Topics: ASHRAE/CMR
1: 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
2: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
3: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
4: What is Trichlorotrifluoromethane?
- R-113
- R-12
- R-13
- R-11
5: Most CFC's are
- inert but toxic
- flammable
- toxic
- inert
6: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
7: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 2.0
- 2.5
- 3.0
8: What is the refrigerant chlorodifluoromethane?
- R-12
- R-22
- R-134a
- R-123
9: 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
10: What is R-22?
- HFC
- Chlorodifluoromethane
- Chlorofluoromethane
- CCFCM
11: How many gallons of water do you need per pound of ammonia?
- 1
- 50
- 10
- 100
12: How many flammability classifications are refrigerants in?
- 7
- 2
- 3
- 5
13: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- There is a temporary shut-down until a final inspection can be performed.
- Notify the Fire Marshal that the system has been inspected and approved
14: Class T machine room
- shall include closets used for setting equipment
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
- shall have refrigerant leak detecting systems installed inside and outside the room
15: What pipe can not be used for refrigeration?
- K
- L
- N
- M
16: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a fusible plug
17: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
18: The Board of Boilers adopts by reference
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
- Montreal Protocol Safety Code
- MSCA Code
19: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Copper
- Aluminum
- Zinc
20: How many groups of refrigerants are there?
- 7
- 3
- 1
- 5
21: What section governs pressure vessels?
- OSHA
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
22: R-22 falls under which safety classification?
- A-1
- B-2
- A-2
- B-1
23: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
24: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 20
- 1
25: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1
- 1.5
- 2.2
- 1.2