Pipefitter Star Exam QUESTIONS WITH VERIFIED
CORRECT ANSWERS (GRADED A+ (Latest
2025/2026)
What is the maximum recommended service temperature when a
brazed joint is used? ✔✔CORRECT ANSWERS✔✔350 degrees F
Poor alignment of tube joints will cause: ✔✔CORRECT
ANSWERS✔✔spacing difference between tubes and fittings
After fittings and tubes are cleaned and fluxed they should be
assembled and soldered: ✔✔CORRECT ANSWERS✔✔as soon as
possible
Name three basic hitches which can be used for lifting with a sling
✔✔CORRECT ANSWERS✔✔Straight, Choker, Basket
Which hitch can support the most weight? ✔✔CORRECT
ANSWERS✔✔Basket hitch
Why should the angle between the leg of a sling and the load never be
less than 30 degrees? ✔✔CORRECT ANSWERS✔✔More stress loads are
applied on slings.
,What is the weakest part of a chain hoist? ✔✔CORRECT
ANSWERS✔✔Lower hook
An oxyacetylene flame has a peak temperature of approximately:
✔✔CORRECT ANSWERS✔✔6300°F
What is the purpose of slightly opening/cracking a gas cylinder valve
before installing a gas regulator? ✔✔CORRECT ANSWERS✔✔clear
debris
Why is it important to ensure that no part of the oxygen handling
equipment comes in contact with oil? ✔✔CORRECT
ANSWERS✔✔causes an explosion
What is the constant used to find the travel with a 45 degree offset?
✔✔CORRECT ANSWERS✔✔1.414
What is the constant used to find the offset or advance with a 45o
offset? ✔✔CORRECT ANSWERS✔✔.707
Add: 5 1/8 + 1 1/4 + 4 ½ = ✔✔CORRECT ANSWERS✔✔10 7/8
Subtract: 9 5/8 - 6 15/16 = ✔✔CORRECT ANSWERS✔✔2 11/16
,Multiply: 3 1/5 x 1 ¼ x 1 1/3 = ✔✔CORRECT ANSWERS✔✔5 1/3
Divide: 11 ¼ by 2 ½ = ✔✔CORRECT ANSWERS✔✔4 1/2
Change the following to architectural measurements 3.96':
✔✔CORRECT ANSWERS✔✔3' - 11 ½"
MSDS is part of the "right to know" law. ✔✔CORRECT ANSWERS✔✔t
IDLH is an individual's daily level of hazards ✔✔CORRECT
ANSWERS✔✔f
Inhalation, ingestion, absorption and injection are four routes of entry.
✔✔CORRECT ANSWERS✔✔t
When voltage is applied to a conductor, free electrons: ✔✔CORRECT
ANSWERS✔✔Are impelled along the conductor
The magnetic field around a current-carrying wire: ✔✔CORRECT
ANSWERS✔✔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 ANSWERS✔✔122.2 ohms
The device used in circuits to prevent damage from overloads is called
a: ✔✔CORRECT ANSWERS✔✔Fuse
A thermocouple: ✔✔CORRECT ANSWERS✔✔Generates a small amount
of voltage when heated
What causes 90% of all construction injuries and deaths and are used to
help OSHA inspectors improve their effectiveness? ✔✔CORRECT
ANSWERS✔✔Focus Hazards
What is the minimum safe working distance for overhead power lines?
✔✔CORRECT ANSWERS✔✔10 feet
What is the standard procedure used to safely de-energize equipment
on circuits before they are worked on? ✔✔CORRECT
ANSWERS✔✔Lockout/Tagout
Which of the following is not true about Material Safety Data Sheets?
✔✔CORRECT ANSWERS✔✔They can be written in any language
CORRECT ANSWERS (GRADED A+ (Latest
2025/2026)
What is the maximum recommended service temperature when a
brazed joint is used? ✔✔CORRECT ANSWERS✔✔350 degrees F
Poor alignment of tube joints will cause: ✔✔CORRECT
ANSWERS✔✔spacing difference between tubes and fittings
After fittings and tubes are cleaned and fluxed they should be
assembled and soldered: ✔✔CORRECT ANSWERS✔✔as soon as
possible
Name three basic hitches which can be used for lifting with a sling
✔✔CORRECT ANSWERS✔✔Straight, Choker, Basket
Which hitch can support the most weight? ✔✔CORRECT
ANSWERS✔✔Basket hitch
Why should the angle between the leg of a sling and the load never be
less than 30 degrees? ✔✔CORRECT ANSWERS✔✔More stress loads are
applied on slings.
,What is the weakest part of a chain hoist? ✔✔CORRECT
ANSWERS✔✔Lower hook
An oxyacetylene flame has a peak temperature of approximately:
✔✔CORRECT ANSWERS✔✔6300°F
What is the purpose of slightly opening/cracking a gas cylinder valve
before installing a gas regulator? ✔✔CORRECT ANSWERS✔✔clear
debris
Why is it important to ensure that no part of the oxygen handling
equipment comes in contact with oil? ✔✔CORRECT
ANSWERS✔✔causes an explosion
What is the constant used to find the travel with a 45 degree offset?
✔✔CORRECT ANSWERS✔✔1.414
What is the constant used to find the offset or advance with a 45o
offset? ✔✔CORRECT ANSWERS✔✔.707
Add: 5 1/8 + 1 1/4 + 4 ½ = ✔✔CORRECT ANSWERS✔✔10 7/8
Subtract: 9 5/8 - 6 15/16 = ✔✔CORRECT ANSWERS✔✔2 11/16
,Multiply: 3 1/5 x 1 ¼ x 1 1/3 = ✔✔CORRECT ANSWERS✔✔5 1/3
Divide: 11 ¼ by 2 ½ = ✔✔CORRECT ANSWERS✔✔4 1/2
Change the following to architectural measurements 3.96':
✔✔CORRECT ANSWERS✔✔3' - 11 ½"
MSDS is part of the "right to know" law. ✔✔CORRECT ANSWERS✔✔t
IDLH is an individual's daily level of hazards ✔✔CORRECT
ANSWERS✔✔f
Inhalation, ingestion, absorption and injection are four routes of entry.
✔✔CORRECT ANSWERS✔✔t
When voltage is applied to a conductor, free electrons: ✔✔CORRECT
ANSWERS✔✔Are impelled along the conductor
The magnetic field around a current-carrying wire: ✔✔CORRECT
ANSWERS✔✔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 ANSWERS✔✔122.2 ohms
The device used in circuits to prevent damage from overloads is called
a: ✔✔CORRECT ANSWERS✔✔Fuse
A thermocouple: ✔✔CORRECT ANSWERS✔✔Generates a small amount
of voltage when heated
What causes 90% of all construction injuries and deaths and are used to
help OSHA inspectors improve their effectiveness? ✔✔CORRECT
ANSWERS✔✔Focus Hazards
What is the minimum safe working distance for overhead power lines?
✔✔CORRECT ANSWERS✔✔10 feet
What is the standard procedure used to safely de-energize equipment
on circuits before they are worked on? ✔✔CORRECT
ANSWERS✔✔Lockout/Tagout
Which of the following is not true about Material Safety Data Sheets?
✔✔CORRECT ANSWERS✔✔They can be written in any language
