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WorksheetsRefrigeration Exam
Total questions: 25
Worksheet time: 8mins
PSIG indicates ____.
pounds per square inch absolute gravity
pounds per square inch absolute gauge
pounds per square inch of pressure absolute
pounds per square inch of gravity
As the temperature of a material increases, the molecules in the material ____.
travel farther
travel faster
slow down
travel in more of a parallel direction
Temperature can be thought of as ____.
the amount of heat in a material
the density of the material
a description of the level of heat
the weight of the total mass of the material
Pure water boils at a temperature of 212°F at which of the following standard conditions?
12.967 psi
13.967 psi
14.967 psi
15.967 psi
The temperature on the Fahrenheit scale where all molecular biology activity stops is ____.
-400°F
-460°F
-0°F
-562.95°F
A Bourdon tube is often found in a(n) ____.
mercury barometer
aneroid barometer
pressure gauge
mercury thermometer
A solid material exerts a pressure or force ____.
in all directions
downward only
outward and downward
outward only
The unit used to measure electrical power is the ____.
volt
ampere
watt
ohm
What happens when room temperature soda is poured into a glass of ice?
The ice gets colder.
The ice melts because it is giving up the "cold" to the soda.
The ice melts because it is absorbing heat from the soda.
The ice melts because the soda is colder than the ice.
A liquid material exerts a pressure or force ____.
in all directions
downward only
outward and downward
outward only
True or False, water at 0°F has no heat energy or molecular activity.
True
False
The compressor in a refrigeration system ____.
raises the boiling point of the refrigerant
pumps the refrigerant throughout the system
both answers
none of the answers
When a refrigerant enters the compressor, it is a ____ and when it leaves the compressor, it is a ____.
low pressure low temperature superheated vapor, high pressure high temperature superheated vapor
low pressure low temperature superheated vapor, low pressure low temperature subcooled vapor
high pressure superheated vapor, low pressure superheated vapor
low pressure low temperature subcooled liquid, high pressure high temperature superheated vapor
True or False, the difference in the level of heat between two substances will determine the heat transfer rate between the substances.
True
False
The condenser ____.
rejects the heat from the refrigerant
controls the refrigerant flow throughout the system
adds superheat to the refrigerant
all of the answers
A ton of refrigeration is equal to ____.
1 ton of ice
288,000 Btu/24-hr.
144 Btu/hr.
12,000 Btu/min.
Refrigeration can be described as ____.
the process of making products cold
the process of introducing heat to a location where it is not wanted
the process of removing heat from a place where it is not wanted to a place where it makes little or no difference
none of the answers
True or False, both sensible heat and latent heat transfers can be read with a thermometer.
True
False
The evaporator in a refrigeration system ____.
reduces the boiling point of the refrigerant
condenses the refrigerant
absorbs heat from the product to be cooled
compresses the refrigerant vapor
True or False, when water at 212°F boils, it is only absorbing latent heat.
True
False
The ____ are used to change the vapor to a liquid and the liquid form back into a vapor the refrigeration cycle.
condenser and compressor
compressor and expansion device
expansion device and evaporator
condenser and evaporator
Ice melts in a unpowered refrigerator because ____.
Heat flows through the insulated walls.
Heat enters when the door is opened
Heat enters when warm food is placed in the inside.
All of the answers
The temperature inside the refrigerator fresh food section should be about ____.
25 degrees F
30 degrees F
35 degrees F
40 degrees F
True or False, the evaporator in a refrigeration system must be colder than the refrigerated space in order to absorb heat.
True
False
A vapor material exerts a pressure or force ____.
in all directions
downward only
outward and downward
outward only
