2nd Year Steamfitter/Pipefitter 2024-2025.
Questions & Correct, Verified Answers. Graded A
45 degree offset calculation? – ANS Run x 1.414
A boiler rated for a hot water service at 120 psig and 240°F maximum would be
constructed under the rules of which code? - ANSASME Section IV (4)
A centrifugal chiller in a hydronic system is used to? – ANS Cool the glycol solution
A class one lever has its greatest mechanical advantage if the: - ANS Fulcrum is
close to the load
A class three lever will always have a mechanical advantage of: - ANS Less than 1
A class two leave has a mechanical advantage of: - ANS More than 1
A control device that is threaded into the boiler heat exchanger with the sensing
tube located inside it is called a: - ANS Thermal well
A hot water EDR has a BTU value of? – ANS 150 BTU/hr
A perpendicular line bi secting a horizontal line marks what angle? - ANS90
degrees
,A pH of 8 is? – ANS Slightly alkaline
A piping system by which the return water is returned to the boiler by the shortest
route possible is called a ___ system. – ANS Direct return
A regulator with an unbalanced outlet pressure is known as? – ANS Hunting
A single fixed pulley is used to? – ANS Change the direction of the force applied
Amperage is known as the measurement of? – ANS Electrical current flowing
through a conductor
Another name of voltage? – ANS EMF electromotive force
Argon-oxygen mixtures are used for welding of: - ANS Stainless steel
As piping in hot water system drops it is important to install a _____ before the
pipe drops? – ANS High point vent
As pressure increases what happens to temperature? – ANS Increases
Axial movement use what guides? – ANS Angle iron clip guide
Cast iron boiler max temperature? – ANS 250°F
,Charles law states what? – ANS As temperature increases, pressure increases
chemical formula for Butane? – ANS CHH10
Compounds are made up of? – ANS Elements that have chemically combined
Constant arc voltage (CAV) machines produce a: - ANS Relatively flat volt-amp
curve
Critical thing needed to prevent reformation of wet chlorine? – ANS Temperature
Critical thing needed to prevent reformation of wet chlorine? – ANS Temperature
Definition of radiation? – ANS Heat animated as waves or particles
Depending on the manufacture, push-pull system can reach distances of up
to___? – ANS 15 meters
Difference between 1 pipe and 2 pipe systems: - ANS 1 pipe uses gravity with high
point vents
2 pipe have steam traps
Disadvantage of a two-pipe direct return piping system? – ANS Hard to balance
flow to each heat transfer unit
Disadvantage of gravity hot water system? – ANS Requires large diameter piping
, Electrical pressure is measured in? – ANS Volts
Finned tube baseboard is rated by what method? – ANS BTU per foot per hour
based upon supply water temperature, flow rate and entrance air temperature of
65°F
First heat transfer unit supplied is also the first returned? – ANS Two-pipe direct
return
Flowmetres are calibrated to indicate the: - ANS Volume of shielding gas supplied
Function of a pump in a closed system? – ANS Circulate water
Heat is transferred through a soild by: - ANS Conduction
Heating transfer units are part of the piping? – ANS Series loop
Heating transfer units are supplied by speciality tees? – ANS One-pipe
Highest velocity in a venturi is where? – ANS Downstream of the narrowest point
Hot water heating systems pumps are rated in: - ANS Head pressure
How are GMAW guns rated? – ANS By current-carrying capacity
Questions & Correct, Verified Answers. Graded A
45 degree offset calculation? – ANS Run x 1.414
A boiler rated for a hot water service at 120 psig and 240°F maximum would be
constructed under the rules of which code? - ANSASME Section IV (4)
A centrifugal chiller in a hydronic system is used to? – ANS Cool the glycol solution
A class one lever has its greatest mechanical advantage if the: - ANS Fulcrum is
close to the load
A class three lever will always have a mechanical advantage of: - ANS Less than 1
A class two leave has a mechanical advantage of: - ANS More than 1
A control device that is threaded into the boiler heat exchanger with the sensing
tube located inside it is called a: - ANS Thermal well
A hot water EDR has a BTU value of? – ANS 150 BTU/hr
A perpendicular line bi secting a horizontal line marks what angle? - ANS90
degrees
,A pH of 8 is? – ANS Slightly alkaline
A piping system by which the return water is returned to the boiler by the shortest
route possible is called a ___ system. – ANS Direct return
A regulator with an unbalanced outlet pressure is known as? – ANS Hunting
A single fixed pulley is used to? – ANS Change the direction of the force applied
Amperage is known as the measurement of? – ANS Electrical current flowing
through a conductor
Another name of voltage? – ANS EMF electromotive force
Argon-oxygen mixtures are used for welding of: - ANS Stainless steel
As piping in hot water system drops it is important to install a _____ before the
pipe drops? – ANS High point vent
As pressure increases what happens to temperature? – ANS Increases
Axial movement use what guides? – ANS Angle iron clip guide
Cast iron boiler max temperature? – ANS 250°F
,Charles law states what? – ANS As temperature increases, pressure increases
chemical formula for Butane? – ANS CHH10
Compounds are made up of? – ANS Elements that have chemically combined
Constant arc voltage (CAV) machines produce a: - ANS Relatively flat volt-amp
curve
Critical thing needed to prevent reformation of wet chlorine? – ANS Temperature
Critical thing needed to prevent reformation of wet chlorine? – ANS Temperature
Definition of radiation? – ANS Heat animated as waves or particles
Depending on the manufacture, push-pull system can reach distances of up
to___? – ANS 15 meters
Difference between 1 pipe and 2 pipe systems: - ANS 1 pipe uses gravity with high
point vents
2 pipe have steam traps
Disadvantage of a two-pipe direct return piping system? – ANS Hard to balance
flow to each heat transfer unit
Disadvantage of gravity hot water system? – ANS Requires large diameter piping
, Electrical pressure is measured in? – ANS Volts
Finned tube baseboard is rated by what method? – ANS BTU per foot per hour
based upon supply water temperature, flow rate and entrance air temperature of
65°F
First heat transfer unit supplied is also the first returned? – ANS Two-pipe direct
return
Flowmetres are calibrated to indicate the: - ANS Volume of shielding gas supplied
Function of a pump in a closed system? – ANS Circulate water
Heat is transferred through a soild by: - ANS Conduction
Heating transfer units are part of the piping? – ANS Series loop
Heating transfer units are supplied by speciality tees? – ANS One-pipe
Highest velocity in a venturi is where? – ANS Downstream of the narrowest point
Hot water heating systems pumps are rated in: - ANS Head pressure
How are GMAW guns rated? – ANS By current-carrying capacity
