1267 + Mcqs in Testing Page 10 McqOptions

451.	The gamma factor of Tm-170 is:
A.	1.37 R·h-1·Ci-1at one metre
B.	0.59 R·h-1·Ci-1at one metre
C.	0.0062 R·h-1·Ci-1at one metre
D.	0.38 R·h-1·Ci-1at one metre
Answer» D. 0.38 R·h-1·Ci-1at one metre

Discussion

452.	A beam of radiation consisting of a single wavelength is known as: (choose one)
A.	Microscopic radiation
B.	Monochromatic radiation
C.	Heterogeneous radiation
D.	Fluoroscopic radiation
Answer» C. Heterogeneous radiation

Discussion

453.	In order to increase latitude so that thick and thin portions may be radiographed atreasonable viewing densities simultaneously:
A.	Fluorescent screen should be employed
B.	Led screens should be at least 5 mm thick
C.	The cassette may be loaded with two separate films of different speeds
D.	Radiograph the object at low energy
Answer» D. Radiograph the object at low energy

Discussion

454.	When using a straight beam technique to examine a thick test piece what change(s) would you expect to see in back wall echo size as you approach the side of the test piece? (Transducer remains completely on test piece)
A.	No change
B.	Increase
C.	Decrease
D.	Depends on material acoustic velocity
Answer» D. Depends on material acoustic velocity

Discussion

455.	Higher frequency transducers produce which of the following?
A.	Greater beam spread, sensitivity and resolution
B.	Greater sensitivity, resolution and penetration
C.	Greater penetration, attenuation and resolution
D.	Greater sensitivity, resolution and attenuation
Answer» E.

Discussion

456.	Materials which can readily be inspected with frequencies of 1 to 5 MHz are:
A.	Steel, cast iron and concrete
B.	Titanium, wood and aluminium
C.	Magnesium, titanium and steel
D.	All of the above
Answer» D. All of the above

Discussion

457.	The relationship between the longitudinal wave incident angle and the refracted shearwave angle is defined by:
A.	Snell's law
B.	Snell's constant
C.	The law of acoustics
D.	Fraunhofer’s law
Answer» B. Snell's constant

Discussion

458.	What is the minimum time considered necessary for dark adaptation of the eyes priorto evaluating the results of a fluorescent penetrant test?
A.	1 minute
B.	2 minutes
C.	5 minutes
D.	10 minutes
Answer» D. 10 minutes

Discussion

459.	A plot of film density versus log of relative exposure is called:
A.	An H&D curve
B.	A sensitometric curve
C.	A characteristic curve
D.	All of the above
Answer» E.

Discussion

460.	The velocity of surface waves is approximatelyshear waves in the same material.
A.	Two times
B.	Four times
C.	One half
D.	Nine-tenths
Answer» E.

Discussion

461.	Re-cycling of penetrant and rinse water is facilitated with which of the followingemulsifier types?
A.	Hydrophobic
B.	Hydrophilic
C.	Lipophilic
D.	Hygroscopic
Answer» C. Lipophilic

Discussion

462.	When the penumbra on a radiograph measures less than 0.5 mm (0.020 inches), theimage will appear to unaided eye of the film interpreter as:
A.	Fuzzy
B.	Sharp
C.	Distorted
D.	Dark
Answer» C. Distorted

Discussion

463.	Which of the following is not an advantage of Magnetic Particle testing?
A.	Fast and simple to perform
B.	Can detect discontinuities filled with foreign material
C.	Most reliable for finding surface cracks in all types of material
D.	Works well through a thin coat of paint
Answer» D. Works well through a thin coat of paint

Discussion

464.	Forging bursts are most often orientated:
A.	Parallel to the surface
B.	Perpendicular to the surface
C.	In a random manner
D.	At an angle of 45 degrees to the surface
Answer» D. At an angle of 45 degrees to the surface

Discussion

465.	A penetrant which contains an emulsifier is called:
A.	Solvent removable
B.	Water washable
C.	Post emulsifiable
D.	Solvent suspended
Answer» C. Post emulsifiable

Discussion

466.	Which of the following can be magnetised?
A.	Iron
B.	Nickel
C.	Cobalt
D.	All of the above
Answer» E.

Discussion

467.	Generally, X ray output is changed by changing the:
A.	Atomic number of the anode
B.	Tube current of the unit
C.	Supply voltage to the unit
D.	Atomic weight of the cathode
Answer» C. Supply voltage to the unit

Discussion

468.	Dry developer is applied:
A.	Immediately before removal of excess penetrant
B.	Immediately after removal of excess penetrant
C.	After drying of the part
D.	For maximum sensitivity results
Answer» D. For maximum sensitivity results

Discussion

469.	What causes a leakage field in a steel bar?
A.	A crack
B.	Reversal of the magnetic field
C.	Paint on the surface
D.	All of the above
Answer» B. Reversal of the magnetic field

Discussion

470.	Which penetrant test processes commonly use the same penetrants?
A.	Water washable
B.	Water washable and solvent removable
C.	Solvent removable and post emulsifier
D.	None of the above
Answer» D. None of the above

Discussion

471.	The cable that connects the ultrasonic instrument to the search unit is specially designedso that one conductor is centred inside another. The technical name for such a cable is:
A.	BX cable
B.	Conduit
C.	Coaxial cable
D.	Ultrasonic conductor cable grade 20
Answer» D. Ultrasonic conductor cable grade 20

Discussion

472.	The intensifying action of lead screens is caused by:
A.	Secondary X ray emission
B.	Secondary gamma ray emissions
C.	Fluorescence of lead screens
D.	Electron emission
Answer» E.

Discussion

473.	When using a radioactive isotope in making a radiograph, we can express the equationfor exposure as Ci × T. In this equation , Ci stands for:
A.	Current through tube
B.	Intensity in curies or becquerels
C.	Degree of contrast
D.	Coarseness of the film
Answer» C. Degree of contrast

Discussion

474.	The residual method is applicable to:
A.	Surface discontinuities only
B.	Subsurface discontinuities only
C.	Either surface or subsurface discontinuities
D.	All but tight surface cracks
Answer» B. Subsurface discontinuities only

Discussion

475.	Lead intensifying screens are used to:
A.	Decrease exposure time
B.	Increase grain size
C.	Shield film from stray light
D.	All of the above
Answer» B. Increase grain size

Discussion

476.	What useful purpose may be served by maintaining grass on the baseline?
A.	To estimate casting grain size
B.	To provide a reference for estimating signal to noise ratio
C.	To verify adequate coupling to the test piece
D.	All of the above
Answer» D. All of the above

Discussion

477.	Which of the following types of magnetic fields may be present without any externalevidence?
A.	Circular
B.	Longitudinal
C.	Secondary
D.	Tertiary
Answer» B. Longitudinal

Discussion

478.	The threshold energy below which pair production cannot occur is approximately:
A.	100 keV
B.	1 MeV
C.	10 MeV
D.	20 MeV
Answer» C. 10 MeV

Discussion

479.	What minimum warm-up time is required for acceptable performance of a mercuryVapour arc black light?
A.	None
B.	2 minutes
C.	5 minutes
D.	10 minutes
Answer» D. 10 minutes

Discussion

480.	Which of the following is an advantage of gamma ray over X ray sources forradiography?
A.	Portability
B.	No external power supply needed
C.	Ruggedness
D.	All of the above
Answer» E.

Discussion

481.	What amount of time is normally considered necessary for dark adaption of the eyes prior to performing a fluorescent penetrant test?
A.	None required
B.	1 to 2 minutes
C.	3 to 5 minutes
D.	5 to 10 minutes
Answer» D. 5 to 10 minutes

Discussion

482.	An increase in gain of how many decibels corresponds to a 5:1 increase in flaw echoamplitude?
A.	10
B.	14
C.	6
D.	20
Answer» C. 6

Discussion

483.	The typical temperature ranges for conducting a liquid penetrant test is:
A.	60 to 100ºC
B.	10 to 60ºF
C.	16 to 52ºC
D.	10 to 20ºK
Answer» C. 16 to 52ºC

Discussion

484.	Which of the following is not an advantage of magnetic particles testing?
A.	Fast and simple to perform
B.	Can detect discontinuities filled with foreign material
C.	Most reliable for finding surface cracks in all types of material
D.	Works well through a thin coat of paint
Answer» D. Works well through a thin coat of paint

Discussion

485.	The type of method most frequently used with mobile equipment is the:
A.	Indirect induction method
B.	Wet method with auxiliary tank
C.	Yoke method
D.	Dry magnetic particle powder method
Answer» E.

Discussion

486.	The space within and surrounding a magnetized part of a conductor carrying a currentis known as:
A.	Saturation point
B.	Magnetic field
C.	Ferromagnetic
D.	Paramagnetic
Answer» C. Ferromagnetic

Discussion

487.	Which of the following is false concerning a magnetic field in and around a hollow conductor as compared to that of a solid conductor of the same outside diameter when both are of the same magnetic material, and when the applied current is the same?
A.	The field immediately outside the outer surface of the hollow conductor is greater
B.	The field gradient inside the hollow conductor is steeper
C.	The fields outside the conductors are the same
D.	The fields are the same at the centre
Answer» D. The fields are the same at the centre

Discussion

488.	The penetrameter is a tool used to check the of a radiograph:
A.	Contrast
B.	Definition
C.	Sensitivity
D.	Emulsion
Answer» D. Emulsion

Discussion

489.	The angle of a refracted shear wave generated as a sound wave passes at an anglethrough an acoustic interface is depentant on:
A.	The acoustic impedances of the materials on each side of the interface
B.	The frequency of the incident sound wave
C.	The wavelength of the incident sound wave
D.	The hardness of the materials on each side of the interface
Answer» B. The frequency of the incident sound wave

Discussion

490.	A dark circle type indication appearing on a radiograph that is the result of the failureof a core support to completely melt is called:
A.	A hot tear
B.	A gas hole
C.	An unfused chaplet
D.	A spongy shrink
Answer» D. A spongy shrink

Discussion

491.	The half value layer of lead for Co-60 is approximately 13 mm (0.5 in). If the radiation level on the source side of a 38 mm (1.5 in) lead plate is 0.64 Gy/h (64 R/h):, the radiation level on the opposite side is:
A.	0.08 Gy/h (8 R/h).
B.	0.213 Gy/h (21.33 R/h).
C.	0.107 Gy/h (10.67R/h).
D.	0.32 Gy/h (32 R/h).
Answer» E.

Discussion

492.	Which of the following is most often used for dry magnetic particle inspection:
A.	Full cycle direct current
B.	Half wave rectified alternating current
C.	High voltage, low amperage current
D.	Direct current from electrolytic cells
Answer» C. High voltage, low amperage current

Discussion

493.	Reference standards containing a series of flat bottom holes of the same diameter atdifferent depths in each block are called?
A.	Area-amplitude blocks
B.	Distance-amplitude blocks
C.	IIW blocks
D.	Sizing blocks
Answer» C. IIW blocks

Discussion

494.	Resolution is inversely proportional to:
A.	Wavelength
B.	Crystal thickness
C.	Bandwidth
D.	Mechanical losses
Answer» C. Bandwidth

Discussion

495.	Which of the following is an advantage of a focused transducer?
A.	Extended useful range
B.	Reduced sensitivity in localised area
C.	Improved signal to noise ratio over an extended range
D.	Higher resolution over a limited range
Answer» E.

Discussion

496.	How is the magnetic field strength at the surface of a magnetic conductor having permeability, µ, related to the magnetic field strength, F, at the surface of a nonmagnetic conductor carrying the same current?
A.	F × µ
B.	Same
C.	F/µ
D.	Not related
Answer» C. F/µ

Discussion

497.	When performing a fluorescent penetrant examination, excess penetrant is normallyremoved:
A.	By a hydrophilic scrubber
B.	Under UV light
C.	By solvent spray
D.	By vapour degreasing
Answer» C. By solvent spray

Discussion

498.	According to ASTM E709-95 and API, relevant indications are produced by:
A.	Greasy surfaces
B.	Excessive background
C.	Leakage fields
D.	Rotating Eddy currents
Answer» D. Rotating Eddy currents

Discussion

499.	According to ASTM E709-95 and API, the temperature of the dry particles can be usableup to:
A.	38ºC
B.	2000ºC
C.	49ºC
D.	315ºC
Answer» E.

Discussion

500.	The main reason for using a casting is that:
A.	Castings are stronger than other metal product forms
B.	Castings are normally of higher quality than other metal product forms
C.	Complex shapes of minimum weight are easily manufactured
D.	None of the above
Answer» E.

Discussion

Explore topic-wise MCQs in Embedded Systems.

The gamma factor of Tm-170 is:

A beam of radiation consisting of a single wavelength is known as: (choose one)

In order to increase latitude so that thick and thin portions may be radiographed atreasonable viewing densities simultaneously:

When using a straight beam technique to examine a thick test piece what change(s) would you expect to see in back wall echo size as you approach the side of the test piece? (Transducer remains completely on test piece)

Higher frequency transducers produce which of the following?

Materials which can readily be inspected with frequencies of 1 to 5 MHz are:

The relationship between the longitudinal wave incident angle and the refracted shearwave angle is defined by:

What is the minimum time considered necessary for dark adaptation of the eyes priorto evaluating the results of a fluorescent penetrant test?

A plot of film density versus log of relative exposure is called:

The velocity of surface waves is approximatelyshear waves in the same material.

Re-cycling of penetrant and rinse water is facilitated with which of the followingemulsifier types?

When the penumbra on a radiograph measures less than 0.5 mm (0.020 inches), theimage will appear to unaided eye of the film interpreter as:

Which of the following is not an advantage of Magnetic Particle testing?

Forging bursts are most often orientated:

A penetrant which contains an emulsifier is called:

Which of the following can be magnetised?

Generally, X ray output is changed by changing the:

Dry developer is applied:

What causes a leakage field in a steel bar?

Which penetrant test processes commonly use the same penetrants?

The cable that connects the ultrasonic instrument to the search unit is specially designedso that one conductor is centred inside another. The technical name for such a cable is:

The intensifying action of lead screens is caused by:

When using a radioactive isotope in making a radiograph, we can express the equationfor exposure as Ci × T. In this equation , Ci stands for:

The residual method is applicable to:

Lead intensifying screens are used to:

What useful purpose may be served by maintaining grass on the baseline?

Which of the following types of magnetic fields may be present without any externalevidence?

The threshold energy below which pair production cannot occur is approximately:

What minimum warm-up time is required for acceptable performance of a mercuryVapour arc black light?

Which of the following is an advantage of gamma ray over X ray sources forradiography?

What amount of time is normally considered necessary for dark adaption of the eyes prior to performing a fluorescent penetrant test?

An increase in gain of how many decibels corresponds to a 5:1 increase in flaw echoamplitude?

The typical temperature ranges for conducting a liquid penetrant test is:

Which of the following is not an advantage of magnetic particles testing?

The type of method most frequently used with mobile equipment is the:

The space within and surrounding a magnetized part of a conductor carrying a currentis known as:

Which of the following is false concerning a magnetic field in and around a hollow conductor as compared to that of a solid conductor of the same outside diameter when both are of the same magnetic material, and when the applied current is the same?

The penetrameter is a tool used to check the of a radiograph:

The angle of a refracted shear wave generated as a sound wave passes at an anglethrough an acoustic interface is depentant on:

A dark circle type indication appearing on a radiograph that is the result of the failureof a core support to completely melt is called:

The half value layer of lead for Co-60 is approximately 13 mm (0.5 in). If the radiation level on the source side of a 38 mm (1.5 in) lead plate is 0.64 Gy/h (64 R/h):, the radiation level on the opposite side is:

Which of the following is most often used for dry magnetic particle inspection:

Reference standards containing a series of flat bottom holes of the same diameter atdifferent depths in each block are called?

Resolution is inversely proportional to:

Which of the following is an advantage of a focused transducer?

How is the magnetic field strength at the surface of a magnetic conductor having permeability, µ, related to the magnetic field strength, F, at the surface of a nonmagnetic conductor carrying the same current?

When performing a fluorescent penetrant examination, excess penetrant is normallyremoved:

According to ASTM E709-95 and API, relevant indications are produced by:

According to ASTM E709-95 and API, the temperature of the dry particles can be usableup to:

The main reason for using a casting is that: