Topics: ASHRAE/CMR
1: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-502
- R-11
- R-12
2: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
3: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
4: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- 72"
- 6'
- Ceiling height
5: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually and when installed
- Not required
- Annually
6: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
7: 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
8: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
9: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
10: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 350
- 100
- 400
- 250
11: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
12: When an inspection is needed, how often must it be done?
- annually
- every 36 months
- every 24 months
- every 18 months
13: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
14: 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
15: What refrigerant doesn't have to be classified?
- R-717
- R-422A
- R-134A
- R-718
16: Pipe identification labels are required when the system contains more than
- 110 lbs
- 55 lbs
- 120 lbs
- 65 lbs
17: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- commercial occupancy
- public assembly occupancy
- institutional occupancy
- mixed occupancy
18: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
- you can't change refrigerants
- place sign, check for leaks, insulate
19: Ammonia is under what safety classification?
- A3
- B2
- B3
- B1
20: 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
21: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and reciever
- between the compressor and oil separator
22: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 50
- 55
- 75
- 15
23: When a refrigeration or air conditioning system is installed
- it shall not be operated below prescribed pressures
- a field inspection shall be made before it is put into service
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
24: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
25: A hotel is considered a _______ occupancy.
- commercial
- institutional
- residential
- mercantile