ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A professional or office building would be considered what type of occupancy?

  • commercial
  • business
  • mercantile
  • public assembly

2: Can you use Ammonia in industrial applications?

  • When mixed with R-718
  • No, never
  • Yes, always
  • Yes, Under certain condidtions

3: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

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

5: Class T machine room

  • shall have remote controls to stop the action of the refrigerant compressor
  • shall include closets used for setting equipment
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed

6: 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

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

  • Stainless steel
  • Copper
  • Magnesium alloy
  • PVC

8: 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 RX-11
  • Flush with R-11

9: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 80%
  • 99%
  • 75%
  • 90%

10: What section governs pressure vessels?

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

11: 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
  • illegal occupancy
  • public assembly occupancy

12: Halogen refrigerants are corrosive to which type of metal?

  • stainless steel
  • copper
  • magnesium
  • black iron

13: Machinery rooms must be vented to ______?

  • neutralizing tank
  • basement
  • unoccupied spaces
  • outdoors

14: How many groups of refrigerants are there?

  • 7
  • 5
  • 3
  • 1

15: What pipe can not be used for refrigeration?

  • K
  • N
  • L
  • M

16: What refrigerant were phased out in 2004?

  • R-11
  • R-22
  • R-12
  • R-134a

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

  • 10
  • 100
  • 50
  • 1

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

  • Stainless Steel
  • Aluminum
  • PVC
  • Copper

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

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

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

  • R-718
  • R-422A
  • R-134A
  • R-717

21: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

22: When must refrigeration system covered by the code be inspected?

  • Not required
  • Annually and when installed
  • Annually
  • Upon installation

23: A positive displacement compressor is

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

24: R-11 belongs to Group

  • B-3
  • B-1
  • A-2
  • A-1

25: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • lower
  • there is no Group B1 refrigerants
  • the same
  • higher