1|Page
PIPEFITTER STAR EXAM PART 1 QUESTIONS
AND CORRECT ANSWERS| LATEST UPDATED
VERSION WITH VERIFIED SOLUTIONS -
ASSURED PASS
Violent flashing and collapsing of vapor bubbles in a centrifugal pump is called. -
ANSWER: Cavitation
Device that controls the pressure in a low pressure steam boiler - ANSWER:
Pressuretrol
Function of an evaporator - ANSWER: Absorb heat from the system
Metal which has a high iron content - ANSWER: ferrous
Why should the angle between the leg of a swing and the load never be less than
30 degrees? - ANSWER: More stress loads are applied on the sling
What are two kinds of misalignment that must be checked for when installing
pumps? - ANSWER: Parallel and angular alignment
What is the function of a compressor? - ANSWER: Create flow in the system
After fittings and tubes are cleaned and fluxed, they should be assembled and
soldered - ANSWER: As soon as possible
The relief valve is sized to the ________ rating of a boiler - ANSWER: Gross
Output
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Four types of copper tube joints - ANSWER: Soldered, Brazed, Flared,
Compression
Most common hanger type - ANSWER: Clevis
Which hitch can support the most weight? - ANSWER: Basket Hitch
Minimum safe working distance for overhead power lines - ANSWER: 10 feet
Three basic hitches which can be used for lifting with a sling - ANSWER:
Straight, Choker, Basket
Amount of heat required to bring about a change in a state in a substance -
ANSWER: Latent heat
Harmful products of incomplete combustion - ANSWER: Carbon Monoxide &
Aldehydes
Regulating or throttling flow is done with - ANSWER: Globe
4 main components in a refrigeration system - ANSWER: Compressor,
Condenser, Evaporator, Metering device.
Quanting of heat involved to change a substance that can be measured with a
thermometer - ANSWER: Sensible heat
, 3|Page
Main advantage of a fluidized bed boiler - ANSWER: Low SO & NOx emissions
Two basic types of low-water cutoffs - ANSWER: Float type and electric probe
Measurement unit used to express rate of flow - ANSWER: Velocity
Weakest part of a chain hoist - ANSWER: Lower Hook
Four principle functions of valves - ANSWER: Start/Stop, Regulate/Throttle,
Relief, Reduce
Oxyacetylene flame has a peak temperature of approximately - ANSWER: 6300
Float and thermostatic trap rises to discharge - ANSWER: Condensate
Vapor heated above its corresponding saturation temperature with no change in
pressure - ANSWER: Superheated
Magnetic field around a current carrying wire - ANSWER: Exists at all points
long its length
How many feet can a pump raise water vertically by suction - ANSWER: 34 feet
What steps should be taken before starting a pump for the first time - ANSWER:
Prime, Check suction and discharge valves, Check rotation
Constant used to find offset or advance with 45 degree offset - ANSWER: .707
PIPEFITTER STAR EXAM PART 1 QUESTIONS
AND CORRECT ANSWERS| LATEST UPDATED
VERSION WITH VERIFIED SOLUTIONS -
ASSURED PASS
Violent flashing and collapsing of vapor bubbles in a centrifugal pump is called. -
ANSWER: Cavitation
Device that controls the pressure in a low pressure steam boiler - ANSWER:
Pressuretrol
Function of an evaporator - ANSWER: Absorb heat from the system
Metal which has a high iron content - ANSWER: ferrous
Why should the angle between the leg of a swing and the load never be less than
30 degrees? - ANSWER: More stress loads are applied on the sling
What are two kinds of misalignment that must be checked for when installing
pumps? - ANSWER: Parallel and angular alignment
What is the function of a compressor? - ANSWER: Create flow in the system
After fittings and tubes are cleaned and fluxed, they should be assembled and
soldered - ANSWER: As soon as possible
The relief valve is sized to the ________ rating of a boiler - ANSWER: Gross
Output
,2|Page
Four types of copper tube joints - ANSWER: Soldered, Brazed, Flared,
Compression
Most common hanger type - ANSWER: Clevis
Which hitch can support the most weight? - ANSWER: Basket Hitch
Minimum safe working distance for overhead power lines - ANSWER: 10 feet
Three basic hitches which can be used for lifting with a sling - ANSWER:
Straight, Choker, Basket
Amount of heat required to bring about a change in a state in a substance -
ANSWER: Latent heat
Harmful products of incomplete combustion - ANSWER: Carbon Monoxide &
Aldehydes
Regulating or throttling flow is done with - ANSWER: Globe
4 main components in a refrigeration system - ANSWER: Compressor,
Condenser, Evaporator, Metering device.
Quanting of heat involved to change a substance that can be measured with a
thermometer - ANSWER: Sensible heat
, 3|Page
Main advantage of a fluidized bed boiler - ANSWER: Low SO & NOx emissions
Two basic types of low-water cutoffs - ANSWER: Float type and electric probe
Measurement unit used to express rate of flow - ANSWER: Velocity
Weakest part of a chain hoist - ANSWER: Lower Hook
Four principle functions of valves - ANSWER: Start/Stop, Regulate/Throttle,
Relief, Reduce
Oxyacetylene flame has a peak temperature of approximately - ANSWER: 6300
Float and thermostatic trap rises to discharge - ANSWER: Condensate
Vapor heated above its corresponding saturation temperature with no change in
pressure - ANSWER: Superheated
Magnetic field around a current carrying wire - ANSWER: Exists at all points
long its length
How many feet can a pump raise water vertically by suction - ANSWER: 34 feet
What steps should be taken before starting a pump for the first time - ANSWER:
Prime, Check suction and discharge valves, Check rotation
Constant used to find offset or advance with 45 degree offset - ANSWER: .707
