PIPEFITTER STAR EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ 2025 – 2026
Lack of lubrication of a compressor may be caused by: -
ANSWERS-refrigerant returning as a slug
The high side of the vapor compression refrigeration cycle
contains the: - ANSWERS-condenser
Liquid sight glasses are used on ______ refrigeration
systems. - ANSWERS-all
Moisture in a refrigeration system will cause: - ANSWERS-
sludge, acids, corrosion, all of the above
A living room in a house is kept at 70 degrees F. When it is
20 degrees F outdoors, which item(s) below demonstrate
,heat flowing "downhill"? - ANSWERS-heat flows from the
indoor air to the outside wall,
What are the four focus inspections OSHA compliance
officers look for? - ANSWERS-Fall Hazards, Electrical
Hazards, Caught in, Struck by
The sizes of pipe are identified by the measurement called
the: - ANSWERS-Nominal pipe size NPS
Steel pipe is supplied with the following end finish (es): -
ANSWERS-PESC, T & C TBE
(All of the above)
What is a typical type of welded pipe joints? - ANSWERS-
Butt-welded, Socket-welded, Slip-on Flanged (All of the
above)
List the four principle functions of valves. - ANSWERS-
Start/Stop, Regulate/Throttle, Relief, Reduce
Regulating or throttling flow is done with a: - ANSWERS-
Both B and C, (globe and gate valve)
,Name the two basic types of check valves. - ANSWERS-Lift
and Swing
The most common hanger used in piping systems is the: -
ANSWERS-Clevis
Never expose any part of a compressed gas cylinder to
temperatures above: - ANSWERS-125°F
The four types of copper tube joints are soldered, brazed,
flared and _____? - ANSWERS-compression
What is the maximum recommended service temperature
when a brazed joint is used? - ANSWERS-350 degrees F
Poor alignment of tube joints will cause: - ANSWERS-spacing
difference between tubes and fittings
After fittings and tubes are cleaned and fluxed they should
be assembled and soldered: - ANSWERS-as soon as possible
, Name three basic hitches which can be used for lifting with
a sling - ANSWERS-Straight, Choker, Basket
Which hitch can support the most weight? - ANSWERS-
Basket hitch
Why should the angle between the leg of a sling and the
load never be less than 30 degrees? - ANSWERS-More stress
loads are applied on slings.
What is the weakest part of a chain hoist? - ANSWERS-
Lower hook
An oxyacetylene flame has a peak temperature of
approximately: - ANSWERS-6300°F
What is the purpose of slightly opening/cracking a gas
cylinder valve before installing a gas regulator? - ANSWERS-
clear debris
Why is it important to ensure that no part of the oxygen
handling equipment comes in contact with oil? - ANSWERS-
causes an explosion
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ 2025 – 2026
Lack of lubrication of a compressor may be caused by: -
ANSWERS-refrigerant returning as a slug
The high side of the vapor compression refrigeration cycle
contains the: - ANSWERS-condenser
Liquid sight glasses are used on ______ refrigeration
systems. - ANSWERS-all
Moisture in a refrigeration system will cause: - ANSWERS-
sludge, acids, corrosion, all of the above
A living room in a house is kept at 70 degrees F. When it is
20 degrees F outdoors, which item(s) below demonstrate
,heat flowing "downhill"? - ANSWERS-heat flows from the
indoor air to the outside wall,
What are the four focus inspections OSHA compliance
officers look for? - ANSWERS-Fall Hazards, Electrical
Hazards, Caught in, Struck by
The sizes of pipe are identified by the measurement called
the: - ANSWERS-Nominal pipe size NPS
Steel pipe is supplied with the following end finish (es): -
ANSWERS-PESC, T & C TBE
(All of the above)
What is a typical type of welded pipe joints? - ANSWERS-
Butt-welded, Socket-welded, Slip-on Flanged (All of the
above)
List the four principle functions of valves. - ANSWERS-
Start/Stop, Regulate/Throttle, Relief, Reduce
Regulating or throttling flow is done with a: - ANSWERS-
Both B and C, (globe and gate valve)
,Name the two basic types of check valves. - ANSWERS-Lift
and Swing
The most common hanger used in piping systems is the: -
ANSWERS-Clevis
Never expose any part of a compressed gas cylinder to
temperatures above: - ANSWERS-125°F
The four types of copper tube joints are soldered, brazed,
flared and _____? - ANSWERS-compression
What is the maximum recommended service temperature
when a brazed joint is used? - ANSWERS-350 degrees F
Poor alignment of tube joints will cause: - ANSWERS-spacing
difference between tubes and fittings
After fittings and tubes are cleaned and fluxed they should
be assembled and soldered: - ANSWERS-as soon as possible
, Name three basic hitches which can be used for lifting with
a sling - ANSWERS-Straight, Choker, Basket
Which hitch can support the most weight? - ANSWERS-
Basket hitch
Why should the angle between the leg of a sling and the
load never be less than 30 degrees? - ANSWERS-More stress
loads are applied on slings.
What is the weakest part of a chain hoist? - ANSWERS-
Lower hook
An oxyacetylene flame has a peak temperature of
approximately: - ANSWERS-6300°F
What is the purpose of slightly opening/cracking a gas
cylinder valve before installing a gas regulator? - ANSWERS-
clear debris
Why is it important to ensure that no part of the oxygen
handling equipment comes in contact with oil? - ANSWERS-
causes an explosion
