Topics: ASHRAE/CMR
1: 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
2: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 cubic feet or more
- 15 square feet or less
- 3 cubic feet or more
3: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 9.00'
- 8'4"
- 7.25'
- 7.00'
4: R-22 falls under which safety classification?
- A-2
- A-1
- B-2
- B-1
5: A relief valve shall be located at least ___ above grade.
- 25'
- 10'
- 15'
- 36'
6: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 15'
- 25'
- 20'
7: NH3 is
- lithium bromide
- R-718
- ammonia
- R-508A
8: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
9: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
10: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
11: All electrical work done on refrigeration systems must comply with
- Department of Energy
- ASHREA-15 Section 9.2.1
- OSHA
- NEC and Massachusetts Modifications
12: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- mixed occupancy
- large mercantile occupancy
13: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- ammonia
- HCFC-123
- Lithium bromide
14: What does safe access mean?
- Locked doors
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- OSHA approved
15: 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
16: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-2
- B-2
- B-1
- A-1
17: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-22
- R-11
- R-12
- R-113
18: Ammonia (NH3) is a group III refrigerant
- True
- False
19: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- MSCA Code
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
20: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
21: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
22: Can you use Ammonia in industrial applications?
- No, never
- Yes, always
- Yes, Under certain condidtions
- When mixed with R-718
23: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
24: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 1
- 20
25: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's a non-flammable refrigerant
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's water
- Because it's cheap