ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • B-1
  • A-2
  • A-1

2: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

3: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • pressure relief device
  • zone valve
  • high limit control

4: What is the minimum height refrigeration piping should be placed against walls?

  • 7.25'
  • 72"
  • Ceiling height
  • 6'

5: Class T machine room

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

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

  • A-1
  • B-1
  • A-2
  • B-2

7: Direct systems using Group II refrigerants

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

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

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

9: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When it's used as part of a supply or return air system
  • When its white
  • When there are sprinklers above
  • When there is a space 6' or more above it

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

  • A-1
  • A-3
  • C-3
  • B-2

11: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

12: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within

  • 2 months
  • 1 week
  • 14 days
  • 30 days

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

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

14: 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

15: Ammonia is under what safety classification?

  • B1
  • A3
  • B2
  • B3

16: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

17: What pipe can not be used for refrigeration?

  • K
  • M
  • L
  • N

18: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • mercantile occupancy
  • business occupancy
  • public assembly occupancy.
  • commercial occupancy

19: 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.

20: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

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

21: Who is permitted to access a refrigeration machine room?

  • Any employee
  • Contractors only
  • Authorized persons only
  • Anyone, it's a completely safe area

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

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

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

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

24: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

25: 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 will enter the occupied space
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system