Topics: ASHRAE/CMR
1: The discharge relief valve is located (9.4.6)
- between the compressor and the stop valve
- on top of the condensor
- between the compressor and oil separator
- between the compressor and reciever
2: 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
3: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- Ceiling height
- 72"
- 6'
4: How much clearance do you need around the perimeter of electrical panels?
- 12"
- 24"
- 18"
- 36"
5: A class B2 refrigerant is considered
- toxic and non-flammable
- non-toxic and highly flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
6: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- black iron
- magnesium
- copper
7: 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.
- 100
- 400
- 350
- 250
8: R-22 is considered a(n)
- HCFC
- HFC
- CFC
- HCFCH
9: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- No, never
- Yes, always
- When mixed with R-718
10: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- III
- 10
- 15
11: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- Temperature limiter device
- T&P device
- Circuit Breaker
12: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 75%
- 90%
- 100%
13: How many refrigerant classifications are there for flammability?
- 2
- 3
- 1
- 7
14: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
15: 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
- boiler
- outside the machinery room
- compressor
- evaporator
16: 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
17: 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.
- 15
- 75
- 50
- 55
18: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 50
- 20
- 75
- 15
19: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Gate valve
- Fusible plug
- Rupture disk
20: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's a non-flammable refrigerant
- Because it's cheap
- Because it's water
- R-718 is not rated unlimited because it's a dangerous refrigerant
21: What refrigerant doesn't have to be classifted?
- R-134a
- R-711
- R-718
- R-717
22: R-11 belongs to Group
- B-3
- A-1
- B-1
- A-2
23: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UV or UR
- UL and UR
- UM or UL
24: 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
25: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above