HVAC Unit 3 Review Test with All Correct & 100%
Verified Answers| Actual Complete Exam| Already
Graded A+
Ice melts in ice boxes because
a. heat flows through the insulated walls.
b. heat flows through the doorway when it is opened.
c. heat is moved into the box when warm food is placed in it.
d. All of the above. ✔Correct Answer-D
High-temperature refrigeration is that produced by
a. heat from a furnace.
b. an air-conditioning system,
c. the vegetable cooling system of a refrigerator.
d. the freezer section of a refrigerator. ✔Correct Answer-B
A ton of refrigeration is equal to
a. 1 ton of Ice.
b. 288,000 Btu/24 h.
c. 144 Btu/h.
d. a large refrigerator. ✔Correct Answer-B
The evaporator in a refrigeration system
a. meters the refrigerant.
b. condenses the refrigerant.
c. is the component where refrigerant boils and absorbs heat.
d. compresses the vaporized refrigerant. ✔Correct Answer-C
The compressor in a refrigeration system
a. compresses the refrigerant.
b. pumps the refrigerant throughout the system.
c. Both A and B.
d. None of the above. ✔Correct Answer-C
The condenser
a. rejects the heat from the refrigerant.
b. meters the refrigerant throughout the system.
c. causes super-heat in-the refrigerant.
d. All of the above. ✔Correct Answer-A
Reciprocating compressors have
a. a piston and a cylinder.
b. two scrolls that mesh together.
c. a rotor to compress the refrigerant.
d. a large fan-type compressor component. ✔Correct Answer-A
R-22 is a refrigerant most commonly used in _________ systems.
a. residential air-conditioning
, b. light commercial refrigeration
c. industrial refrigeration
d. household refrigeration ✔Correct Answer-A
R-134a is a refrigerant most commonly used in ________ systems.
a. medium-temperature
b. residential air-conditioning
c. primarily low-temperature
d. All of the above. ✔Correct Answer-A
The cylinder color code for R-410A is
a. rose.
b. white.
c. yellow.
d. green. ✔Correct Answer-A
The cylinder color code for R-134a is
a. red.
b. yellow.
c. light blue.
d. green. ✔Correct Answer-C
The cylinder color code for R-404A is
a. orchid.
b. orange.
c. purple.
d. green. ✔Correct Answer-B
The cylinder color code for R-22 is
a. orchid.
b. white.
c. purple.
d. green. ✔Correct Answer-D
Good ventilation is important when working around refrigeration equipment because modern
refrigerants
a. are toxic and can poison you.
b. have a very unpleasant odor.
c. may get on your skin and cause a rash.
d. are heavier than air and may displace the oxygen around you. ✔Correct Answer-D
The boiling point of a refrigerant should be low enough at atmospheric pressure so that low
temperatures can be reached and the refrigeration system will
a. not overheat.
b. not explode.
c. not go into a vacuum.
d. notice up. ✔Correct Answer-C
It is believed that certain refrigerants such as CFCs and HCFCs, when allowed to escape into the
atmosphere, will
a. destroy the hydrogen layer and allow more of the sun's rays to overheat the earth.
Verified Answers| Actual Complete Exam| Already
Graded A+
Ice melts in ice boxes because
a. heat flows through the insulated walls.
b. heat flows through the doorway when it is opened.
c. heat is moved into the box when warm food is placed in it.
d. All of the above. ✔Correct Answer-D
High-temperature refrigeration is that produced by
a. heat from a furnace.
b. an air-conditioning system,
c. the vegetable cooling system of a refrigerator.
d. the freezer section of a refrigerator. ✔Correct Answer-B
A ton of refrigeration is equal to
a. 1 ton of Ice.
b. 288,000 Btu/24 h.
c. 144 Btu/h.
d. a large refrigerator. ✔Correct Answer-B
The evaporator in a refrigeration system
a. meters the refrigerant.
b. condenses the refrigerant.
c. is the component where refrigerant boils and absorbs heat.
d. compresses the vaporized refrigerant. ✔Correct Answer-C
The compressor in a refrigeration system
a. compresses the refrigerant.
b. pumps the refrigerant throughout the system.
c. Both A and B.
d. None of the above. ✔Correct Answer-C
The condenser
a. rejects the heat from the refrigerant.
b. meters the refrigerant throughout the system.
c. causes super-heat in-the refrigerant.
d. All of the above. ✔Correct Answer-A
Reciprocating compressors have
a. a piston and a cylinder.
b. two scrolls that mesh together.
c. a rotor to compress the refrigerant.
d. a large fan-type compressor component. ✔Correct Answer-A
R-22 is a refrigerant most commonly used in _________ systems.
a. residential air-conditioning
, b. light commercial refrigeration
c. industrial refrigeration
d. household refrigeration ✔Correct Answer-A
R-134a is a refrigerant most commonly used in ________ systems.
a. medium-temperature
b. residential air-conditioning
c. primarily low-temperature
d. All of the above. ✔Correct Answer-A
The cylinder color code for R-410A is
a. rose.
b. white.
c. yellow.
d. green. ✔Correct Answer-A
The cylinder color code for R-134a is
a. red.
b. yellow.
c. light blue.
d. green. ✔Correct Answer-C
The cylinder color code for R-404A is
a. orchid.
b. orange.
c. purple.
d. green. ✔Correct Answer-B
The cylinder color code for R-22 is
a. orchid.
b. white.
c. purple.
d. green. ✔Correct Answer-D
Good ventilation is important when working around refrigeration equipment because modern
refrigerants
a. are toxic and can poison you.
b. have a very unpleasant odor.
c. may get on your skin and cause a rash.
d. are heavier than air and may displace the oxygen around you. ✔Correct Answer-D
The boiling point of a refrigerant should be low enough at atmospheric pressure so that low
temperatures can be reached and the refrigeration system will
a. not overheat.
b. not explode.
c. not go into a vacuum.
d. notice up. ✔Correct Answer-C
It is believed that certain refrigerants such as CFCs and HCFCs, when allowed to escape into the
atmosphere, will
a. destroy the hydrogen layer and allow more of the sun's rays to overheat the earth.
