PIPEFITTER STAR EXAM COMPLETE 500 QUESTIONS AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR

Page 1 of 111



PIPEFITTER STAR EXAM COMPLETE 500 QUESTIONS
AND DETAILED SOLUTIONS 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




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.




1

,Page 2 of 111


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




QUESTION: Why is it important to ensure that no part of the oxygen handling equipment comes
in contact with oil? - ANSWER-causes an explosion




QUESTION: What is the constant used to find the travel with a 45 degree offset? - ANSWER-
1.414




QUESTION: What is the constant used to find the offset or advance with a 45o offset? -
ANSWER-.707




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


2

,Page 3 of 111




QUESTION: What is the standard procedure used to safely de-energize equipment on circuits
before they are worked on? - ANSWER-Lockout/Tagout




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)




QUESTION: List the four principle functions of valves. - ANSWER-Start/Stop, Regulate/Throttle,
Relief, Reduce


3

, Page 4 of 111




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




QUESTION: Add: 5 1/8 + 1 1/4 + 4 ½ = - ANSWER-10 7/8




QUESTION: Subtract: 9 5/8 - 6 15/16 = - ANSWER-2 11/16




QUESTION: Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - ANSWER-5 1/3




4