Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: What type of fuses must be used on a HVAC system?

  • TR Type, Duel Element, Time Delay
  • Fast blow
  • 10% lower than RLA
  • none of the above

2: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • A-1
  • B-1
  • A-2

3: A rule of thumb in air conditioning is ____ CFM per ton?

  • 500
  • 600
  • 400
  • 100

4: Which oil is hydoscopic?

  • polyolester
  • mineral
  • SW30
  • animal

5: Ammonia is under what safety classification?

  • B3
  • B2
  • B1
  • A3

6: 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

7: A professional or office building would be considered what type of occupancy?

  • mercantile
  • business
  • commercial
  • public assembly

8: A class B2 refrigerant is considered

  • toxic and somewhat flammable
  • toxic and non-flammable
  • non-toxic and highly flammable
  • non-toxic and non-flammable

9: Which refrigerant class listed below is the most flammable?

  • B-2
  • A-1
  • A-3
  • C-3

10: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • III
  • 15
  • 25
  • 10

11: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

12: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

13: A device used to measure small pressure differences is the

  • phsycometirc
  • pyrometer
  • manometer
  • anemometer

14: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Approved by the authorized person
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room

15: A solder joint melts at temperatures of

  • 600F to 900F
  • 400F to 800F
  • 1,200F to 1,500F
  • less than 400F

16: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

17: Instead of using a compressor, an absorption air-conditioning chiller uses which of the following as its driving force?

  • Air
  • Oil
  • Heat
  • Electricity

18: Watt's Law indicates Volts X Amps = _________.

  • Resistance
  • Ohms
  • Watts
  • Current

19: How much clearance do you need around the perimeter of electrical panels?

  • 24"
  • 18"
  • 12"
  • 36"

20: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

21: What refrigerant were phased out in 2004?

  • R-11
  • R-134a
  • R-12
  • R-22

22: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type L
  • Type K
  • Type N

23: How is bring measured?

  • manometer
  • hydrometer
  • hygrometer
  • anemometer

24: While the system is operating, the discharge line should be

  • too hot to hold by hand
  • at the same temperature as the crankcase
  • 10-15F warmer than ambient
  • room temperature

25: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Aluminum
  • Magnesium alloy
  • Copper