PIPE FITTER FINAL QUESTIONS AND ANSWERS
A piping arrangement whereby the radiation is below the supply main - Answers
:downfeed system
Pipe arrangement in which the first radiator fed is the last radiator to return - Answers
:reverse return
A system having all circuits from boiler to radiator equal in length - Answers :Reverse
Return
The measure of earth attraction for a body - Answers :weight
A weighted check valve used to prevent gravity circulation of hot water - Answers :Flow
Control Valve
A system which uses the radiation as part of the main - Answers :Series loop system
Whats factors are considered in measuring power? - Answers :force exerted
Distance
Time required
100 inches of steel would increase approx....... Of the temperature were increased 100F
- Answers :1/16" every hundred inches
If the large piston of a hydraulic press moves 2" as the smaller piston moves 3 feet,
what is the MA of the press - Answers :MA = 18
MA = 3' / 2" or MA = 36" / 2" = 18
A compression tank which has lost its charge of air and becomes filled with water is.. -
Answers :water logged
Engine Horsepower - Answers :33,000 ft. Lbs/min
550 ft. Lbs/second
_______________ shows graphically the relationship between specific air conditions -
Answers :Psychrometric Charts
The lowest temperature reached by evaporating water under a specific set of air
conditions - Answers :Wet Bulb Temperature
The specific heat of air is - Answers :.24 BTU
1 MBH is equal to - Answers :1,000 BTU/hr
,Heat added to a gas above saturation temperature is known as... - Answers :super heat
An open expansion tank must be located at... - Answers :the highest point open to the
atmosphere (not near the boiler)
Water is not used in thermometers because.... - Answers :it does not expand uniformly
In a hot water system air is completely eliminated from the system (T/F) - Answers
:False
You need air in the compression tank
Which of the following is not a steam heating system
A) 1 pipe gravity
B) vapor
C) vacuum
D) series loop - Answers :d) series loop
AIR when passing over 32F ice has its temperature lowered and loses a portion of its
water by... - Answers :condensation
When air is passed throufh a water spray, some of the moisture of the air is given up
only if the temperature of the water is below the __________ temperature of the air -
Answers :dewpoint
At any one temperature air is capable of containing a certain maximum amount of water
vapor (T/F) - Answers :true
Air containing all the water vapor it can at its existing temperature - Answers :saturated
air
Dewpoint temperature is that point where air is left absolutely "dry" when the air is
cooled below its saturation temperature so that all the moisture present in the air is
condensed (T/F) - Answers :false
Air as low as 60F entering a room through a grill can be used without any formation of
strong drafts or uncomfortable reactions of the occupants (T/F) - Answers :true
A fitting used on a one pipe system to cause flow of water to the radiation units -
Answers :diversion tee
If you were filling a closed system 56ft high from gauge location at the top of the boiler
to the highest radiation, what should the gauge read in psig. - Answers :24.25 PSIG
.433 x 56 ft = 24.25 PSIG
, The boiler is the best place to separate the air from the water because it is the point of...
- Answers :lowest velocity and highest temperature
Water pressure is measured by means of a... - Answers :bourdon tube guage
Pressure equals... - Answers :depth x density
Archimedes Principle - Answers :a body immersed in a fluid loses as much weight as
the weight of the fluid it displaces
Other names used for specific weight are specific.... And specific... - Answers :specific
gravity and specific density
100 centigrade units equals 180F units (T/F) - Answers :False
100C = 212F
Absolute pressure equals - Answers :Gauge pressure plus Atmospheric Pressure
-4600 = Absolute zero (T/F) - Answers :false, -460 = Absolute zero
Weight of a cu. Ft. Or air = - Answers :.0807 lbs.
2 kinds of energy - Answers :Kinetic - energy of motion
Potential - stored energy
Potential energy = - Answers :weight x height
Water contracts as cooled above and below 39.1 F (T/F) - Answers :False
Water contracts as cooled until it reaches 39.1 F and then expand until it reaches 32 F
How many BTU does the human body give off from evaporation - Answers :100 BTU
per hour
One ton of refrigeration is equal to the removal of... - Answers :288,000 BTU /24 hrs
12,000 BTU /hour
At what point are the dry bulb, wet bulb, and the dewpoint temperature the same -
Answers :at 100% Humidity
What is the typical bulb charge - Answers :the same refrigerant thats in the system
Where should a dehydrator be placed in the system - Answers :in the liquid line
How much air is removed by evacuating a system - Answers :most of the air
How is sensible heat measured - Answers :dry bulb temperature
A piping arrangement whereby the radiation is below the supply main - Answers
:downfeed system
Pipe arrangement in which the first radiator fed is the last radiator to return - Answers
:reverse return
A system having all circuits from boiler to radiator equal in length - Answers :Reverse
Return
The measure of earth attraction for a body - Answers :weight
A weighted check valve used to prevent gravity circulation of hot water - Answers :Flow
Control Valve
A system which uses the radiation as part of the main - Answers :Series loop system
Whats factors are considered in measuring power? - Answers :force exerted
Distance
Time required
100 inches of steel would increase approx....... Of the temperature were increased 100F
- Answers :1/16" every hundred inches
If the large piston of a hydraulic press moves 2" as the smaller piston moves 3 feet,
what is the MA of the press - Answers :MA = 18
MA = 3' / 2" or MA = 36" / 2" = 18
A compression tank which has lost its charge of air and becomes filled with water is.. -
Answers :water logged
Engine Horsepower - Answers :33,000 ft. Lbs/min
550 ft. Lbs/second
_______________ shows graphically the relationship between specific air conditions -
Answers :Psychrometric Charts
The lowest temperature reached by evaporating water under a specific set of air
conditions - Answers :Wet Bulb Temperature
The specific heat of air is - Answers :.24 BTU
1 MBH is equal to - Answers :1,000 BTU/hr
,Heat added to a gas above saturation temperature is known as... - Answers :super heat
An open expansion tank must be located at... - Answers :the highest point open to the
atmosphere (not near the boiler)
Water is not used in thermometers because.... - Answers :it does not expand uniformly
In a hot water system air is completely eliminated from the system (T/F) - Answers
:False
You need air in the compression tank
Which of the following is not a steam heating system
A) 1 pipe gravity
B) vapor
C) vacuum
D) series loop - Answers :d) series loop
AIR when passing over 32F ice has its temperature lowered and loses a portion of its
water by... - Answers :condensation
When air is passed throufh a water spray, some of the moisture of the air is given up
only if the temperature of the water is below the __________ temperature of the air -
Answers :dewpoint
At any one temperature air is capable of containing a certain maximum amount of water
vapor (T/F) - Answers :true
Air containing all the water vapor it can at its existing temperature - Answers :saturated
air
Dewpoint temperature is that point where air is left absolutely "dry" when the air is
cooled below its saturation temperature so that all the moisture present in the air is
condensed (T/F) - Answers :false
Air as low as 60F entering a room through a grill can be used without any formation of
strong drafts or uncomfortable reactions of the occupants (T/F) - Answers :true
A fitting used on a one pipe system to cause flow of water to the radiation units -
Answers :diversion tee
If you were filling a closed system 56ft high from gauge location at the top of the boiler
to the highest radiation, what should the gauge read in psig. - Answers :24.25 PSIG
.433 x 56 ft = 24.25 PSIG
, The boiler is the best place to separate the air from the water because it is the point of...
- Answers :lowest velocity and highest temperature
Water pressure is measured by means of a... - Answers :bourdon tube guage
Pressure equals... - Answers :depth x density
Archimedes Principle - Answers :a body immersed in a fluid loses as much weight as
the weight of the fluid it displaces
Other names used for specific weight are specific.... And specific... - Answers :specific
gravity and specific density
100 centigrade units equals 180F units (T/F) - Answers :False
100C = 212F
Absolute pressure equals - Answers :Gauge pressure plus Atmospheric Pressure
-4600 = Absolute zero (T/F) - Answers :false, -460 = Absolute zero
Weight of a cu. Ft. Or air = - Answers :.0807 lbs.
2 kinds of energy - Answers :Kinetic - energy of motion
Potential - stored energy
Potential energy = - Answers :weight x height
Water contracts as cooled above and below 39.1 F (T/F) - Answers :False
Water contracts as cooled until it reaches 39.1 F and then expand until it reaches 32 F
How many BTU does the human body give off from evaporation - Answers :100 BTU
per hour
One ton of refrigeration is equal to the removal of... - Answers :288,000 BTU /24 hrs
12,000 BTU /hour
At what point are the dry bulb, wet bulb, and the dewpoint temperature the same -
Answers :at 100% Humidity
What is the typical bulb charge - Answers :the same refrigerant thats in the system
Where should a dehydrator be placed in the system - Answers :in the liquid line
How much air is removed by evacuating a system - Answers :most of the air
How is sensible heat measured - Answers :dry bulb temperature
