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 inspectors improve their effectiveness? - CORRECT ANSWER 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? -
CORRECT ANSWER 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): - CORRECT ANSWER
PESC, T & C TBE
(All of the above)
,What is a typical type of welded pipe joints? - CORRECT ANSWER Butt-
welded, Socket-welded, Slip-on Flanged (All of the above)
List the four principle functions of valves. - CORRECT ANSWER Start/Stop,
Regulate/Throttle, Relief, Reduce
Regulating or throttling flow is done with a: - CORRECT ANSWER Both B and
C, (globe and gate valve)
Name the two basic types of check valves. - CORRECT ANSWER Lift and
Swing
The most common hanger used in piping systems is the: - CORRECT ANSWER
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: - CORRECT ANSWER 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? - CORRECT ANSWER 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? - CORRECT ANSWER 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 = - CORRECT ANSWER 10 7/8
, Subtract: 9 5/8 - 6 15/16 = - CORRECT ANSWER 2 11/16
Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - CORRECT ANSWER 5 1/3
Divide: 11 ¼ by 2 ½ = - CORRECT ANSWER 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. - CORRECT ANSWER t
IDLH is an individual's daily level of hazards - CORRECT ANSWER f
Inhalation, ingestion, absorption and injection are four routes of entry. -
CORRECT ANSWER t
When voltage is applied to a conductor, free electrons: - CORRECT ANSWER
Are impelled along the conductor
The magnetic field around a current-carrying wire: - CORRECT ANSWER 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
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? - CORRECT ANSWER 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? -
CORRECT ANSWER 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): - CORRECT ANSWER
PESC, T & C TBE
(All of the above)
,What is a typical type of welded pipe joints? - CORRECT ANSWER Butt-
welded, Socket-welded, Slip-on Flanged (All of the above)
List the four principle functions of valves. - CORRECT ANSWER Start/Stop,
Regulate/Throttle, Relief, Reduce
Regulating or throttling flow is done with a: - CORRECT ANSWER Both B and
C, (globe and gate valve)
Name the two basic types of check valves. - CORRECT ANSWER Lift and
Swing
The most common hanger used in piping systems is the: - CORRECT ANSWER
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: - CORRECT ANSWER 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? - CORRECT ANSWER 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? - CORRECT ANSWER 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 = - CORRECT ANSWER 10 7/8
, Subtract: 9 5/8 - 6 15/16 = - CORRECT ANSWER 2 11/16
Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - CORRECT ANSWER 5 1/3
Divide: 11 ¼ by 2 ½ = - CORRECT ANSWER 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. - CORRECT ANSWER t
IDLH is an individual's daily level of hazards - CORRECT ANSWER f
Inhalation, ingestion, absorption and injection are four routes of entry. -
CORRECT ANSWER t
When voltage is applied to a conductor, free electrons: - CORRECT ANSWER
Are impelled along the conductor
The magnetic field around a current-carrying wire: - CORRECT ANSWER 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
