NDT Test 2 – Ultrasonic Testing Study Guide & UT Revision Notes
Which of the following would make a good coolant?
A) Water
B) Oil
C) Glycerin
D) All of the above - ✔✔D) All of the above
In order to have a reasonable chance at detecting a discontinuity, the reflective surface of the
discontinuity must have a dimension that is at least as long as ____________ wavelength.
A) One-half
B) One
C) Two
D) One-quarter - ✔✔A) One-half
Sound can propagate as:
A) Longitudinal waves
B) Shear waves
C) Surface waves
D) All of the above - ✔✔D) All of the above
When sound travels through a medium:
,A) Its intensity diminishes with distance
B) It spreads perpendicular to the primary direction of wave travel
C) Its speed remains constant
D) All of the above - ✔✔D) All of the above
Which of the following waves is able to follow a surface around a curve?
A) A longitudinal wave
B) A shear wave
C) A surface wave
D) A lamb wave - ✔✔C) A surface wave
Shear waves do not propagate in:
A) Solids
B) Gases
C) Liquids
D) Both B and C are correct - ✔✔D) Both B and C are correct
Surface or Rayleigh waves traveling along the surface of relative thick solid material, penetrate
to a depth of approximately:
A) One wavelength
B) Two wavelengths
C) Three wavelengths
D) Infinite wavelengths - ✔✔A) One wavelength
, Resolution generally increases:
A) With increased depth of a defect
B) With a decrease in the transducer frequency
C) When the transducer diameter is reduced
D) With an increase in transducer frequency - ✔✔D) With an increase in transducer frequency
Longitudinal waves are also called:
A) Surface waves
B) Pressure waves
C) Compressional waves
D) Both B and C are correct - ✔✔D) Both B and C are correct
Which of the following ultrasonic techniques require the probe to be held firmly against
component?
A) Contact inspection
B) Weld inspection
C) Angle beam inspection
D) All of the above - ✔✔A) Contact inspection
When performing a contact inspection on a curved surface, what pieced of equipment can be
used to improve coupling?
A) A spherically focused transducer
Which of the following would make a good coolant?
A) Water
B) Oil
C) Glycerin
D) All of the above - ✔✔D) All of the above
In order to have a reasonable chance at detecting a discontinuity, the reflective surface of the
discontinuity must have a dimension that is at least as long as ____________ wavelength.
A) One-half
B) One
C) Two
D) One-quarter - ✔✔A) One-half
Sound can propagate as:
A) Longitudinal waves
B) Shear waves
C) Surface waves
D) All of the above - ✔✔D) All of the above
When sound travels through a medium:
,A) Its intensity diminishes with distance
B) It spreads perpendicular to the primary direction of wave travel
C) Its speed remains constant
D) All of the above - ✔✔D) All of the above
Which of the following waves is able to follow a surface around a curve?
A) A longitudinal wave
B) A shear wave
C) A surface wave
D) A lamb wave - ✔✔C) A surface wave
Shear waves do not propagate in:
A) Solids
B) Gases
C) Liquids
D) Both B and C are correct - ✔✔D) Both B and C are correct
Surface or Rayleigh waves traveling along the surface of relative thick solid material, penetrate
to a depth of approximately:
A) One wavelength
B) Two wavelengths
C) Three wavelengths
D) Infinite wavelengths - ✔✔A) One wavelength
, Resolution generally increases:
A) With increased depth of a defect
B) With a decrease in the transducer frequency
C) When the transducer diameter is reduced
D) With an increase in transducer frequency - ✔✔D) With an increase in transducer frequency
Longitudinal waves are also called:
A) Surface waves
B) Pressure waves
C) Compressional waves
D) Both B and C are correct - ✔✔D) Both B and C are correct
Which of the following ultrasonic techniques require the probe to be held firmly against
component?
A) Contact inspection
B) Weld inspection
C) Angle beam inspection
D) All of the above - ✔✔A) Contact inspection
When performing a contact inspection on a curved surface, what pieced of equipment can be
used to improve coupling?
A) A spherically focused transducer
