ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

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

  • Aluminum
  • Magnesium
  • Copper
  • Zinc

3: Pressure relief valves shall be marked with the data from

  • Section VIII Division of the ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code
  • Section XIII Division of the ASME Boiler & Pressure Code

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

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

5: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 550
  • 100
  • 50
  • 350

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: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

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

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

9: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

10: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the liquid side of the system
  • the vapor side of the system
  • low side of the system
  • high side of the system

11: Which refrigerant(s) is an HFC?

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

12: What would be the classification for Stop & Shop grocery store?

  • Industrial
  • Place of assembly
  • Large mercantile
  • Instituional

13: A class A3 refrigerant is considered

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

14: Liquid level gauges must be provided with what?

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

15: What must be done to refrigerant pipes before being buried?

  • Leaked checked
  • Encased
  • Coated
  • Certified

16: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection as well as a temperature protection device
  • over pressure protection and a rupture disc

17: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system less than 1,000 lbs
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room
  • shall be used for mechanical equipment only
  • shall be used in refrigeration system in excess of 1,000 lbs

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

  • A-1
  • B-1
  • B-2
  • A-2

19: What is not a requirement of a class T machine room?

  • tight fitting doors
  • fire hose connection to the building fire protection system
  • self-closing doors
  • automatic ventilation

20: Class T machine room

  • 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
  • has no flame producing apparatus permanently installed

21: The color code of a tank of ammonia is

  • white
  • lavender
  • silver
  • light green

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

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

23: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

24: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

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

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