PIPEFITTER STAR EXAM ALL 500 QUESTIONS AND
CORRECT DETAILED ANSWERS LATEST UPDATE THIS
YEAR - JUST RELEASED
/. What causes 90% of all construction injuries and deaths and are used to help OSHA
inspectors improve their effectiveness? - Answer-✅Focus Hazards
/.What is the minimum safe working distance for overhead power lines? - Answer-✅10
feet
/.What is the standard procedure used to safely de-energize equipment on circuits
before they are worked on? - Answer-✅Lockout/Tagout
/.Which of the following is not true about Material Safety Data Sheets? - Answer-✅They
can be written in any language
/.What are the four focus inspections OSHA compliance officers look for? - Answer-
✅Fall Hazards, Electrical Hazards, Caught in, Struck by
/.The sizes of pipe are identified by the measurement called the: - Answer-✅Nominal
pipe size NPS
/.Steel pipe is supplied with the following end finish (es): - Answer-✅PESC, T & C TBE
(All of the above)
/.What is a typical type of welded pipe joints? - Answer-✅Butt-welded, Socket-welded,
Slip-on Flanged (All of the above)
/.List the four principle functions of valves. - Answer-✅Start/Stop, Regulate/Throttle,
Relief, Reduce
/.Regulating or throttling flow is done with a: - Answer-✅Both B and C, (globe and gate
valve)
/.Name the two basic types of check valves. - Answer-✅Lift and Swing
/.The most common hanger used in piping systems is the: - Answer-✅Clevis
,/.Never expose any part of a compressed gas cylinder to temperatures above: -
Answer-✅125°F
/.The four types of copper tube joints are soldered, brazed, flared and _____? - Answer-
✅compression
/.What is the maximum recommended service temperature when a brazed joint is used?
- Answer-✅350 degrees F
/.Poor alignment of tube joints will cause: - Answer-✅spacing difference between tubes
and fittings
/.After fittings and tubes are cleaned and fluxed they should be assembled and
soldered: - Answer-✅as soon as possible
/.Name three basic hitches which can be used for lifting with a sling - Answer-✅Straight,
Choker, Basket
/.Which hitch can support the most weight? - Answer-✅Basket hitch
/.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.
/.What is the weakest part of a chain hoist? - Answer-✅Lower hook
/.An oxyacetylene flame has a peak temperature of approximately: - Answer-✅6300°F
/.What is the purpose of slightly opening/cracking a gas cylinder valve before installing a
gas regulator? - Answer-✅clear debris
/.Why is it important to ensure that no part of the oxygen handling equipment comes in
contact with oil? - Answer-✅causes an explosion
/.What is the constant used to find the travel with a 45 degree offset? - Answer-✅1.414
/.What is the constant used to find the offset or advance with a 45o offset? - Answer-
✅.707
/.Add: 5 1/8 + 1 1/4 + 4 ½ = - Answer-✅10 7/8
/.Subtract: 9 5/8 - 6 15/16 = - Answer-✅2 11/16
/.Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - Answer-✅5 1/3
,/.Divide: 11 ¼ by 2 ½ = - Answer-✅4 1/2
/.Change the following to architectural measurements 3.96': - Answer-✅3' - 11 ½"
/.MSDS is part of the "right to know" law. - Answer-✅t
/.IDLH is an individual's daily level of hazards - Answer-✅f
/.Inhalation, ingestion, absorption and injection are four routes of entry. - Answer-✅t
/.When voltage is applied to a conductor, free electrons: - Answer-✅Are impelled along
the conductor
/.The magnetic field around a current-carrying wire: - 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? - Answer-✅122.2 ohms
/.The device used in circuits to prevent damage from overloads is called a: - Answer-
✅Fuse
/.A thermocouple: - Answer-✅Generates a small amount of voltage when heated
/.Sensible heat is defined as: - Answer-✅quantity of heat involved to change a
substance that can be measured with a thermometer
/.Latent heat is defined as: - Answer-✅amount of heat required to bring about a change
in state in a substance
/.Specific heat is defined as: - 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: - Answer-✅is the same
in all directions
/.Pressure is: - Answer-✅force per unit of area
/.Work is defined as: - Answer-✅force times distance
/.Name the two main classifications of pump types. - Answer-✅Positive Displacement
pumps and Non-Positive Displacement pumps
, /.The violent flashing and collapsing of vapor bubbles in a centrifugal pump is called? -
Answer-✅Cavitation
/.What are two kinds of misalignment that must be checked for when installing pumps -
Answer-✅Parallel and Angular alignment
/.What steps should be taken before starting a pump for the first time? - Answer-
✅Prime, Check suction and discharge valves, Check rotation
/.What are two of the three main items shown on a pump curve? - Answer-✅Head in
Feet and GPM
/.Theoretically, how many feet can a pump can raise water vertically by suction? -
Answer-✅34 feet
/.The welder is at most serious and immediate risk of - Answer-✅electrocution
/.The first two digits on welding rod indicate? - Answer-✅tensile strength
/.The next to last digit indicates the ____________ of the weld. - Answer-✅position
/.Utilizing the piping drawing, calculate the measurements for "B": - Answer-✅5' - 5"
/.Utilizing the piping drawing, calculate the measurements for "D": - Answer-✅32' - 3"
/.Utilizing the piping drawing, calculate the measurements for "K": - Answer-✅10' - 8"
/.Utilizing the piping drawing, calculate the measurements for "N": - Answer-✅24' - 2"
/.Utilizing the piping drawing, calculate the measurements for "V": - Answer-✅6' - 8"
/.Utilizing the piping drawing, calculate the measurements for "T": - Answer-✅2' - 0"
/.An increase in pressure will cause the boiling temperature of a liquid to: - Answer-
✅Increase
/.The device that controls the pressure in a low-pressure steam boiler is called a/an: -
Answer-✅Pressuretrol
/.The two basic types of low-water cutoffs are: - Answer-✅Float type and electric probe
type
/.Thermostatic traps are opened and closed by: - Answer-✅A flexible bellows
CORRECT DETAILED ANSWERS LATEST UPDATE THIS
YEAR - JUST RELEASED
/. What causes 90% of all construction injuries and deaths and are used to help OSHA
inspectors improve their effectiveness? - Answer-✅Focus Hazards
/.What is the minimum safe working distance for overhead power lines? - Answer-✅10
feet
/.What is the standard procedure used to safely de-energize equipment on circuits
before they are worked on? - Answer-✅Lockout/Tagout
/.Which of the following is not true about Material Safety Data Sheets? - Answer-✅They
can be written in any language
/.What are the four focus inspections OSHA compliance officers look for? - Answer-
✅Fall Hazards, Electrical Hazards, Caught in, Struck by
/.The sizes of pipe are identified by the measurement called the: - Answer-✅Nominal
pipe size NPS
/.Steel pipe is supplied with the following end finish (es): - Answer-✅PESC, T & C TBE
(All of the above)
/.What is a typical type of welded pipe joints? - Answer-✅Butt-welded, Socket-welded,
Slip-on Flanged (All of the above)
/.List the four principle functions of valves. - Answer-✅Start/Stop, Regulate/Throttle,
Relief, Reduce
/.Regulating or throttling flow is done with a: - Answer-✅Both B and C, (globe and gate
valve)
/.Name the two basic types of check valves. - Answer-✅Lift and Swing
/.The most common hanger used in piping systems is the: - Answer-✅Clevis
,/.Never expose any part of a compressed gas cylinder to temperatures above: -
Answer-✅125°F
/.The four types of copper tube joints are soldered, brazed, flared and _____? - Answer-
✅compression
/.What is the maximum recommended service temperature when a brazed joint is used?
- Answer-✅350 degrees F
/.Poor alignment of tube joints will cause: - Answer-✅spacing difference between tubes
and fittings
/.After fittings and tubes are cleaned and fluxed they should be assembled and
soldered: - Answer-✅as soon as possible
/.Name three basic hitches which can be used for lifting with a sling - Answer-✅Straight,
Choker, Basket
/.Which hitch can support the most weight? - Answer-✅Basket hitch
/.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.
/.What is the weakest part of a chain hoist? - Answer-✅Lower hook
/.An oxyacetylene flame has a peak temperature of approximately: - Answer-✅6300°F
/.What is the purpose of slightly opening/cracking a gas cylinder valve before installing a
gas regulator? - Answer-✅clear debris
/.Why is it important to ensure that no part of the oxygen handling equipment comes in
contact with oil? - Answer-✅causes an explosion
/.What is the constant used to find the travel with a 45 degree offset? - Answer-✅1.414
/.What is the constant used to find the offset or advance with a 45o offset? - Answer-
✅.707
/.Add: 5 1/8 + 1 1/4 + 4 ½ = - Answer-✅10 7/8
/.Subtract: 9 5/8 - 6 15/16 = - Answer-✅2 11/16
/.Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - Answer-✅5 1/3
,/.Divide: 11 ¼ by 2 ½ = - Answer-✅4 1/2
/.Change the following to architectural measurements 3.96': - Answer-✅3' - 11 ½"
/.MSDS is part of the "right to know" law. - Answer-✅t
/.IDLH is an individual's daily level of hazards - Answer-✅f
/.Inhalation, ingestion, absorption and injection are four routes of entry. - Answer-✅t
/.When voltage is applied to a conductor, free electrons: - Answer-✅Are impelled along
the conductor
/.The magnetic field around a current-carrying wire: - 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? - Answer-✅122.2 ohms
/.The device used in circuits to prevent damage from overloads is called a: - Answer-
✅Fuse
/.A thermocouple: - Answer-✅Generates a small amount of voltage when heated
/.Sensible heat is defined as: - Answer-✅quantity of heat involved to change a
substance that can be measured with a thermometer
/.Latent heat is defined as: - Answer-✅amount of heat required to bring about a change
in state in a substance
/.Specific heat is defined as: - 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: - Answer-✅is the same
in all directions
/.Pressure is: - Answer-✅force per unit of area
/.Work is defined as: - Answer-✅force times distance
/.Name the two main classifications of pump types. - Answer-✅Positive Displacement
pumps and Non-Positive Displacement pumps
, /.The violent flashing and collapsing of vapor bubbles in a centrifugal pump is called? -
Answer-✅Cavitation
/.What are two kinds of misalignment that must be checked for when installing pumps -
Answer-✅Parallel and Angular alignment
/.What steps should be taken before starting a pump for the first time? - Answer-
✅Prime, Check suction and discharge valves, Check rotation
/.What are two of the three main items shown on a pump curve? - Answer-✅Head in
Feet and GPM
/.Theoretically, how many feet can a pump can raise water vertically by suction? -
Answer-✅34 feet
/.The welder is at most serious and immediate risk of - Answer-✅electrocution
/.The first two digits on welding rod indicate? - Answer-✅tensile strength
/.The next to last digit indicates the ____________ of the weld. - Answer-✅position
/.Utilizing the piping drawing, calculate the measurements for "B": - Answer-✅5' - 5"
/.Utilizing the piping drawing, calculate the measurements for "D": - Answer-✅32' - 3"
/.Utilizing the piping drawing, calculate the measurements for "K": - Answer-✅10' - 8"
/.Utilizing the piping drawing, calculate the measurements for "N": - Answer-✅24' - 2"
/.Utilizing the piping drawing, calculate the measurements for "V": - Answer-✅6' - 8"
/.Utilizing the piping drawing, calculate the measurements for "T": - Answer-✅2' - 0"
/.An increase in pressure will cause the boiling temperature of a liquid to: - Answer-
✅Increase
/.The device that controls the pressure in a low-pressure steam boiler is called a/an: -
Answer-✅Pressuretrol
/.The two basic types of low-water cutoffs are: - Answer-✅Float type and electric probe
type
/.Thermostatic traps are opened and closed by: - Answer-✅A flexible bellows
