ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • high pressure
  • low pressure
  • critical pressure
  • design pressure

3: What happens after your initial inspection of a pressure vessel?

  • Notify the Fire Marshal that the system has been inspected and approved
  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it
  • Notify the AHJ to let them know that the system been inspected

4: What is an example of institutional occupancy?

  • Hospital
  • Football stadium
  • Dorms
  • Shopping mall

5: When an inspection is needed, how often must it be done?

  • annually
  • every 18 months
  • every 24 months
  • every 36 months

6: How are refrigerant blends classified?

  • Based on worst case fractionation
  • Based on the oil used
  • Blends don't have to be classified
  • Based on best case Fractionation

7: A hotel is considered a _______ occupancy.

  • residential
  • institutional
  • commercial
  • mercantile

8: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

9: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • institutional occupancy
  • commercial occupancy
  • public assembly occupancy
  • illegal occupancy

10: Liquid level gauges must be provided with what?

  • A relief valve
  • A low level mark
  • Automatic shut-offs
  • A red line

11: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

12: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 75%
  • 100%
  • 90%
  • 80%

13: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 2.5, 3.0
  • 3.0, 3.5
  • 6.6, 6.6
  • 2.5, 2.5

14: What refrigerant were phased out in 2004?

  • R-12
  • R-134a
  • R-11
  • R-22

15: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

16: A class A3 refrigerant is considered

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

17: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Automatic ventilation
  • Tight fitting doors
  • Self-closing doors

18: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • compressor
  • boiler
  • evaporator
  • outside the machinery room

19: When should a relief valve start to function?

  • Before the purge station discharges
  • 10 psi before it's set pressure
  • Two times it's working pressure
  • At it's set pressure

20: What is not a requirement of a class T machine room?

  • tight fitting doors
  • fire hose connection to the building fire protection system
  • automatic ventilation
  • self-closing doors

21: Each machinery room shall contain

  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • high and low pressure controls
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate

22: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 36
  • 48
  • 24
  • 18

23: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

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

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

25: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above