Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 44 lbs
  • 13.9 lbs
  • 6.6 lbs

2: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-11
  • R-113
  • R-12

3: How is bring measured?

  • hydrometer
  • manometer
  • hygrometer
  • anemometer

4: A Lithium-bromide system is an absorption system that

  • uses ammonia as a refrigerant and lithium bromide as an absorbent
  • uses water as a refrigerant and lithium bromide as an absorbent
  • uses water as a absorbent and lithium bromide as a refrigerant
  • uses salts as an absorbent and lithium bromide as a refrigerant

5: What is used to check very low air pressures in air conditioning duct?

  • Barometer
  • Anemomter
  • Manometer
  • Vacuum gauge

6: How many gallons of water per pound of ammonia do you need?

  • 20
  • 5
  • 15
  • 1

7: One ton of refrigeration is defined as ______ btu/minute.

  • 12,000
  • 200
  • 60
  • 720,000

8: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Any employee
  • Anyone, it's a completely safe area
  • Authorized persons only

9: A single pole-double throw switch used how many wires excluding the ground wire?

  • two
  • five
  • three
  • four

10: What type refrigerant is NOT ozone depleting?

  • HFC
  • CFC
  • Halon
  • HCFC

11: Low pressure systems have what kind of compressor?

  • Reciprocating
  • Centrifugal
  • Scroll
  • Rotary

12: With a 5/8" X 5/8" x 3/4" tee, what size is the center connection?

  • 1/2"
  • 5/8"
  • 3/8"
  • 3/4"

13: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • CFC-11
  • HCFC-123
  • ammonia
  • Lithium bromide

14: How would you know if there was a loss of crankcase pressure?

  • oil will thicken
  • oil level will rise
  • oil will foam
  • oil will thin out

15: The location of a thermal bulb of a TXV affects

  • the amount of liquid returning to the compressor
  • subcooling
  • the amount of liquid in the condenser.
  • the amount of liquid refrigerant in the evaporator

16: At higher altitudes, boiling temperatures

  • depends on the refrigerant
  • increase
  • decrease
  • are unaffected

17: How many gallons of water do you need per pound of ammonia?

  • 50
  • 100
  • 1
  • 10

18: "I" represents ____ in the Ohm's law formula.

  • amperage
  • resistance
  • voltage.
  • capacitance

19: The difference between saturated liquid and saturated vapor is

  • heat
  • volume
  • temperature
  • pressure

20: R-22 falls under which safety classification?

  • B-1
  • A-2
  • A-1
  • B-2

21: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

22: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

23: What refrigerant doesn't have to be classified?

  • R-717
  • R-134A
  • R-422A
  • R-718

24: The freezing point of water at sea level is?

  • 0F
  • -10C
  • 32C
  • 32F

25: What must be done to refrigerant pipes before being buried?

  • Coated
  • Encased
  • Certified
  • Leaked checked