ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

2: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When its white
  • When it's used as part of a supply or return air system
  • When there is a space 6' or more above it
  • When there are sprinklers above

3: Which occupancy can ammonia be used in?

  • industrial
  • commercial
  • redifential
  • depends on the quantity of freon

4: What is an example of institutional occupancy?

  • Hospital
  • Shopping mall
  • Dorms
  • Football stadium

5: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Magnesium alloy
  • Aluminum
  • Copper

6: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's water
  • Because it's cheap
  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's a non-flammable refrigerant

7: B3 refrigerants are considered

  • toxic but non-flammable
  • non-toxic but flammable
  • non-toxic but non-flammable
  • toxic and highly flammable

8: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or less
  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or less

9: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Glove valve
  • Rupture disk
  • Gate valve

10: What is a Category "M" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F

11: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the return air ducted system
  • the mechanical room housing the refrigeration system
  • the outdoors
  • Machinery rooms need not be vented

12: How much refrigerant can be stored in a mechanical room outside of the system?

  • 100
  • 330
  • 150
  • 200

13: What refrigerant were phased out in 2004?

  • R-22
  • R-11
  • R-134a
  • R-12

14: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

15: A relief valve shall be located at least ___ above grade.

  • 15'
  • 10'
  • 25'
  • 36'

16: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

17: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1.2
  • 2.2
  • 1.5
  • 1

18: The certificate of inspection

  • shall be authorized by a notarized insurance company
  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be posted and protected from dirt, water, and other elements
  • shall be posted on the compressor shell or electrical panel at the unit

19: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 50
  • 25
  • 66
  • 22

20: Pressure vessels with an internal volume of 3 cubic feet or more

  • shall use fusible plugs
  • shall use pressure relief devices
  • shall use pressure relief devices or fusible plugs
  • do not need pressure relief protection

21: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 550
  • 50
  • 100
  • 350

22: Who authorizes changes to the safety codes?

  • Board of Boilers
  • Person who pulled the permit
  • Contractor who last serviced the system.
  • Person in charge of the facility

23: Class A refrigerants are considered

  • toxic
  • flammable
  • non-flammable
  • non-toxic

24: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the low side
  • the aggregate of the high side and low side
  • the high side
  • 2.5 times the design pressure

25: The discharge relief valve is located (9.4.6)

  • between the compressor and oil separator
  • between the compressor and reciever
  • on top of the condensor
  • between the compressor and the stop valve