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chapter 3 > ndt > Flashcards

ndt Flashcards

1
Q

The energy carried by a wave depends on: (Multiple Choice)
Question options:

A) amplitude and velocity.

B) velocity and frequency.

C) wave length and frequency.

D) amplitude and frequency.

A

D) amplitude and frequency.

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2
Q

The display scan that permits capture of information and is viewed in plan view is: (Multiple Choice)
Question options:

A) C-scan.

B) A-scan.

C) B-scan.

D) D-scan.

A

A) C-scan.

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3
Q

The ASME approachs for evaluation of discontinuities are: (Multiple Choice)
Question options:

A) amplitude, size, and type.

B) type only.

C) amplitude and size.

D) size and type.

A

A) amplitude, size, and type.

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4
Q

What effects might mode conversion have due to internal reflections? (Multiple Choice)
Question options:

A) There are no effects due to mode change

B) Mode conversion due to internal reflection cannot occur

C) The apparent location of the reflection on the screen will be shifted because of mode change which is always accompanied by velocity change

D) It changes the effective angle of the probe

A

C) The apparent location of the reflection on the screen will be shifted because of mode change which is always accompanied by velocity change

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5
Q

Rejection of discontinuities are based on two general approaches: (Multiple Choice)
Question options:

A) quality control criterion and size.

B) size only.

C) quality control and fitness-for-purpose criterion.

D) fitness-for-purpose and type.

A

D) fitness-for-purpose and type.

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6
Q

Which of the following correctly describes the first critical angle? (Multiple Choice)
Question options:

A) The angle of incidence at which all the refracted beams are parallel to the surface

B) The angle of incidence at which the refracted longitudinal beam is parallel to the surface

C) Any angle that produces zero reflection

D) The angle at which the longitudinal and transverse waves separate

A

B) The angle of incidence at which the refracted longitudinal beam is parallel to the surface

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7
Q

How is the angle of an angle probe calibrated by using the IIW ultrasonic block? (Multiple Choice)
Question options:

A) The beam is reflected from the curved end and the probe is moved back and forth to fix the maximum signal on the screen. The angle is read off the scale on the block.

B) The probe is moved back and forth and the beam is directed to one of the round holes to fix the maximum signal location. The angle is read off the scale at the exit point.

C) A separate receiver probe is placed on opposite sides of the block and when the maximum signal is obtained, the angle is measured between the beam and surface of the block.

D) The angle cannot be found by using the IIW block.

A

B) The probe is moved back and forth and the beam is directed to one of the round holes to fix the maximum signal location. The angle is read off the scale at the exit point.

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8
Q

The change in direction of an incident sound wave below the surface is know as: (Multiple Choice)
Question options:

A) refraction.

B) incident sound beam.

C) reflection.

D) echo.

A

B) incident sound beam.

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9
Q

The correction of incorrect distance representation on an A-scan display is known as: (Multiple Choice)
Question options:

A) resolution.

B) sensitivity.

C) linearity.

D) DAC.

A

linearity

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10
Q

What is the S.I. unit used to measure the amount of potential damage-causing radiation absorbed? (Multiple Choice)
Question options:

A) Sievert

B) Curie

C) Rem

D) Roentgen

A

D) Roentgen

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11
Q

According to CSA W59, the criteria used for evaluating liquid penetrant testing are the same as those for: (Multiple Choice)
Question options:

A) ultrasonic inspection.

B) visual inspection.

C) radiographic inspection.

A

B) visual inspection.

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12
Q

Which of the following best describes the basis of the magnetic particle inspection method? (Multiple Choice)
Question options:

A) The increased resistance to the flow of electric current when a discontinuity is present

B) The attraction of magnetic particles to a flux leakage field formed when a discontinuity lies parallel to an applied magnetic field

C) The attraction of magnetic particles to a flux leakage field formed when a discontinuity lies at a perpendicular angle to the induced magnetic field

D) The attraction of magnetic particles to the strong fields formed when a material is magnetically saturated

A

C) The attraction of magnetic particles to a flux leakage field formed when a discontinuity lies at a perpendicular angle to the induced magnetic field

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13
Q

The ability of a liquid penetrant to be used for leak testing depends on the phenomenon of: (Multiple Choice)
Question options:

A) fluorescence.

B) capillary action.

C) density.

D) viscosity.

E) lipophilic.

A

B) capillary action.

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14
Q

The property of liquids that makes them try to reduce their surface area is known as: (Multiple Choice)
Question options:

A) capillary action.

B) fluorescence.

C) viscosity.

D) surface tension.

A

D) surface tension.

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15
Q

The eddy current testing method requires that the: (Multiple Choice)
Question options:

A) base material be ferrous as a magnetic field induces a current.

B) the current used is DC.

C) test part contact is good for conduction.

D) test part creates its own magnetic field opposing the applied field.

A

C) test part contact is good for conduction.

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16
Q

Visible dye and fluorescent dye are further categorized by: (Multiple Choice)
Question options:

A) dwell times.

B) method of application.

C) method of removal.

D) viscosity.

A

A) dwell times.

17
Q

The wetting abilities of a penetrant depends on the contact angle. What angle is the most favourable for good wettability? (Multiple Choice)
Question options:

A) A large angle

B) A medium angle

C) A small angle

D) A 90° angle

A

C) A small angle

18
Q

When trying to detect a solidification crack in a weld you should place a yoke: (Multiple Choice)
Question options:

A) along the weld axis.

B) across the weld.

C) on top of the weld.

D) underneath the weld.

A

B) across the weld.

19
Q

An indication appearing at the toe of a weld not due to any known defect is a: (Multiple Choice)
Question options:

An indication appearing at the toe of a weld not due to any known defect is a: (Multiple Choice)
Question options:

A) false indication.

B) non-relevant indication.

C) discontinuity.

D) relevant indication.
B) non-relevant indication.

C) discontinuity.

D) relevant indication.

A

A) false indication.

20
Q

Resistance seam welding is employed to produce a continues or non-continuous seam joint between faying surfaces. (True/False)
Question options:
True
False

A

True

21
Q

When using the submerged arc welding process, which current/polarity provides better control over bead shape and deeper penetration? (Multiple Choice)
Question options:

A) Direct current electrode positive (DCEP)

B) Direct current electrode negative (DCEN)

C) Alternating current (AC)

D) Pulsed alternating current(PAC)

A

A) Direct current electrode positive (DCEP)

22
Q

The melting rate of the SMAW electrode is dependent on: (Multiple Choice)
Question options:

A) voltage.

B) current.

C) stickout.

D) arc length.

A

B) current.

23
Q

In the electron beam welding process, the heat required for welding is supplied by: (Multiple Choice)
Question options:

A) accelerated negatively charged particles.

B) accelerated positively charged particles.

C) an arc between a gun and the work.

D) resistance heating.

A

A) accelerated negatively charged particles.

24
Q

The position for the electoslag welding process is: (Multiple Choice)
Question options:

A) vertical down.

B) flat.

C) horizontal.

D) vertical up.

A

D) vertical up.

25
Q

Fluxes for submerged arc welding: (Multiple Choice)
Question options:

A) must be handled with care as they are electrically conductive.

B) when molten, provide a current path to sustain the arc.

C) must be mixed with water and pressed prior to use.

D) are extruded onto the electrode as it is fed through the welding head.

A

A) must be handled with care as they are electrically conductive.

26
Q

When an arc is formed between two electrodes: (Multiple Choice)
Question options:

A) electricity flows from the negative cathode to the positive anode.

B) electricity flows from the positive cathode to the negative anode.

C) electricity flows at random between the anode and cathode.

D) electricity stops flowing once the arc is established.

A

A) electricity flows from the negative cathode to the positive anode.

27
Q

Fluxes for submerged arc welding: (Multiple Choice)
Question options:

A) must be handled with care as they are electrically conductive.

B) when molten, provide a current path to sustain the arc.

C) must be mixed with water and pressed prior to use.

D) are extruded onto the electrode as it is fed through the welding head.

A

A) must be handled with care as they are electrically conductive.

28
Q

The main components used to rectify are: (Multiple Choice)
Question options:

A) diodes.

B) transistors.

C) inductors.

D) transformers.

A

A) diodes.

29
Q

SCR control of a welding power source is typically used on which type of input power? (Multiple Choice)
Question options:

A) DC generators

B) Single phase input

C) Three phase input

D) Inverters

A

C) Three phase input

30
Q

A plasma can best be described as: (Multiple Choice)
Question options:

A) an ionized gas.

B) an inert gas.

C) a good insulator.

D) a high temperature gas.

A

A) an ionized gas.

31
Q

What is the minimum temperature in the centre of a welding arc column? (Multiple Choice)
Question options:

A) 500 °C

B) 1,000 °C

C) 5,000 °C

D) 50,000 °C

A

C) 5,000 °C

32
Q

Impedance is: (Multiple Choice)
Question options:

A) the algebraic sum of resistance, capacitance, and inductance.

B) the sum of resistance and inductance.

C) the algebraic sum of capacitance and resistance.

D) none of the above.

A

A) the algebraic sum of resistance, capacitance, and inductance.

33
Q

For an ideal CC welding power source, an SMAW welder can indirectly increase the energy in the arc without changing the power source setting by: (Multiple Choice)
Question options:

A) maintaining a short arc.

B) maintaining a long arc.

C) travelling faster.

D) changing the electrode size.

A

B) maintaining a long arc.

34
Q
A

chapter 3 (14 decks)

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