Configuration
Lavender International NDT Ltd > NDT Shop Now Open! Unit 7, Penistone Station, Sheffield, S36 6HP, United Kingdom Tuesday, September 18, 2001 < Back Forward >
> Services Courses in MT,
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Lavender International Online Assessments: General Familiarity: Module 5-6:
General Familiarity with Other NDT Methods (At Level 2)
Leak Testing / Acoustic Emission
Questions 1 - 10 Reference: Metals Handbook Ninth Edition Pages 57 - 70 Questions 11 - 20 Reference: Metals Handbook Ninth Edition Volume 17 Pages 278 - 294
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. Passage of a fluid into, through, and out of a solid barrier having no holes large enough to permit more than a small fraction of the total leakage to pass through any one hole can be defined as?
Molecular flow
Permeation
Transitional flow
Viscous flow
2. A halogen rich refrigerent gas, detectable by a Halogen Diode Leak Detector as it passes through a leak is generally referred to as?
A sensing gas
A tracer gas
An ionizer gas
A detected gas
3. Materials that contain halogens are called?
Fluorines
Inert
Halides
Ozone
4. Which of the following is an advantage of all the techniques of teh bubble test method?
The results are quantitative in nature
Limited skill and training is required for personnel
Very high sensitivity is attainable
It is not satisfactory for detecting a gross leakage
5. The sensitivity limit of a production bubble leak test is?
10-5 Std cm3/s
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Page 1 of 4Lavender International: General Assessments: Module 5-6
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-6.html
10-6 Std cm3/s
10-7 Std cm3/s
None of the above
6. Mass spectrometers are ideally suited to the leak testing of?
Vacuum systems
Pipe lines
Large pressure vessels
Pumps
7. Which of the following leak testing methods is considered to be the most sensitive?
Mass spectrometer in a vacuum
Bubble test
Pressure test
Hydrostatic test
8. Which of the following NDT Methods can be used as a form of leak testing?
Acoustic Emission
Magnetic particle inspection
Penetrant inspection
Eddy current inspection
9. Which of the following is an advantage of the pressure change measurement test method?
Requires no special tracer gas
Can be used for measuring total leakage rate on either evacuated or pressurised systems
Can be used to measure total leakage rate on any size system
All of the above apply
10. Volume change due to thermal expansion or contraction of a constant volume system during a pressure change measurement test?
Does not affect the leakage rate calculations
Is automatically accounted for by the corrections
Is not normally significant
Has a very significant error on the leakage rate results
11. Which of the following is considered to be a source of acoustic emission?
Defect related deformation
Crack growth
Plastic deformation
All of the above
12. Which of the following is a characteristic of acoustic emission compared with other inspection techniques?
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Page 2 of 4Lavender International: General Assessments: Module 5-6
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-6.html
Detects geometric form of defects
Requires stress
Less material sensitive
More geometry sensitive
13. Which of the following would NOT be considered a use for acoustic emission inspection?
Detection of cracks
Material sorting
Detection of weld defects
Material embrittlement
14. One of the following processes does NOT use acoustic emission inspection for checking and controlling?
Open die forging
Thermocompression bonding
Punch press operations
Shaft straightening
15. What is the typical frequency operating range for acoustic emission equipment?
1-5 MHz
20-1200 KHz
200-1800 KHz
20-1200KHz
16. Which of the following is a potential barrier to acoustic emission applicability?
Geometry component
Intrusive process
Noise
Required to scan local regions in sequence
17. The key element in an acoustic emission senosr is a?
Target
Phase detector
Directional coupler
Piezoelectric crystal
18. Which of the following is a relatively simple application of acoustic emission instrumentation?
Leak testing
Electric power plant
Pumps
Valves
19. Evaluation criteria in acoustic emission testing are?
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Page 3 of 4Lavender International: General Assessments: Module 5-6
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-6.html
Number of hits
Emission during load hold
Count rate
All of the above
20. A major benefit of acoustic emission testing is?
Low cost of equipment
No access required
No removal of insulation necessary
Allows the whole volume of the structure to be inspected non intrusively in a single load operation
No removal of insulation necessary and it allows the whole volume of the structure to be inspected non intrusively in a single load operation
> Check Your Answers
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> Contact Us
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Telephone: + 44 (0) 1226 765 769 Fax: + 44 (0) 1226 760 707
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Page 4 of 4Lavender International: General Assessments: Module 5-6
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-6.html
Here are the corrections:
1. Permeation 2. A tracer gas 3. Halides 4. Limited skill and training is required for personnel 5. 10-6 Std cm3/s 6. Vacuum systems 7. Mass spectrometer in a vacuum 8. Penetrant inspection 9. All of the above apply 10. Is not normally significant 11. All of the above 12. Requires stress 13. Material sorting 14. Open die forging 15. 20-1200 KHz 16. Noise 17. Piezoelectric crystal 18. Leak testing 19. All of the above 20. No removal of insulation necessary and it allows the whole volume of the structure to be inspected non intrusively in a single load operation
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Lavender International Online Assessments: General Familiarity: Module 5-3:
General Familiarity with Other NDT Methods (At Level 2)
Eddy Current Testing / Flux Leakage Testing
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. Which of the following materials could not be tested using electromagnetic inspection?
Carbon steel
Titanium
Glass
Aluminium
Carbon steel and glass
2. The depth at which the eddy current is reduced 37 of the surface value is known as?
Half valve layer
Standard depth of penetration
Tenth value layer
Attenuation depth
3. The letters ICAS stand for?
International Annealed Copper Standard
Internal Applied Conductivity Standard
Induced Alternatiing Current Standard
Inherently Active Comparative Standard
4. Which of the following has the highest conductivity?
Brass
Silver
Copper
Gold
5. Which of the following factors make it difficult to inpect ferromagnetic materials?
Conductivity
Permeability
Resistance
Impedance
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Page 1 of 4Lavender International: General Assessments: Module 5-3
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-3.html
6. Calculate the impedance - Z - of a coil with a resitance - R - of 16 ohms and an inductive reactance - XL - Of 6 ohms?
4.7 ohms
12.2 ohms
17 ohms
22 ohms
7. The angle between the resistance vector and the impedance vector is known is known as the?
Phase angle
Inductance angle
Resistance angle
Alpha angle
8. The term used to describe the distance between a test encircling coil and a plate surface is?
Fill factor
Lift off
Cladding
Surface roughness
9. With respect conductivity and penetration which of the following statements is true?
The higher conductivity the lower penetration
The lower the conductivity the lower the penetration
The lower the conductivity the higher the penetration
The higher the conductivity the higher the penetration
10. Calculate the resistance of a circuit whose voltage is 20 volts and current is 12 amps: V = Ir = 20 x 12?
1.67 ohms
12.5 ohms
120.8 ohms
240 ohms
11. Which of the following instruements is used to measure magnetic flux leakage?
A coil
Hall effect meter
Magnetic tape
A coil and magnetic tape
All of the above
12. What is the approximate relationship between defect depth - D - and signal amplitude - A?
A = K/D
A = K/D2
A = KD 3
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Page 2 of 4Lavender International: General Assessments: Module 5-3
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-3.html
A = KD 2
13. Hard materials generally have which of the following properties?
High retentivity hard to demagnetise
High retentivity easy to demagnetise
Low retentitivity easy to demagnetise
Low retentitivity hard to demagnetise
14. When flux leakage inspecting the test piece should be demagnetised?
Well below saturation
At saturation
Near saturation
Beyond saturation
15. Flow detection is best achieved when the magnetic flux is?
Parallel to the flaw major dimension
At 30 degrees to the flaw major dimension
At 90 degrees to the flaw major dimension
At 60 degrees to the flaw major detection
16. Magnetic field strength in a long coil is determined by?
Applied current strength
Number of turns in the coil
Coil diameter
Applied current strength and number of turns in the coil
All of the above
17. Flux leakage inspection is not likely to find which of the following defectv types?
Surface contamination
Longitudinal seams
Cracks
Overlap
18. What is the S I unit for magnetic flux density?
Gauss
Tesla
Ohms
Weber
19. How may a ferromagnetic material be demagnetised?
Using an AC Coil
Heating above the curie temperature
Reversing DC Coils
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Page 3 of 4Lavender International: General Assessments: Module 5-3
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-3.html
All the above
20. What is the S I unit for magnetic field strength?
Henry
Henry per meter
Amp
Amp per meter
> Check Your Answers
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> Contact Us
Lavender International, Unit 7, Penistone Station, Sheffield, S36 6HP , United Kingdom
Telephone: + 44 (0) 1226 765 769 Fax: + 44 (0) 1226 760 707
All Content & Design is © Copyright 2000 Lavender International NDT Ltd
Page 4 of 4Lavender International: General Assessments: Module 5-3
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-3.html
Here are the corrections:
1. Glass 2. Standard depth of penetration 3. International Annealed Copper Standard 4. Silver 5. Permeability 6. 17 ohms 7. Phase angle 8. Fill factor 9. The higher conductivity the lower penetration 10. 240 ohms 11. All of the above 12. A = KD3 13. High retentivity hard to demagnetise 14. At saturation 15. At 90 degrees to the flaw major dimension 16. Applied current strength and number of turns in the coil 17. Surface contamination 18. Tesla 19. All the above 20. Amp per meter
Lavender International NDT Ltd > NDT Shop Now Open! Unit 7, Penistone Station, Sheffield, S36 6HP, United Kingdom Tuesday, September 18, 2001 < Back Forward >
> Services Courses in MT,
PT, UT, ET, VT, RT, RI, and other services besides... > About Us Our philosophy, meet the team, and much more... > Online AssessmentsTake our quizzes and improve your NDT skills... > Online Bookings Why phone when you can book online... > Alumni A Lavender NDT community... > Resources Lots of interesting and useful NDT stuff...
Lavender International Online Assessments: General Familiarity: Module 5-8:
General Familiarity with Other NDT Methods (At Level 2)
Infra Red Thermography & Neutron Radiography
Questions 1 - 10 Reference: Metals Handbook Ninth Edition Volume 17 Pages 397 - 403 Questions 11 - 20 Reference: Metals Handbook Ninth Edition Volume 17 Pages 387 - 396
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. Which of the following mechanism decsribes the heat flow from hot to cold within an object?
Conduction
Convection
Radiation
Convection and radiation
2. Material properties such as specific heat, density, thermal conductivity, thermal diffisivity and temperature will affect?
Conduction
Convection
Radiation
Conduction and convection
3. In radiation heat transfer which of the following material properties is most important?
Density
Emissivity
Specific heat
Diffusivity
4. As the average temperature of the subject increases, generally the thermal measurement techniqes become?
Impossible
Less sensitive
More sensitive
Unsuitable
5. Which of the following is a non contact temperature sensor?
Pyrometer
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Page 1 of 4Lavender International: General Assessments: Module 5-8
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-8.html
Thermopile
Cholestric liquid crystals
Thermally quenches phosphors
6. Which of the following is a contact temperature sensor?
Radiometer
Thermocouple
Thermal wave inferometer
7. Infrared thermography can be used for which of the following?
Process control
Liquid intrusions
Pelaminations
All of the above
8. Which of the following statements is true with respect to image interpretation?
Large temperature differences are easy to interpret
Large temperature differences are difficult to interpret
Surface anomalies produce stronger indications than subsurface anomalies
Large temperature differences are easy to interpret and Surface anomalies produce stronger indications than subsurface anomalies
9. Which of the following may be used for recording in imaging systems?
Black and white photography
Colour photography
Videotape recorder
All of the above
10. Which of the following statements is false with respect to cholestric liquid crystals?
They are grease like
They emit visible light when excited with UV light
The applied film must be of uniform thickness
Can be applied by brushing
11. In which of the following does Neutron Radiography differ from conventional radiography?
Geometric principles of shadow formation
Variation of attenuation with test piece thickness
Direct imaging on film
All of the above
12. Which of the following statements is false?
X rays are attenuated more by elements of high atomic number
X rays are attenuated more by materials of high density
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Page 2 of 4Lavender International: General Assessments: Module 5-8
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-8.html
Neutron attenuation are generally attenuated less with increasing atomic number
Hydrogen, lithium and boron are not attenuated by thermal neutrons
13. Which of the following radioactive isotopes produce thermal neutrons?
Iridium 192
Californium 252
Cobalt 60
Caesium 137
14. What metal is the target made of when producing thermal neutrons in a van de graaf generator?
Lithium
Beryllium
Cobalt
Tungsten
15. Which of the following is a problem with respect of using radioactive sources to produce thermal neutrons?
Portability
Fine grained film must be used
Long exposure times and the use of coarse grained film
No contrast on low atomic number materials
16. Which of the following applications can neutron radiography be used?
Correct placement of adhesives
Positioning of explosives
Presence of plastic components
All of the above
17. The detection of corrosion in aluminium aircraft components is best detected by?
Eddy currents
Visual inspection
Neutron radiography
Conventional radiography
18. In the transfer method of neutron detection of thin sheet of metal called a transfer screen is used which is generally made of?
Indium
Dysprosium
Gadolium
Indium and dysprosium
19. The transfer method is especially valuable for?
Detection of corrosion
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Page 3 of 4Lavender International: General Assessments: Module 5-8
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-8.html
Inspection of a radioactive specimen
Verify welding of dissimilar metals
Positioning O rings
20. In neutron radiography for a given material attenuation?
Varies directly with thickness
Is inversely proportional to thickness
Varies exponentially with thickness
Is inversely proportional to the thickness squared
> Check Your Answers
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> Contact Us
Lavender International, Unit 7, Penistone Station, Sheffield, S36 6HP , United Kingdom
Telephone: + 44 (0) 1226 765 769 Fax: + 44 (0) 1226 760 707
All Content & Design is © Copyright 2000 Lavender International NDT Ltd
Page 4 of 4Lavender International: General Assessments: Module 5-8
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-8.html
Here are the corrections:
1. Conduction 2. Conduction and convection 3. Emissivity 4. More sensitive 5. Pyrometer 6. Thermocouple 7. All of the above 8. Large temperature differences are easy to interpret and Surface anomalies produce stronger indications than subsurface anomalies 9. All of the above 10. They emit visible light when excited with UV light 11. Direct imaging on film 12. Hydrogen, lithium and boron are not attenuated by thermal neutrons 13. Californium 252 14. Beryllium 15. Long exposure times and the use of coarse grained film 16. All of the above 17. Neutron radiography 18. Indium and dysprosium 19. Inspection of a radioactive specimen 20. Is inversely proportional to thickness
Lavender International NDT Ltd > NDT Shop Now Open! Unit 7, Penistone Station, Sheffield, S36 6HP, United Kingdom Tuesday, September 18, 2001 < Back Forward >
> Services Courses in MT,
PT, UT, ET, VT, RT, RI, and other services besides... > About Us Our philosophy, meet the team, and much more... > Online AssessmentsTake our quizzes and improve your NDT skills... > Online Bookings Why phone when you can book online... > Alumni A Lavender NDT community... > Resources Lots of interesting and useful NDT stuff...
Lavender International Online Assessments: General Familiarity: Module 5-7:
General Familiarity with Other NDT Methods (At Level 2)
Visual Testing
© Copyright 2000. Lavender International Online Assessments are copyrighted and may only be used for personal use. Your use of the asessments signifies your acknowledgement of this fact and full understanding of the website Terms and Conditions.
1. Fibre optic systems work on which of the following principles?
Refelction
Diffraction
Refraction
Reticulation
2. Which part of the retina contains no rods or cones?
Fovea centrails
Iris
Blind spot
Optic nerve
3. Hypermetropia is otherwise known as?
Short sight
Long sight
Normal sight
Magnification sight
4. As the wavelength of electromagnetic radiation increases the frequency will?
Stay the same
Decrease
Increase
Either decrease or increase
5. Resolution is the ability to see which of the following?
The smallest flaw possible
Two flaws adjacent to each other as one
Two flaws adjacent to each other as seperate flaws
A large flaw at a distance of over 3 metres
6. Which colour within the visible spectrum has the shortest wavelength?
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Page 1 of 3Lavender International: General Assessments: Module 5-7
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-7.html
Orange
Red
Blue
Violet
7. What function do the ciliary muscles carry out?
Open and close the pupil
Stop harmful radiation entering the eye
Accomodate the size and thickness of the lens
Focus the light rays on the retina
8. To what wavelength of radiation is the human eye most sensitive?
320 nM
5750 Angstroms
4200 Angstroms
400 nM
9. What is the minimum angle in relation to the test surface that visual examination can be carried out at?
60 degrees
90 degrees
0 degrees
30 degrees
10. How often should a visual inspectors eyes be checked for near vision?
Daily
Annually
Every six months
Only initially
11. Under darkened - scotopicvision - conditions which receptors within the retina are sensitive?
Cones
Rods
Bothe cones and rods
None of the above
12. Direct visual examinations may be carried out using which of the following?
Boroscope
Mirrors
Fibroscope
All of the above
None of the above
13. Stereoscopic vision is limited to magnification factors less than when using singular magnification
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Page 2 of 3Lavender International: General Assessments: Module 5-7
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-7.html
lenses?
None
X2
X5
X10
14. Which of the following weld defects would be visually detectable on a completed weld?
Lack of interun fusion
Sub surface porosity
Lack of side wall fusion
Undercut
15. A measured amount of undercut is detected that is allowable when refernced to an acceptable criteria. The uundercut is therefore decribed as?
A defect
An indication
A flaw
None of the above
> Check Your Answers
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> Contact Us
Lavender International, Unit 7, Penistone Station, Sheffield, S36 6HP , United Kingdom
Telephone: + 44 (0) 1226 765 769 Fax: + 44 (0) 1226 760 707
All Content & Design is © Copyright 2000 Lavender International NDT Ltd
Page 3 of 3Lavender International: General Assessments: Module 5-7
9/18/2001http://www.lavender-ndt.com/assessments/general/module5-7.html
Here are the corrections:
1. Permeation 2. A tracer gas 3. Halides 4. Limited skill and training is required for personnel 5. 10-6 Std cm3/s 6. Vacuum systems 7. Mass spectrometer in a vacuum 8. Penetrant inspection 9. All of the above apply 10. Is not normally significant 11. All of the above 12. Requires stress 13. Material sorting 14. Open die forging 15. 20-1200 KHz 16. Noise 17. Piezoelectric crystal 18. Leak testing 19. All of the above 20. No removal of insulation necessary and it allows the whole volume of the structure to be inspected non intrusively in a single load operation