LIQUID PENETRANT STUDY GUIDE QUESTIONS WITH
ANSWERS 2025/2026 GRADED A+
How long must a port be kept wet with penetrate before the removal process is started -
It varies depending on penetrant used, material testing, sensitivity desired, and the type
of discontinuities to be detected
Which of the following factors will affect resolution of penetrant indications - 1. The
sensitivity of the penetrant materials used
2. The surface condition of the part
3. The temperature of the part and/or penetrate
Which of the following is an acceptable method for applying a web developers -
Spraying or dipping
When using a fluorescent penetrant, the actual inspection must be performed - In a
darkened area under a black light
A generally excepted method for removing excess non-water washable penetrant is -
Wiping in cautiously cleaning the test specimen with a cleaner dampened cloth
Why is it not advisable to look directly into a black light - It will possibly cloud the vision
of the person looking into the light for a short period of time
The failure to completely remove acid materials for my part before fluorescent penetrant
is applied will result in - A decrease in the florescence of the penetrant
Penetrance may be classified or subdivided by the method used to remove excess
penetrate. Which of the following is a proper classification in accordance with the
statement - Water-washable
Which of the following surface contaminants cannot be removed by cleaning ports in a
vapor degreaser - Rust
Which of the following is not a basic inspection principle that applies to all penetrant
methods - Indications glow when illuminated with a black light
Which of the following parts could not be tested by the liquid penetrate method - Apart
made from a porous material
Usually, the most desirable method of removing excess water washable penetrant after
the dwell time is by - A low pressure coarse water spray
The purpose of an emulsifier is to - Combine with the penetrant to make the result
mixture removable by a water rinse
, Which of the following are commonly excepted methods for applying penetrants - 1.
Dipping the part in penetrant (dipping)
2. Pouring the penetrant over the test specimen (flowing)
3. Spraying the penetrate on the test specimen (spraying)
The penetrant applied to the surface of a test specimen - is drawn into discontinuities by
capillary action
When conducting a water washable liquid penetrant test, the web developer is applied -
After removal of the penetrant
Which of the following penetrant methods does not normally require a source of
electricity to properly conduct a test - Visible dye pentrant method
Which of the following penetrant systems is generally considered least sensitive - water
-washable, visible dye.
Black light with a proper functioning filter in place used for fluorescent penetrate
inspection can cause permanent damage to - None of the below
Human tissues, human eyes, human blood cells
Developer assist in the detection of liquid penetrant indications by - Providing a
contrasting background
Which of the following statements is true - If the dryer is too high, the heat may degrade
the effectiveness of the penetrate
Material which when applied over the film of the penetrant on the surface of a part
mixes with the penetrant, and which enables it to be washed off the surface is - An
emulsifier
Black light equipment is required when doing penetrant testing by the - Fluorescent
penetrant method
Liquid penetration testing is capable of detecting - discontinuities open to the surface
The term used to define the tendency of certain liquids to penetrate into small openings
such as cracks or fissures is - Capillary action
When using a web developer - A thin layer of developer is better than a thick layer for
showing very fine cracks
Color contrast penetrants are commercially available in which of the following variations
- 1. Normal solvent clean type
2. Water wash type
3. Post emulsification time
ANSWERS 2025/2026 GRADED A+
How long must a port be kept wet with penetrate before the removal process is started -
It varies depending on penetrant used, material testing, sensitivity desired, and the type
of discontinuities to be detected
Which of the following factors will affect resolution of penetrant indications - 1. The
sensitivity of the penetrant materials used
2. The surface condition of the part
3. The temperature of the part and/or penetrate
Which of the following is an acceptable method for applying a web developers -
Spraying or dipping
When using a fluorescent penetrant, the actual inspection must be performed - In a
darkened area under a black light
A generally excepted method for removing excess non-water washable penetrant is -
Wiping in cautiously cleaning the test specimen with a cleaner dampened cloth
Why is it not advisable to look directly into a black light - It will possibly cloud the vision
of the person looking into the light for a short period of time
The failure to completely remove acid materials for my part before fluorescent penetrant
is applied will result in - A decrease in the florescence of the penetrant
Penetrance may be classified or subdivided by the method used to remove excess
penetrate. Which of the following is a proper classification in accordance with the
statement - Water-washable
Which of the following surface contaminants cannot be removed by cleaning ports in a
vapor degreaser - Rust
Which of the following is not a basic inspection principle that applies to all penetrant
methods - Indications glow when illuminated with a black light
Which of the following parts could not be tested by the liquid penetrate method - Apart
made from a porous material
Usually, the most desirable method of removing excess water washable penetrant after
the dwell time is by - A low pressure coarse water spray
The purpose of an emulsifier is to - Combine with the penetrant to make the result
mixture removable by a water rinse
, Which of the following are commonly excepted methods for applying penetrants - 1.
Dipping the part in penetrant (dipping)
2. Pouring the penetrant over the test specimen (flowing)
3. Spraying the penetrate on the test specimen (spraying)
The penetrant applied to the surface of a test specimen - is drawn into discontinuities by
capillary action
When conducting a water washable liquid penetrant test, the web developer is applied -
After removal of the penetrant
Which of the following penetrant methods does not normally require a source of
electricity to properly conduct a test - Visible dye pentrant method
Which of the following penetrant systems is generally considered least sensitive - water
-washable, visible dye.
Black light with a proper functioning filter in place used for fluorescent penetrate
inspection can cause permanent damage to - None of the below
Human tissues, human eyes, human blood cells
Developer assist in the detection of liquid penetrant indications by - Providing a
contrasting background
Which of the following statements is true - If the dryer is too high, the heat may degrade
the effectiveness of the penetrate
Material which when applied over the film of the penetrant on the surface of a part
mixes with the penetrant, and which enables it to be washed off the surface is - An
emulsifier
Black light equipment is required when doing penetrant testing by the - Fluorescent
penetrant method
Liquid penetration testing is capable of detecting - discontinuities open to the surface
The term used to define the tendency of certain liquids to penetrate into small openings
such as cracks or fissures is - Capillary action
When using a web developer - A thin layer of developer is better than a thick layer for
showing very fine cracks
Color contrast penetrants are commercially available in which of the following variations
- 1. Normal solvent clean type
2. Water wash type
3. Post emulsification time
