Topics: ASHRAE/CMR
1: Refrigerants shall be classified by
- color codes
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
2: R-717 is
- carbon dioxide
- water
- trichloromethane
- ammonia
3: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 5.5
- 2.5
- 3.0
- 2.0
4: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- lower
- higher
- there is no Group B1 refrigerants
- the same
5: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- lower
- the same
- higher
6: What is the refrigerant chlorodifluoromethane?
- R-22
- R-134a
- R-123
- R-12
7: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Industrial
- Place of assembly
- Instituional
8: A class B1 refrigerant is considered
- non-toxic but highly flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic but non-flammable
9: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- tight fitting doors
- automatic ventilation
- self-closing doors
10: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
11: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- installed through a pipe casing
- moisture barrier
- leak checked
12: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
13: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 3
- 5
- 1
- 2
14: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When its white
- When it's used as part of a supply or return air system
- When there are sprinklers above
15: Which refrigerant replaced R-12?
- R-410A
- R-22
- R-407A
- R-134A
16: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 2 months
- 14 days
- 1 week
17: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 3/32"
- 1/8"
- 5/16"
18: Pressure vessels having an inside diameter of 6” or less shall be protected by
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a fusible plug
- a pressure relief device
19: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
- the outdoors
20: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
21: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-2
- B-2
- B-1
- A-1
22: A movie theater would be considered a
- institutional occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
23: The Department that certifies the transportation of refrigerant is the
- RSES
- EPO
- EPA
- DOT
24: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
25: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 18
- 15
- 24