HEMISPHERES 3.0 LEVEL VII DISCHARGE &
PREVENTION EXAM QUESTIONS WITH
CORRECT ANSWERS
1. Which control on ultrasonic testing instruments allows the operator to
adjust the display for water distance during an immersion test?
Reject control
Gain control
Pulse length control
Sweep delay control
2. Describe the difference between shear waves and longitudinal waves in
terms of particle motion and wave propagation.
Shear waves involve particle motion that is perpendicular to wave
propagation, while longitudinal waves involve particle motion that
is parallel to wave propagation.
Longitudinal waves are only found in solids.
Shear waves travel faster than longitudinal waves in all mediums.
Shear waves and longitudinal waves both involve parallel particle
motion.
3. Longitudinal Waves travel in solid, liquids and gases, and are also known
as:
Shock Waves
Lamb Waves
, Compressional Waves
Transverse waves
4. If a technician notices inconsistent indications during a surface wave test,
what should they check first to ensure accurate results?
, The angle of the transducer
The surface condition of the test material
The frequency settings of the ultrasonic equipment
The type of couplant used
5. Which ultrasonic testing method is specifically noted for its inability to
determine the depth of a discontinuity?
Angle beam testing method
Through-transmission testing method
Straight beam testing method
Immersion testing method
6. Describe how improper frequency can affect the results of a surface wave
test.
Improper frequency can lead to inaccurate indications or missed
defects during a surface wave test.
Improper frequency has no effect on the test results.
Improper frequency only affects the calibration of the equipment.
Improper frequency enhances the sensitivity of the test.
7. If a technician observes a second discontinuity indication during an
ultrasonic test, what should be the next step in the testing process?
Change the type of transducer used
Adjust the calibration settings
Investigate the nature and cause of the discontinuity
Ignore it and proceed with the test
, 8. Describe why mechanical and electrical stability is important for materials
used in ultrasonic transducers.
Stability is irrelevant as long as the transducer is calibrated
correctly.
Electrical stability is only relevant for digital transducers, not analog
ones.
Mechanical stability is not important as long as the material
generates sound.
Mechanical and electrical stability ensures consistent
performance and reliability in generating ultrasonic waves.
9. A shear waves. The transducer that contains the thinnest piezoelectric
crystal is a:
5 MHz transducer
1 MHz transducer
15 MHz transducer
25 MHz transducer
10. Describe the relationship between the angle of incidence and the angle
of reflection in ultrasonic testing.
The angle of incidence is half of the angle of reflection.
The angle of incidence is always greater than the angle of
reflection.
The angle of incidence is equal to the angle of reflection
according to the law of reflection.
The angle of incidence and angle of reflection are unrelated.
11. Why is the ability to withstand high temperatures important for materials
used in ultrasonic transducers?
PREVENTION EXAM QUESTIONS WITH
CORRECT ANSWERS
1. Which control on ultrasonic testing instruments allows the operator to
adjust the display for water distance during an immersion test?
Reject control
Gain control
Pulse length control
Sweep delay control
2. Describe the difference between shear waves and longitudinal waves in
terms of particle motion and wave propagation.
Shear waves involve particle motion that is perpendicular to wave
propagation, while longitudinal waves involve particle motion that
is parallel to wave propagation.
Longitudinal waves are only found in solids.
Shear waves travel faster than longitudinal waves in all mediums.
Shear waves and longitudinal waves both involve parallel particle
motion.
3. Longitudinal Waves travel in solid, liquids and gases, and are also known
as:
Shock Waves
Lamb Waves
, Compressional Waves
Transverse waves
4. If a technician notices inconsistent indications during a surface wave test,
what should they check first to ensure accurate results?
, The angle of the transducer
The surface condition of the test material
The frequency settings of the ultrasonic equipment
The type of couplant used
5. Which ultrasonic testing method is specifically noted for its inability to
determine the depth of a discontinuity?
Angle beam testing method
Through-transmission testing method
Straight beam testing method
Immersion testing method
6. Describe how improper frequency can affect the results of a surface wave
test.
Improper frequency can lead to inaccurate indications or missed
defects during a surface wave test.
Improper frequency has no effect on the test results.
Improper frequency only affects the calibration of the equipment.
Improper frequency enhances the sensitivity of the test.
7. If a technician observes a second discontinuity indication during an
ultrasonic test, what should be the next step in the testing process?
Change the type of transducer used
Adjust the calibration settings
Investigate the nature and cause of the discontinuity
Ignore it and proceed with the test
, 8. Describe why mechanical and electrical stability is important for materials
used in ultrasonic transducers.
Stability is irrelevant as long as the transducer is calibrated
correctly.
Electrical stability is only relevant for digital transducers, not analog
ones.
Mechanical stability is not important as long as the material
generates sound.
Mechanical and electrical stability ensures consistent
performance and reliability in generating ultrasonic waves.
9. A shear waves. The transducer that contains the thinnest piezoelectric
crystal is a:
5 MHz transducer
1 MHz transducer
15 MHz transducer
25 MHz transducer
10. Describe the relationship between the angle of incidence and the angle
of reflection in ultrasonic testing.
The angle of incidence is half of the angle of reflection.
The angle of incidence is always greater than the angle of
reflection.
The angle of incidence is equal to the angle of reflection
according to the law of reflection.
The angle of incidence and angle of reflection are unrelated.
11. Why is the ability to withstand high temperatures important for materials
used in ultrasonic transducers?
