ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • on a conspicuous card located near the evaporator
  • on a conspicuous card located near the compressor
  • outside the room, immediately adjacent to each door
  • inside the room, immediately adjacent to each door

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

  • True
  • False

3: Direct systems using Group II refrigerants

  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms
  • shall be allowed to be used for human comfort.

4: What would be the classification of a church?

  • Institutional
  • Large mercantile
  • Place of assembly
  • Industrial

5: R-22 is considered a(n)

  • HFC
  • HCFC
  • CFC
  • HCFCH

6: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 3
  • 2
  • 5
  • 1

7: Ammonia is under what safety classification?

  • B2
  • B1
  • A3
  • B3

8: What is the refrigerant chlorodifluoromethane?

  • R-134a
  • R-123
  • R-12
  • R-22

9: What section governs pressure vessels?

  • Section ASHREA 34
  • Section 8 ASHREA 15 ASME unfired
  • OSHA
  • Section 1 ASHREA 15 ASME fired

10: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Make sure its compatible, notify owner, and notify AHJ.
  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line
  • Nothing must be done

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

  • Copper
  • PVC
  • Stainless steel
  • Magnesium alloy

12: A Low-Probability System

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system

13: Liquid level gauges must be provided with what?

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

14: What is an egress?

  • A valve put on the low side of the system to prevent frosting
  • A code violation
  • An entrance or exit
  • An escape route

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

  • 50
  • 25
  • 66
  • 22

16: 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)

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

17: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

18: 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

19: R-123 belongs to Group

  • B-3
  • B-2
  • A-3
  • B-1

20: 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

21: A relief valve discharge capacity is rated in

  • Pounds of air per minute.
  • PSIA
  • temperature minus pounds of air per second divided by release rate squared
  • PSIG

22: 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
  • outside the machinery room
  • boiler
  • evaporator

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

  • 24
  • 48
  • 18
  • 36

24: How many different groups of refrigerants are there?

  • 11
  • 3
  • 15
  • 7

25: How are refrigerant blends classified?

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