The Fahrenheit scale is based on boiling water at sea level at what temperature?
A: 459 degrees
B: 212 degrees
C: 180 degrees
D: 100
... [Show More] degrees
B: 212 degrees
Zero pounds gauge corresponds on the absolute scale to:
A: 144
B: 212
C: 14.7
D: zero
C: 14.7
Hidden heat in refrigeration work is referred to as:
A: Intensity of heat
B: Latent heat
C: Heat a thermometer can "sense"
D: Cold
B: Latent heat
Absolute zero on the Fahrenheit scale is:
A: 459 degrees
B: 273 degrees
C: 100 degrees
D: 0 degrees
A: 459 degrees
A ton of refrigeration is a unit equal to:
A: 2,880,000 btu per day
B: 12,000 btu per hour
C: 2,000 btu per minute
D: All of these are correct
B: 12,000 btu per hour
The heat used to change a liquid to a gas is called the latent heat of:
A: Absorption
B: Vaporization
C: Fusion
D: Liquid
B: Vaporization
A thermometer is said to "sense" what?
A: Heat of fusion
B: Latent heat
C: Sensible heat
D: Specific heat
C: Sensible heat
Five pounds of water is heated by two degrees F. How many btu were added to the water?
A: 25 btu
B: 10 btu
C: 5 btu
D: 2 btu
B: 10 btu
Wght x deg raise = btu's
5 x 2 = 10 btu's
The amount of heat required to melt one pound of ice at 32 degrees F is:
A: 212 btu
B: 180 btu
C: 144 btu
D: 970 btu
C: 144 btu
Superheat is added:
A: In changing a liquid to a vapor
B: In raising the temperature of water
C: After all the liquid has been changed to vapor
D: None of these is correct
C: After all the liquid has been changed to vapor
Subcooling is:
A: Heat removed in changing the temperature of a liquid.
B: Heat which causes a liquid to turn into a solid
C: Heat removed from a liquid below 0 degrees F
D: Heat removed below the subheat temperature
A: Heat removed in changing the temperature of a liquid.
The saturation temperature is:
A: Never actually reached
B: When water is at 0 degrees F
C: The same as the condensing temperature and boiling temperature
D: The reciprocal of the inverse of the superheat ratio
C: The same as the condensing temperature and boiling temperature
Cold is:
A: Any temperature below 98.6 degrees F
B: A temperature lower than 50 degrees F
C: A relative term with no specific temperature
D: A temperature near absolute zero
C: A relative term with no specific temperature
As the pressure over a liquid is lowered, _____________________.
A: temperature decreases
B: temperature increases
C: the boiling point of the liquid increases
D: the boiling point of the liquid decreases
D: the boiling point of the liquid decreases
As heat is added to a substance, _________________.
A: the molecules move slower
B: it becomes even easier to add still more heat
C: the substance loses heat
D: the molecules move faster
D: the molecules move faster
The amount of heat it takes to change the temperature of one pound of a substance by one degree Fahrenheit is called:
A: Subcooling
B: Specific heat
C: Superheat
D: Specific density
B: Specific heat
The specific heat of a substance changes when:
A: The temperature is greater than 100 degrees
B: The substance changes weight
C: The temperature falls below 30 degrees
D: The substance changes state
D: The substance changes state
A half-filled cylinder of refrigerant at 80 degrees F will be:
A: Superheated
B: Sub-cooled
C: Saturated
D: Sub-heated
C: Saturated
The air you are breathing is:
A: Super-heated
B: Sub-cooled
C: Saturated
D: Sub-heated
A: Super-heated
The three methods of heat transfer are:
A: Conduction, convection and radiation
B: Conduction, convection and evaporation
C: Condensation, convection and radiation
D: Convection, radiation and sublimation
A: Conduction, convection and radiation
As a gas is compressed, _____.
A: temperature and pressure increase
B: pressure decreases and volume increases
C: temperature decreases and pressure increases
D: temperature and pressure decrease
A: temperature and pressure increase
When compressed enough and then cooled, a gas will:
A: Explode
B: Sublimate
C: Flame off
D: Condense
D: Condense
The condensing temperature and the _____ temperature mean the same thing.
A: superheated
B: subcooling
C: saturation
D: sublimated
C: saturation
The evaporator is a:
A: High pressure component
B: Low pressure component
C: High and low pressure component
D: None of these is correct
B: Low pressure component
The two components that contain coils are:
A: Condenser and compressor
B: Condenser and evaporator
C: Evaporator and compressor
D: Evaporator and accumulator
B: Condenser and evaporator
Refrigerant vaporizes in the:
A: Condenser
B: Evaporator
C: Compressor
D: Oil separator
B: Evaporator
The two components that divide the high pressure side from the low pressure side of a system are the:
A: Compressor and condenser
B: Compressor and metering device
C: Condenser and evaporator
D: Liquid line and suction line
B: Compressor and metering device [Show Less]