Topics: ASHRAE/CMR
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