CWB Level II Welding Inspection and
Ultrasonic Inspection Questions and
Complete Answers
Can shear waves operate in similar ways to longitudinal waves in the water?
Yes, because there are a lot of attraction between the atoms.
No, because it's not enough force of attraction between the atoms of water.
Yes, they certainly can operate in similar ways.
Yes, because shear waves cause more vibration than longitudinal waves. - Answer: No, because it's
not enough force of attraction between the atoms of water.
As the direction of approach of the beam is changed, the amplitude of the wave reflected from a
spherical pore can be expected to:
not vary significantly.
rise to a peak only if the probe were moved in the plane of the plate.
rise to a maximum then decrease. - Answer: not vary significantly.
Which type of display gives a cross-sectional view showing the length and depth of discontinuities?
A-scan
B-scan
P-scan - Answer: B-scan
If you are examining a groove weld in a plate from one surface with an angle probe, you would
examine the upper portion of the weld by:
placing the probe on the weld reinforcement.
moving the probe as close as possible to the weld.
using a normal probe close to the edge of the weld.
moving the probe away from the weld so the beam bounces off the lower surface to strike the upper
portion of the weld.
none of the above. The upper portion cannot be examined. - Answer: moving the probe away from
the weld so the beam bounces off the lower surface to strike the upper portion of the weld.
,When working to CSA W59, to what must the ultrasonic operator be certified?
CAN/CGSB-48.9712, Certification of Nondestructive Testing Personnel.
CAN/ CGSB-59.9712, Certification.
a and b
none of the above - Answer: CAN/CGSB-48.9712, Certification of Nondestructive Testing Personnel.
Sound wave is a mechanical vibration.
No, it is like gamma radiation.
Yes, it is vibration that has characteristic frequency, that is, a number of vibrations per second.
No, it is a radiation vibration.
Yes, it is like spiritual vibration. - Answer: Yes, it is vibration that has characteristic frequency, that is,
a number of vibrations per second.
For imperfections interpreted as incomplete fusion, the maximum acceptable length according to
ASME Section VIII, Div. 1 is:
20 mm.
1/3 T (where T is weld thickness).
neither of the above. Incomplete fusion imperfections are unacceptable regardless of length. -
Answer: neither of the above. Incomplete fusion imperfections are unacceptable regardless of
length.
In UT probe of the transverse wave mode, is the angle of incidence always equal to the angle of
refraction?
The angle of incidence is always more.
The angle of refraction is always more.
Both angles are regulated by frequency.
Yes - Answer: The angle of refraction is always more.
Distance calibration using an IIW block for a normal (longitudinal mode) probe requires the probe to
be placed on the:
side to reflect off the back wall.
top of the block such that the beam reflects from the 1.5 mm hole.
other edge to reflect off the curved end. - Answer: side to reflect off the back wall.
, Why is good acoustic contact between the transducer and the test specimen needed? Select the
most correct response:
Ultrasonic waves of the frequency used in inspection do not travel far in air, so good coupling
between the transducer and the specimen is needed. (Section 2.4).
Ultrasonic waves of the frequency used in inspection travel far in air, so good coupling between the
transducer and the specimen is needed. (Section 2.4).
Both A and B
Neither A nor B - Answer: Ultrasonic waves of the frequency used in inspection do not travel far in
air, so good coupling between the transducer and the specimen is needed. (Section 2.4).
The amplifier in the ultrasonic testing circuit performs the following task:
It regulates the vertical beam deflection.
It regulates the horizontal time-base.
It regulates the gate's size.
It regulates the frequency. - Answer: It regulates the vertical beam deflection.
To reduce the height of an indication on the screen by 50%, you would turn the gain control (or
attenuator) through:
2 dB.
20 dB.
60 dB.
50 dB.
6 dB. - Answer: 6 dB.
In most codes and standards the acceptance or rejection of a discontinuity is based on whether it is
shown that it will cause failure.
True
False - Answer: True
Is it possible to use acoustic emission method for global monitoring of the structure service life?
Yes
No - Answer: Yes
Ultrasonic Inspection Questions and
Complete Answers
Can shear waves operate in similar ways to longitudinal waves in the water?
Yes, because there are a lot of attraction between the atoms.
No, because it's not enough force of attraction between the atoms of water.
Yes, they certainly can operate in similar ways.
Yes, because shear waves cause more vibration than longitudinal waves. - Answer: No, because it's
not enough force of attraction between the atoms of water.
As the direction of approach of the beam is changed, the amplitude of the wave reflected from a
spherical pore can be expected to:
not vary significantly.
rise to a peak only if the probe were moved in the plane of the plate.
rise to a maximum then decrease. - Answer: not vary significantly.
Which type of display gives a cross-sectional view showing the length and depth of discontinuities?
A-scan
B-scan
P-scan - Answer: B-scan
If you are examining a groove weld in a plate from one surface with an angle probe, you would
examine the upper portion of the weld by:
placing the probe on the weld reinforcement.
moving the probe as close as possible to the weld.
using a normal probe close to the edge of the weld.
moving the probe away from the weld so the beam bounces off the lower surface to strike the upper
portion of the weld.
none of the above. The upper portion cannot be examined. - Answer: moving the probe away from
the weld so the beam bounces off the lower surface to strike the upper portion of the weld.
,When working to CSA W59, to what must the ultrasonic operator be certified?
CAN/CGSB-48.9712, Certification of Nondestructive Testing Personnel.
CAN/ CGSB-59.9712, Certification.
a and b
none of the above - Answer: CAN/CGSB-48.9712, Certification of Nondestructive Testing Personnel.
Sound wave is a mechanical vibration.
No, it is like gamma radiation.
Yes, it is vibration that has characteristic frequency, that is, a number of vibrations per second.
No, it is a radiation vibration.
Yes, it is like spiritual vibration. - Answer: Yes, it is vibration that has characteristic frequency, that is,
a number of vibrations per second.
For imperfections interpreted as incomplete fusion, the maximum acceptable length according to
ASME Section VIII, Div. 1 is:
20 mm.
1/3 T (where T is weld thickness).
neither of the above. Incomplete fusion imperfections are unacceptable regardless of length. -
Answer: neither of the above. Incomplete fusion imperfections are unacceptable regardless of
length.
In UT probe of the transverse wave mode, is the angle of incidence always equal to the angle of
refraction?
The angle of incidence is always more.
The angle of refraction is always more.
Both angles are regulated by frequency.
Yes - Answer: The angle of refraction is always more.
Distance calibration using an IIW block for a normal (longitudinal mode) probe requires the probe to
be placed on the:
side to reflect off the back wall.
top of the block such that the beam reflects from the 1.5 mm hole.
other edge to reflect off the curved end. - Answer: side to reflect off the back wall.
, Why is good acoustic contact between the transducer and the test specimen needed? Select the
most correct response:
Ultrasonic waves of the frequency used in inspection do not travel far in air, so good coupling
between the transducer and the specimen is needed. (Section 2.4).
Ultrasonic waves of the frequency used in inspection travel far in air, so good coupling between the
transducer and the specimen is needed. (Section 2.4).
Both A and B
Neither A nor B - Answer: Ultrasonic waves of the frequency used in inspection do not travel far in
air, so good coupling between the transducer and the specimen is needed. (Section 2.4).
The amplifier in the ultrasonic testing circuit performs the following task:
It regulates the vertical beam deflection.
It regulates the horizontal time-base.
It regulates the gate's size.
It regulates the frequency. - Answer: It regulates the vertical beam deflection.
To reduce the height of an indication on the screen by 50%, you would turn the gain control (or
attenuator) through:
2 dB.
20 dB.
60 dB.
50 dB.
6 dB. - Answer: 6 dB.
In most codes and standards the acceptance or rejection of a discontinuity is based on whether it is
shown that it will cause failure.
True
False - Answer: True
Is it possible to use acoustic emission method for global monitoring of the structure service life?
Yes
No - Answer: Yes
