ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

  • 200
  • 150
  • 100
  • 330

3: A class B2 refrigerant is considered

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

4: _____ and its alloys are suitable for use with ammonia systems.

  • Magnesium
  • Zinc
  • Copper
  • Aluminum

5: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UV”
  • “UL”
  • “UM” and “UV”
  • “U” or “UM”

6: Ammonia belongs to Group

  • A-2
  • B-2
  • B-1
  • A-1

7: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

8: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

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

  • 15
  • 5
  • 1
  • 20

10: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with ammonia
  • Flush with R-718
  • Flush with R-11
  • Flush with RX-11

11: 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
  • outside the machinery room
  • evaporator

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

  • 1
  • 1.2
  • 1.5
  • 2.2

13: R-22 is considered a(n)

  • HCFCH
  • CFC
  • HFC
  • HCFC

14: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • first disconnect in
  • load-side of the contactor in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • breaker panel in

15: What is R-22?

  • Chlorodifluoromethane
  • CCFCM
  • Chlorofluoromethane
  • HFC

16: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 20
  • 10
  • 15
  • 25

17: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

18: How many groups of refrigerants are there?

  • 7
  • 1
  • 5
  • 3

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

  • 18
  • 50
  • 22
  • 33

20: What refrigerant doesn't have to be classifted?

  • R-717
  • R-134a
  • R-711
  • R-718

21: What type of material can't be used on the outlet of a relief valve?

  • Copper
  • Magnesium alloy
  • PVC
  • Stainless steel

22: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

23: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

24: Refrigerants shall be classified by

  • color codes
  • toxicity and flammability
  • maximum permissible quantities of each group
  • requirements for commercial, industrial, and residential occupancies

25: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • of Group B2 refrigerant shall be prohibited
  • shall not be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall be prohibited