Page 1 of 138
Pipefitter Star Exam ALL 900 QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS
YEAR
QUESTION: What is the maximum recommended service temperature when a brazed joint is
used? - ANSWER-350 degrees F
QUESTION: Poor alignment of tube joints will cause: - ANSWER-spacing difference between
tubes and fittings
QUESTION: After fittings and tubes are cleaned and fluxed they should be assembled and
soldered: - ANSWER-as soon as possible
QUESTION: Name three basic hitches which can be used for lifting with a sling - ANSWER-
Straight, Choker, Basket
QUESTION: Which hitch can support the most weight? - ANSWER-Basket hitch
1
, Page 2 of 138
QUESTION: Why should the angle between the leg of a sling and the load never be less than 30
degrees? - ANSWER-More stress loads are applied on slings.
QUESTION: What is the weakest part of a chain hoist? - ANSWER-Lower hook
QUESTION: An oxyacetylene flame has a peak temperature of approximately: - ANSWER-6300°F
QUESTION: What is the purpose of slightly opening/cracking a gas cylinder valve before
installing a gas regulator? - ANSWER-clear debris
Q;What causes 90% of all construction injuries and deaths and are used to help OSHA
inspectors improve their effectiveness? - ANSWER-Focus Hazards
QUESTION: What is the minimum safe working distance for overhead power lines? - ANSWER-
10 feet
QUESTION: What is the standard procedure used to safely de-energize equipment on circuits
before they are worked on? - ANSWER-Lockout/Tagout
2
, Page 3 of 138
QUESTION: Which of the following is not true about Material Safety Data Sheets? - ANSWER-
They can be written in any language
QUESTION: What are the four focus inspections OSHA compliance officers look for? - ANSWER-
Fall Hazards, Electrical Hazards, Caught in, Struck by
QUESTION: The sizes of pipe are identified by the measurement called the: - ANSWER-Nominal
pipe size NPS
QUESTION: Steel pipe is supplied with the following end finish (es): - ANSWER-PESC, T & C TBE
(All of the above)
QUESTION: What is a typical type of welded pipe joints? - ANSWER-Butt-welded, Socket-
welded, Slip-on Flanged (All of the above)
3
, Page 4 of 138
QUESTION: List the four principle functions of valves. - ANSWER-Start/Stop, Regulate/Throttle,
Relief, Reduce
QUESTION: Regulating or throttling flow is done with a: - ANSWER-Both B and C, (globe and
gate valve)
QUESTION: Name the two basic types of check valves. - ANSWER-Lift and Swing
QUESTION: The most common hanger used in piping systems is the: - ANSWER-Clevis
QUESTION: Never expose any part of a compressed gas cylinder to temperatures above: -
ANSWER-125°F
QUESTION: The four types of copper tube joints are soldered, brazed, flared and _____? -
ANSWER-compression
4
Pipefitter Star Exam ALL 900 QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS
YEAR
QUESTION: What is the maximum recommended service temperature when a brazed joint is
used? - ANSWER-350 degrees F
QUESTION: Poor alignment of tube joints will cause: - ANSWER-spacing difference between
tubes and fittings
QUESTION: After fittings and tubes are cleaned and fluxed they should be assembled and
soldered: - ANSWER-as soon as possible
QUESTION: Name three basic hitches which can be used for lifting with a sling - ANSWER-
Straight, Choker, Basket
QUESTION: Which hitch can support the most weight? - ANSWER-Basket hitch
1
, Page 2 of 138
QUESTION: Why should the angle between the leg of a sling and the load never be less than 30
degrees? - ANSWER-More stress loads are applied on slings.
QUESTION: What is the weakest part of a chain hoist? - ANSWER-Lower hook
QUESTION: An oxyacetylene flame has a peak temperature of approximately: - ANSWER-6300°F
QUESTION: What is the purpose of slightly opening/cracking a gas cylinder valve before
installing a gas regulator? - ANSWER-clear debris
Q;What causes 90% of all construction injuries and deaths and are used to help OSHA
inspectors improve their effectiveness? - ANSWER-Focus Hazards
QUESTION: What is the minimum safe working distance for overhead power lines? - ANSWER-
10 feet
QUESTION: What is the standard procedure used to safely de-energize equipment on circuits
before they are worked on? - ANSWER-Lockout/Tagout
2
, Page 3 of 138
QUESTION: Which of the following is not true about Material Safety Data Sheets? - ANSWER-
They can be written in any language
QUESTION: What are the four focus inspections OSHA compliance officers look for? - ANSWER-
Fall Hazards, Electrical Hazards, Caught in, Struck by
QUESTION: The sizes of pipe are identified by the measurement called the: - ANSWER-Nominal
pipe size NPS
QUESTION: Steel pipe is supplied with the following end finish (es): - ANSWER-PESC, T & C TBE
(All of the above)
QUESTION: What is a typical type of welded pipe joints? - ANSWER-Butt-welded, Socket-
welded, Slip-on Flanged (All of the above)
3
, Page 4 of 138
QUESTION: List the four principle functions of valves. - ANSWER-Start/Stop, Regulate/Throttle,
Relief, Reduce
QUESTION: Regulating or throttling flow is done with a: - ANSWER-Both B and C, (globe and
gate valve)
QUESTION: Name the two basic types of check valves. - ANSWER-Lift and Swing
QUESTION: The most common hanger used in piping systems is the: - ANSWER-Clevis
QUESTION: Never expose any part of a compressed gas cylinder to temperatures above: -
ANSWER-125°F
QUESTION: The four types of copper tube joints are soldered, brazed, flared and _____? -
ANSWER-compression
4
