ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • B-2
  • A-3
  • C-3
  • A-1

2: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class M machinery room
  • Class T machinery room
  • Class A machinery room
  • Class B machinery room

3: What type of relief valve is used on a CO2 system?

  • gate valve
  • glove disc
  • rupture disc
  • fusible plug

4: R-410A is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • B-1
  • A-2
  • A-1

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

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

6: What must be done if refrigeration lines pass through a concrete floor?

  • moisture barrier
  • installed through a pipe casing
  • leak checked
  • insulated

7: 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

8: Each machinery room shall contain

  • 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
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements

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

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

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

  • Copper
  • PVC
  • Stainless Steel
  • Aluminum

11: A movie theater would be considered a

  • commercial occupancy
  • public assembly occupancy
  • mixed occupancy
  • institutional occupancy

12: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

13: What type refrigerant is NOT ozone depleting?

  • HCFC
  • CFC
  • HFC
  • Halon

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

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

15: Refrigeration piping before being buried shall be

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

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

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

17: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

18: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 330 lbs.
  • 660 lbs
  • 55 lbs
  • 550 lbs

19: How many refrigerant classifications are there for flammability?

  • 2
  • 7
  • 1
  • 3

20: Ammonia is under what safety classification?

  • B3
  • A3
  • B2
  • B1

21: 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

22: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Temperature limiter device
  • Relief valve
  • Circuit Breaker
  • T&P device

23: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • institutional occupancy
  • commercial occupancy
  • mixed occupancy
  • public assembly occupancy

24: Class 3 refrigerants are

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

25: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber