PIPEFITTER STAR EXAM QUESTIONS AND ANSWERS
ALREADY GRADE A+ LATEST UPDATE 2025-2026
What causes 90% of all construction injuries and deaths and are used to help OSHA
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inspectors improve their effectiveness? - CORRECTANSWER Focus Hazards
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What is the minimum safe working distance for overhead power lines? - CORRECT
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ANSWER 10 feet
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What is the standard procedure used to safely de-energize equipment on circuits
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before they are worked on? - CORRECT ANSWER Lockout/Tagout
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Which of the following is not true about Material Safety Data Sheets? - CORRECT
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ANSWER They can be written in any language
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What are the four focus inspections OSHA compliance officers look for? -
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CORRECTANSWER Fall Hazards, Electrical Hazards, Caught in, Struck by
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The sizes of pipe are identified by the measurement called the: - CORRECT
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ANSWER Nominal pipe size NPS
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Steel pipe is supplied with the following end finish (es): - CORRECTANSWER
| | | | | | | | | | | |
PESC, T & C TBE | | | |
(All of the above)
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,What is a typical type of welded pipe joints? - CORRECTANSWER Butt- welded,
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Socket-welded, Slip-on Flanged (All of the above)
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List the four principle functions of valves. - CORRECTANSWER Start/Stop,
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Regulate/Throttle, Relief, Reduce
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Regulating or throttling flow is done with a: - CORRECTANSWER Both B and C,
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(globe and gate valve)
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Name the two basic types of check valves. - CORRECTANSWER Lift and Swing
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The most common hanger used in piping systems is the: - CORRECTANSWER
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Clevis
Never expose any part of a compressed gas cylinder to temperatures above: -
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CORRECT ANSWER 125°F
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The four types of copper tube joints are soldered, brazed, flared and
| | | | | | | | | | | | ?- |
CORRECT ANSWER compression
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What is the maximum recommended service temperature when a brazed joint is used?
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- CORRECT ANSWER 350 degrees F
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Poor alignment of tube joints will cause: - CORRECTANSWER spacing difference
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between tubes and fittings
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After fittings and tubes are cleaned and fluxed they should be assembled and
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soldered: - CORRECT ANSWER as soon as possible
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,Name three basic hitches which can be used for lifting with a sling - CORRECT
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ANSWER Straight, Choker, Basket
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Which hitch can support the most weight? - CORRECTANSWER Basket hitch
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Why should the angle between the leg of a sling and the load never be less than 30
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degrees? - CORRECT ANSWER More stress loads are applied on slings.
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What is the weakest part of a chain hoist? - CORRECTANSWER Lower hook
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An oxyacetylene flame has a peak temperature of approximately: - CORRECT
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ANSWER 6300°F
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What is the purpose of slightly opening/cracking a gas cylinder valve before installing
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a gas regulator? - CORRECT ANSWER clear debris
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Why is it important to ensure that no part of the oxygen handling equipment comes in
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contact with oil? - CORRECT ANSWER causes an explosion
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What is the constant used to find the travel with a 45 degree offset? - CORRECT
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ANSWER 1.414
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What is the constant used to find the offset or advance with a 45o offset? -
| | | | | | | | | | | | | | |
CORRECT ANSWER .707
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Add: 5 1/8 + 1 1/4 + 4 ½ = - CORRECTANSWER 10 7/8
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, Subtract: 9 5/8 - 6 15/16 = - CORRECTANSWER 2 11/16
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Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - CORRECTANSWER 5 1/3
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Divide: 11 ¼ by 2 ½ = - CORRECTANSWER 4 1/2
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Change the following to architectural measurements 3.96': - CORRECT ANSWER
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3' - 11 ½"
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MSDS is part of the "right to know" law. - CORRECTANSWER t
| | | | | | | | | | | |
IDLH is an individual's daily level of hazards - CORRECTANSWER f
| | | | | | | | | | |
Inhalation, ingestion, absorption and injection are four routes of entry. - CORRECT
| | | | | | | | | | |
ANSWER t
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When voltage is applied to a conductor, free electrons: - CORRECTANSWER
| | | | | | | | | | |
Are impelled along the conductor
| | | |
The magnetic field around a current-carrying wire: - CORRECTANSWER Exists at
| | | | | | | | | | |
all points along its length
| | | | |
A lamp has a source of 110 volts and current of 0.9 amps, what is the resistance of the
| | | | | | | | | | | | | | | | | |
lamp? - CORRECT ANSWER 122.2 ohms
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The device used in circuits to prevent damage from overloads is called a: -
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CORRECT ANSWER Fuse
| | |
ALREADY GRADE A+ LATEST UPDATE 2025-2026
What causes 90% of all construction injuries and deaths and are used to help OSHA
| | | | | | | | | | | | | |
inspectors improve their effectiveness? - CORRECTANSWER Focus Hazards
| | | | | | | | |
What is the minimum safe working distance for overhead power lines? - CORRECT
| | | | | | | | | | | |
ANSWER 10 feet
| | |
What is the standard procedure used to safely de-energize equipment on circuits
| | | | | | | | | | |
before they are worked on? - CORRECT ANSWER Lockout/Tagout
| | | | | | | | |
Which of the following is not true about Material Safety Data Sheets? - CORRECT
| | | | | | | | | | | | |
ANSWER They can be written in any language
| | | | | | | |
What are the four focus inspections OSHA compliance officers look for? -
| | | | | | | | | | |
CORRECTANSWER Fall Hazards, Electrical Hazards, Caught in, Struck by
| | | | | | | | |
The sizes of pipe are identified by the measurement called the: - CORRECT
| | | | | | | | | | | |
ANSWER Nominal pipe size NPS
| | | | |
Steel pipe is supplied with the following end finish (es): - CORRECTANSWER
| | | | | | | | | | | |
PESC, T & C TBE | | | |
(All of the above)
| | |
,What is a typical type of welded pipe joints? - CORRECTANSWER Butt- welded,
| | | | | | | | | | | | |
Socket-welded, Slip-on Flanged (All of the above)
| | | | | | |
List the four principle functions of valves. - CORRECTANSWER Start/Stop,
| | | | | | | | | |
Regulate/Throttle, Relief, Reduce
| | |
Regulating or throttling flow is done with a: - CORRECTANSWER Both B and C,
| | | | | | | | | | | | | |
(globe and gate valve)
| | | |
Name the two basic types of check valves. - CORRECTANSWER Lift and Swing
| | | | | | | | | | | | |
The most common hanger used in piping systems is the: - CORRECTANSWER
| | | | | | | | | | | |
Clevis
Never expose any part of a compressed gas cylinder to temperatures above: -
| | | | | | | | | | | |
CORRECT ANSWER 125°F
| | |
The four types of copper tube joints are soldered, brazed, flared and
| | | | | | | | | | | | ?- |
CORRECT ANSWER compression
| | |
What is the maximum recommended service temperature when a brazed joint is used?
| | | | | | | | | | | |
- CORRECT ANSWER 350 degrees F
| | | | | |
Poor alignment of tube joints will cause: - CORRECTANSWER spacing difference
| | | | | | | | | | |
between tubes and fittings
| | | |
After fittings and tubes are cleaned and fluxed they should be assembled and
| | | | | | | | | | | |
soldered: - CORRECT ANSWER as soon as possible
| | | | | | | |
,Name three basic hitches which can be used for lifting with a sling - CORRECT
| | | | | | | | | | | | | |
ANSWER Straight, Choker, Basket
| | | |
Which hitch can support the most weight? - CORRECTANSWER Basket hitch
| | | | | | | | | | |
Why should the angle between the leg of a sling and the load never be less than 30
| | | | | | | | | | | | | | | | |
degrees? - CORRECT ANSWER More stress loads are applied on slings.
| | | | | | | | | | |
What is the weakest part of a chain hoist? - CORRECTANSWER Lower hook
| | | | | | | | | | | | |
An oxyacetylene flame has a peak temperature of approximately: - CORRECT
| | | | | | | | | |
ANSWER 6300°F
| |
What is the purpose of slightly opening/cracking a gas cylinder valve before installing
| | | | | | | | | | | |
a gas regulator? - CORRECT ANSWER clear debris
| | | | | | | |
Why is it important to ensure that no part of the oxygen handling equipment comes in
| | | | | | | | | | | | | | |
contact with oil? - CORRECT ANSWER causes an explosion
| | | | | | | | |
What is the constant used to find the travel with a 45 degree offset? - CORRECT
| | | | | | | | | | | | | | |
ANSWER 1.414
| |
What is the constant used to find the offset or advance with a 45o offset? -
| | | | | | | | | | | | | | |
CORRECT ANSWER .707
| | |
Add: 5 1/8 + 1 1/4 + 4 ½ = - CORRECTANSWER 10 7/8
| | | | | | | | | | | | | |
, Subtract: 9 5/8 - 6 15/16 = - CORRECTANSWER 2 11/16
| | | | | | | | | | |
Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - CORRECTANSWER 5 1/3
| | | | | | | | | | | | | |
Divide: 11 ¼ by 2 ½ = - CORRECTANSWER 4 1/2
| | | | | | | | | | |
Change the following to architectural measurements 3.96': - CORRECT ANSWER
| | | | | | | | |
3' - 11 ½"
| | | |
MSDS is part of the "right to know" law. - CORRECTANSWER t
| | | | | | | | | | | |
IDLH is an individual's daily level of hazards - CORRECTANSWER f
| | | | | | | | | | |
Inhalation, ingestion, absorption and injection are four routes of entry. - CORRECT
| | | | | | | | | | |
ANSWER t
| |
When voltage is applied to a conductor, free electrons: - CORRECTANSWER
| | | | | | | | | | |
Are impelled along the conductor
| | | |
The magnetic field around a current-carrying wire: - CORRECTANSWER Exists at
| | | | | | | | | | |
all points along its length
| | | | |
A lamp has a source of 110 volts and current of 0.9 amps, what is the resistance of the
| | | | | | | | | | | | | | | | | |
lamp? - CORRECT ANSWER 122.2 ohms
| | | | | |
The device used in circuits to prevent damage from overloads is called a: -
| | | | | | | | | | | | |
CORRECT ANSWER Fuse
| | |
