Topics: ASHRAE/CMR
1: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
2: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- leak checked
- moisture barrier
- insulated
3: What type of relief valve is used on a CO2 system?
- gate valve
- glove disc
- rupture disc
- fusible plug
4: When a refrigerating machinery room is used, the emergency procedures shall be posted
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
5: R-11 belongs to Group
- A-2
- A-1
- B-1
- B-3
6: When air is ducted through a machine room that services occupied space, What must be done?
- Insulated and cross broke
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
7: What refrigerant is an inorganic compound?
- R-410A
- R-132A
- Ammonia
- R-22
8: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
9: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- the outdoors
- the return air ducted system
- Machinery rooms need not be vented
10: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-123
- R-12
- R-22
11: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
12: Large mercantile occupancy is
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
13: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
14: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Tight fitting doors
- Fire hose connected to the building fire protection system.
- Self-closing doors
15: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
16: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
17: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
18: What refrigerant doesn't have to be classifted?
- R-711
- R-134a
- R-717
- R-718
19: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices or fusible plugs
20: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
21: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- there is no Group B1 refrigerants
- lower
- the same
22: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-113
- R-12
- R-11
23: How much refrigerant can be stored in a mechanical room outside of the system?
- 100
- 330
- 200
- 150
24: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
25: Liquid level gauges must be provided with what?
- A relief valve
- A red line
- Automatic shut-offs
- A low level mark