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PIPEFITTER STAR EXAM QUESTIONS AND CORRECT
ANSWERS | LATEST UPDATED 2026/2027 WITH VERIFIED
SOLUTIONS | ASSURED PASS | GRADED A+.
What is the minimum safe working distance for overhead power lines? -
ANSWER: 10 feet
What causes 90% of all construction injuries and deaths and are used to help
OSHA inspectors improve their effectiveness? - ANSWER: Focus Hazards
What is the standard procedure used to safely de-energize equipment on circuits
before they are worked on? - ANSWER: Lockout/Tagout
Which of the following is not true about Material Safety Data Sheets? -
ANSWER: They can be written in any language
What are the four focus inspections OSHA compliance officers look for? -
ANSWER: Fall Hazards, Electrical Hazards, Caught in, Struck by
The sizes of pipe are identified by the measurement called the: - ANSWER:
Nominal pipe size NPS
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Steel pipe is supplied with the following end finish (es): - ANSWER: PESC, T &
C TBE
(All of the above)
Regulating or throttling flow is done with a: - ANSWER: Both B and C, (globe
and gate valve)
Violent flashing and collapsing of vapor bubbles in a centrifugal pump is called. -
ANSWER: Cavitation
Device that controls the pressure in a low pressure steam boiler - ANSWER:
Pressuretrol
Function of an evaporator - ANSWER: Absorb heat from the system
Metal which has a high iron content - ANSWER: ferrous
Why should the angle between the leg of a swing and the load never be less than
30 degrees? - ANSWER: More stress loads are applied on the sling
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What are two kinds of misalignment that must be checked for when installing
pumps? - ANSWER: Parallel and angular alignment
What is the function of a compressor? - ANSWER: Create flow in the system
What is a typical type of welded pipe joints? - ANSWER: Butt-welded,
Socketwelded, Slip-on Flanged (All of the above)
List the four principle functions of valves. - ANSWER: Start/Stop,
Regulate/Throttle, Relief, Reduce
After fittings and tubes are cleaned and fluxed, they should be assembled and
soldered - ANSWER: As soon as possible
The relief valve is sized to the ________ rating of a boiler - ANSWER: Gross
Output
Four types of copper tube joints - ANSWER: Soldered, Brazed, Flared,
Compression
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Most common hanger type - ANSWER: Clevis
Amount of heat required to bring about a change in a state in a substance -
ANSWER: Latent heat
Harmful products of incomplete combustion - ANSWER: Carbon Monoxide &
Aldehydes
Regulating or throttling flow is done with - ANSWER: Globe
4 main components in a refrigeration system - ANSWER: Compressor, Condenser,
Evaporator, Metering device.
Quanting of heat involved to change a substance that can be measured with a
thermometer - ANSWER: Sensible heat
Main advantage of a fluidized bed boiler - ANSWER: Low SO & NOx emissions
Two basic types of low-water cutoffs - ANSWER: Float type and electric probe
Measurement unit used to express rate of flow - ANSWER: Velocity
PIPEFITTER STAR EXAM QUESTIONS AND CORRECT
ANSWERS | LATEST UPDATED 2026/2027 WITH VERIFIED
SOLUTIONS | ASSURED PASS | GRADED A+.
What is the minimum safe working distance for overhead power lines? -
ANSWER: 10 feet
What causes 90% of all construction injuries and deaths and are used to help
OSHA inspectors improve their effectiveness? - ANSWER: Focus Hazards
What is the standard procedure used to safely de-energize equipment on circuits
before they are worked on? - ANSWER: Lockout/Tagout
Which of the following is not true about Material Safety Data Sheets? -
ANSWER: They can be written in any language
What are the four focus inspections OSHA compliance officers look for? -
ANSWER: Fall Hazards, Electrical Hazards, Caught in, Struck by
The sizes of pipe are identified by the measurement called the: - ANSWER:
Nominal pipe size NPS
,2|Page
Steel pipe is supplied with the following end finish (es): - ANSWER: PESC, T &
C TBE
(All of the above)
Regulating or throttling flow is done with a: - ANSWER: Both B and C, (globe
and gate valve)
Violent flashing and collapsing of vapor bubbles in a centrifugal pump is called. -
ANSWER: Cavitation
Device that controls the pressure in a low pressure steam boiler - ANSWER:
Pressuretrol
Function of an evaporator - ANSWER: Absorb heat from the system
Metal which has a high iron content - ANSWER: ferrous
Why should the angle between the leg of a swing and the load never be less than
30 degrees? - ANSWER: More stress loads are applied on the sling
,3|Page
What are two kinds of misalignment that must be checked for when installing
pumps? - ANSWER: Parallel and angular alignment
What is the function of a compressor? - ANSWER: Create flow in the system
What is a typical type of welded pipe joints? - ANSWER: Butt-welded,
Socketwelded, Slip-on Flanged (All of the above)
List the four principle functions of valves. - ANSWER: Start/Stop,
Regulate/Throttle, Relief, Reduce
After fittings and tubes are cleaned and fluxed, they should be assembled and
soldered - ANSWER: As soon as possible
The relief valve is sized to the ________ rating of a boiler - ANSWER: Gross
Output
Four types of copper tube joints - ANSWER: Soldered, Brazed, Flared,
Compression
, 4|Page
Most common hanger type - ANSWER: Clevis
Amount of heat required to bring about a change in a state in a substance -
ANSWER: Latent heat
Harmful products of incomplete combustion - ANSWER: Carbon Monoxide &
Aldehydes
Regulating or throttling flow is done with - ANSWER: Globe
4 main components in a refrigeration system - ANSWER: Compressor, Condenser,
Evaporator, Metering device.
Quanting of heat involved to change a substance that can be measured with a
thermometer - ANSWER: Sensible heat
Main advantage of a fluidized bed boiler - ANSWER: Low SO & NOx emissions
Two basic types of low-water cutoffs - ANSWER: Float type and electric probe
Measurement unit used to express rate of flow - ANSWER: Velocity
