This ACR 109 Final Exam Review assesses knowledge on handling and safety of refrigerants and pressure vessels. Key skills tested include calculation of pressure in varying conditions and safe handling procedures. Essential for students in HVAC and refrigeration courses.
A small ship containing refrigerant cylinders
The compressor in a refrigeration unit
A cylinder containing refrigerant
A portable dolly
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255.7 psig
259.9 psig
267.0 psig
271.5 psig
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202.64
226.61
194.92
145.71
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Material with a low melting point
Plastic
Copper fused with brass
A metal alloy that will burn when overheated
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Goggles with side shields and gloves
Heavy protective clothing
Rubber gloves
Industrial steel-toed shoes and an insulated cap
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Place a rubber mat on the floor
Use a wooden ladder
Wear insulated boots and gloves
All of the above.
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Equipment
Local
Distribution
Remote
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Has two ground wires to insure proper grounding
Generally has a plastic case with the electrical connections and motor insulated within the tool
Is used with a three- to -two- prong adapter
Has rechargeable batteries
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Live
Control
Grounding
Neutral
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A
B
C
D
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A
B
C
D
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A
B
C
D
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Water
Carbon dioxide
Nitrogen
Dry chemical powder
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5/8" ACR
1/2" PVC
1/2" ID Copper
5/8" PVC
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Inside dimension
Outside dimension
Wall thickness
None of the above.
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Inside diameter
Outside diameter
Wall thickness
None of the above
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212 F
400 F
600 F
842 F
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The same temperature as
Lower temperatures than
Higher temperatures than
Temperatures that can be higher or lower than
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50/50 tin-lead
95/5 tin-antimony
15%-60% silver
Bronze rod
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Heated directly by the flame of the heat source
Heated by the surrounding air
Used to oxidize the metal
Melted by heat from the tubing and fitting
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The atmospheric pressure pushes it in
Of capillary action
There are no surface pores in the base metal
The tubing surface melts and the pressure differential forces it in
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Long tail flame
Neutral flame
Oxidizing flame
Carbonizing flame
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It helps prevent oxidation.
It helps keep pipes clean.
It helps solder flow easier.
All of the above are correct.
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The male part of the joint only
The female part of the joint only
Both the male and female parts of the joint
Around the mated parts
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Steel wool
Carborundum cloth
Sand cloth
Nylon cloth
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All nominal standard
American national standard
All new steel
Apparent nominal standard
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Are tapered
Should have at least seven perfect threads
Generally have a "V" shape
All of the above
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Pipe dope
Flux
Solder
Gasket
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In a vacuum
Open to the atmosphere
Operating with all fans activated
Standing with dry nitrogen pressure of 150 psig in the system
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Carbon dioxide
Acid
Carbon monoxide
Carbolic acid
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Are desirable in a refrigeration system
Are undesirable in a refrigeration system
Condense readily under normal atmospheric conditions
Help in pulling a vacuum
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Raise the pressure in a refrigeration system
Lower the pressure in a refrigeration system below atmospheric
Allow refrigerant to escape into the atmosphere
Condense the gas in the system
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Indicates pressures above 14.696 psia
Indicates pressures in inches Hg below atmospheric pressure
Is one of two gauges on a typical gauge manifold
All of the above
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Atmospheric pressures at high altitudes
Atmospheric pressures at sea level
Absolute pressures below 1 mm Hg
High pressure in a refrigeration system
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200 to 100 microns
300 to 100 microns
300 to 200 microns
500 to 300 microns
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10 psia
5" Hg VAC
5 psig
1000 microns
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You connect 3 vacuum pumps simultaneously to a refrigeration system and pull a vacuum
You pull a vacuum on three different systems at the same time
You pull a vacuum on a refrigeration system more than once, allowing refrigerant or nitrogen into the system between each procedure
There must be more than one system operating before a vacuum can be pulled
Vaporized
Condensed
Cooled
Solidified
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Light flexible hose
Heavy duty rubber gauge line
Copper tube
Garden hose
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True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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True
False
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Quiz Review Timeline (Updated): Mar 21, 2023 +
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