Pipefitter Star Exam Part 2 Actual Questions And
Answers With Verified Solutions Grade A+.
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
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
1
,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
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
2
, 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
Pressure is - ANSWER: force per unit of area
Never expose any part of a compressed gas cylinder to temps above - ANSWER: 125 F
What must be check on a boiler before putting it on line for the first time? - ANSWER:
Safety relief valve
An increase in pressure will cause the boiling temperature of a liquid to - ANSWER:
Increase
Function of a metering device in refrigeration - ANSWER: Regulates the flow of
refrigerant
What is the function of a condeser - ANSWER: Reject heat from the refrigerant
3
Answers With Verified Solutions Grade A+.
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
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
1
,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
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
2
, 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
Pressure is - ANSWER: force per unit of area
Never expose any part of a compressed gas cylinder to temps above - ANSWER: 125 F
What must be check on a boiler before putting it on line for the first time? - ANSWER:
Safety relief valve
An increase in pressure will cause the boiling temperature of a liquid to - ANSWER:
Increase
Function of a metering device in refrigeration - ANSWER: Regulates the flow of
refrigerant
What is the function of a condeser - ANSWER: Reject heat from the refrigerant
3
