CWB Module 17 Surface inspection
Exam Questions and Answers Verified
Solutions Latest Update (2026/2027)
Question:
A) Capillary action
B) Surface tension
C) Viscosity
Answer:
B) Surface tension
Question:
True or False?
"The ability of a liquid to wet a solid surface can be measured in terms of the
contact angle." -
Answer:
True
Question:
The phenomenon by which water rises up a narrow tube or by which liquid
can penetrate a
crack is known as:
A) Capillary action
B) Surface tension
C) Viscosity
,Answer:
A) Capillary action
Question:
How must a fluorescent dye be viewed?
Answer:
Under a UV (black) light or a mercury
vapor light
Question:
Which of the following penetrants require treatment with a separate agent
before the excess
can be removed?
A) Post-emulsifiable
B) Water-washable
C) Post-remover
D) Solvent-removable
Answer:
A) Post-emulsifiable
Question:
What type of developer is normally used with the solvent-removal process to
spot check welds?
Answer:
Non-aqueous
, Question:
True or False?
"The fluorescent post-emulsified penetrant process is often recommended
for high sensitivity
applications such as detection of fatigue cracks.:
Answer:
True
Question:
Does the liquid penetrant process work on stainless steel and aluminum?
Answer:
Yes
Question:
Give one way in which a change to a liquid penetrant procedure could be
qualified.
Answer:
Use a comparator block to prove you can find the indications
Question:
True or False?
"When using liquid penetrant inspection, the surface must be ground smooth
to remove all
Exam Questions and Answers Verified
Solutions Latest Update (2026/2027)
Question:
A) Capillary action
B) Surface tension
C) Viscosity
Answer:
B) Surface tension
Question:
True or False?
"The ability of a liquid to wet a solid surface can be measured in terms of the
contact angle." -
Answer:
True
Question:
The phenomenon by which water rises up a narrow tube or by which liquid
can penetrate a
crack is known as:
A) Capillary action
B) Surface tension
C) Viscosity
,Answer:
A) Capillary action
Question:
How must a fluorescent dye be viewed?
Answer:
Under a UV (black) light or a mercury
vapor light
Question:
Which of the following penetrants require treatment with a separate agent
before the excess
can be removed?
A) Post-emulsifiable
B) Water-washable
C) Post-remover
D) Solvent-removable
Answer:
A) Post-emulsifiable
Question:
What type of developer is normally used with the solvent-removal process to
spot check welds?
Answer:
Non-aqueous
, Question:
True or False?
"The fluorescent post-emulsified penetrant process is often recommended
for high sensitivity
applications such as detection of fatigue cracks.:
Answer:
True
Question:
Does the liquid penetrant process work on stainless steel and aluminum?
Answer:
Yes
Question:
Give one way in which a change to a liquid penetrant procedure could be
qualified.
Answer:
Use a comparator block to prove you can find the indications
Question:
True or False?
"When using liquid penetrant inspection, the surface must be ground smooth
to remove all
