Pipefitter Star Exam Most Recent exam COMPLETE (2026) EXAM
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Questions and Answers (Verified Answers) (Latest Update 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
EXAMPREPMASTER
, 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
Page | 2
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
EXAMPREPMASTER
, Divide: 11 ¼ by 2 ½ = - CORRECT ANSWER ✔✔✔✔✔ 4 1/2
Change the following to architectural measurements 3.96': - CORRECT ANSWER
✔✔✔✔✔ 3' - 11 ½"
Page | 3
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
A thermocouple: - CORRECT ANSWER ✔✔✔✔✔ Generates a small amount of voltage
when heated
Sensible heat is defined as: - CORRECT ANSWER ✔✔✔✔✔ quantity of heat involved to
change a substance that can be measured with a thermometer
Latent heat is defined as: - CORRECT ANSWER ✔✔✔✔✔ amount of heat required to
bring about a change in state in a substance
Specific heat is defined as: - CORRECT ANSWER ✔✔✔✔✔ amount of heat in BTU's
required to change the temperature of 1 pound of a substance 1oF.
The pressure at a certain depth below the surface of a liquid: - CORRECT ANSWER
✔✔✔✔✔ is the same in all directions
Pressure is: - CORRECT ANSWER ✔✔✔✔✔ force per unit of area
Work is defined as: - CORRECT ANSWER ✔✔✔✔✔ force times distance
EXAMPREPMASTER
, Name the two main classifications of pump types. - CORRECT ANSWER ✔✔✔✔✔
Positive Displacement pumps and Non-Positive Displacement pumps
The violent flashing and collapsing of vapor bubbles in a centrifugal pump is called? -
CORRECT ANSWER ✔✔✔✔✔ Cavitation
Page | 4
What are two kinds of misalignment that must be checked for when installing pumps -
CORRECT ANSWER ✔✔✔✔✔ Parallel and Angular alignment
What steps should be taken before starting a pump for the first time? - CORRECT
ANSWER ✔✔✔✔✔ Prime, Check suction and discharge valves, Check rotation
What are two of the three main items shown on a pump curve? - CORRECT ANSWER
✔✔✔✔✔ Head in Feet and GPM
Theoretically, how many feet can a pump can raise water vertically by suction? -
CORRECT ANSWER ✔✔✔✔✔ 34 feet
The welder is at most serious and immediate risk of - CORRECT ANSWER ✔✔✔✔✔
electrocution
The first two digits on welding rod indicate? - CORRECT ANSWER ✔✔✔✔✔ tensile
strength
The next to last digit indicates the ____________ of the weld. - CORRECT ANSWER
✔✔✔✔✔ position
Utilizing the piping drawing, calculate the measurements for "B": - CORRECT ANSWER
✔✔✔✔✔ 5' - 5"
Utilizing the piping drawing, calculate the measurements for "D": - CORRECT ANSWER
✔✔✔✔✔ 32' - 3"
Utilizing the piping drawing, calculate the measurements for "K": - CORRECT ANSWER
✔✔✔✔✔ 10' - 8"
Utilizing the piping drawing, calculate the measurements for "N": - CORRECT ANSWER
✔✔✔✔✔ 24' - 2"
Utilizing the piping drawing, calculate the measurements for "V": - CORRECT ANSWER
✔✔✔✔✔ 6' - 8"
Utilizing the piping drawing, calculate the measurements for "T": - CORRECT ANSWER
✔✔✔✔✔ 2' - 0"
EXAMPREPMASTER
Page | 1
Questions and Answers (Verified Answers) (Latest Update 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
EXAMPREPMASTER
, 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
Page | 2
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
EXAMPREPMASTER
, Divide: 11 ¼ by 2 ½ = - CORRECT ANSWER ✔✔✔✔✔ 4 1/2
Change the following to architectural measurements 3.96': - CORRECT ANSWER
✔✔✔✔✔ 3' - 11 ½"
Page | 3
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
A thermocouple: - CORRECT ANSWER ✔✔✔✔✔ Generates a small amount of voltage
when heated
Sensible heat is defined as: - CORRECT ANSWER ✔✔✔✔✔ quantity of heat involved to
change a substance that can be measured with a thermometer
Latent heat is defined as: - CORRECT ANSWER ✔✔✔✔✔ amount of heat required to
bring about a change in state in a substance
Specific heat is defined as: - CORRECT ANSWER ✔✔✔✔✔ amount of heat in BTU's
required to change the temperature of 1 pound of a substance 1oF.
The pressure at a certain depth below the surface of a liquid: - CORRECT ANSWER
✔✔✔✔✔ is the same in all directions
Pressure is: - CORRECT ANSWER ✔✔✔✔✔ force per unit of area
Work is defined as: - CORRECT ANSWER ✔✔✔✔✔ force times distance
EXAMPREPMASTER
, Name the two main classifications of pump types. - CORRECT ANSWER ✔✔✔✔✔
Positive Displacement pumps and Non-Positive Displacement pumps
The violent flashing and collapsing of vapor bubbles in a centrifugal pump is called? -
CORRECT ANSWER ✔✔✔✔✔ Cavitation
Page | 4
What are two kinds of misalignment that must be checked for when installing pumps -
CORRECT ANSWER ✔✔✔✔✔ Parallel and Angular alignment
What steps should be taken before starting a pump for the first time? - CORRECT
ANSWER ✔✔✔✔✔ Prime, Check suction and discharge valves, Check rotation
What are two of the three main items shown on a pump curve? - CORRECT ANSWER
✔✔✔✔✔ Head in Feet and GPM
Theoretically, how many feet can a pump can raise water vertically by suction? -
CORRECT ANSWER ✔✔✔✔✔ 34 feet
The welder is at most serious and immediate risk of - CORRECT ANSWER ✔✔✔✔✔
electrocution
The first two digits on welding rod indicate? - CORRECT ANSWER ✔✔✔✔✔ tensile
strength
The next to last digit indicates the ____________ of the weld. - CORRECT ANSWER
✔✔✔✔✔ position
Utilizing the piping drawing, calculate the measurements for "B": - CORRECT ANSWER
✔✔✔✔✔ 5' - 5"
Utilizing the piping drawing, calculate the measurements for "D": - CORRECT ANSWER
✔✔✔✔✔ 32' - 3"
Utilizing the piping drawing, calculate the measurements for "K": - CORRECT ANSWER
✔✔✔✔✔ 10' - 8"
Utilizing the piping drawing, calculate the measurements for "N": - CORRECT ANSWER
✔✔✔✔✔ 24' - 2"
Utilizing the piping drawing, calculate the measurements for "V": - CORRECT ANSWER
✔✔✔✔✔ 6' - 8"
Utilizing the piping drawing, calculate the measurements for "T": - CORRECT ANSWER
✔✔✔✔✔ 2' - 0"
EXAMPREPMASTER
