Topics: ASHRAE/CMR
1: Ammonia is under what safety classification?
- A3
- B1
- B2
- B3
2: What is R-22?
- Chlorodifluoromethane
- Chlorofluoromethane
- HFC
- CCFCM
3: What section governs pressure vessels?
- OSHA
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
- Section 1 ASHREA 15 ASME fired
4: How many gallons of water per pound of ammonia do you need?
- 15
- 20
- 1
- 5
5: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
6: R-22 is considered a(n)
- HCFC
- CFC
- HFC
- HCFCH
7: How are refrigerant blends classified?
- Based on best case Fractionation
- Based on worst case fractionation
- Based on the oil used
- Blends don't have to be classified
8: 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
9: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Insulated and cross broke
- Welded and seamed.
- Flanged and gasketed
10: R-717 is
- water
- ammonia
- carbon dioxide
- trichloromethane
11: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 75%
- 80%
- 99%
- 90%
12: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- evaporator
- outside the machinery room
- compressor
- boiler
13: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs
- 55 lbs
- 660 lbs
- 500 lbs
15: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Industrial
- Place of assembly
- Instituional
16: What refrigerant doesn't have to be classifted?
- R-711
- R-717
- R-134a
- R-718
17: Most CFC's are
- inert but toxic
- toxic
- inert
- flammable
18: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- quarterly
- bi-annually
- annually
- regularly
19: A class B1 refrigerant is considered
- non-toxic and non-flammable
- non-toxic but highly flammable
- toxic and somewhat flammable
- toxic but non-flammable
20: A relief valve discharge capacity is rated in
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
- PSIA
21: 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
22: All electrical work done on refrigeration systems must comply with
- OSHA
- NEC and Massachusetts Modifications
- Department of Energy
- ASHREA-15 Section 9.2.1
23: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Nickel
- Zinc
- Copper
24: How many gallons of water do you need per pound of ammonia?
- 10
- 1
- 50
- 100
25: NH3 is
- R-508A
- ammonia
- lithium bromide
- R-718