Topics: ASHRAE/CMR
1: R-11 belongs to Group
- A-2
- B-1
- B-3
- A-1
2: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
3: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device installed on the high side of the system
- shall have a pressure limiting device and a pressure relief valve installed
4: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
5: What is the refrigerant dichlorodifluoromethane?
- R-134A
- R-22
- R-123
- R-12
6: A class B1 refrigerant is considered
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
7: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- business occupancy
- mercantile occupancy
- commercial occupancy
8: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 3 cubic feet or less
- 15 cubic feet or more
- 15 square feet or less
9: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Flammability and toxicity
- Temperature range and hazardousness
- Weight and color
10: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
11: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
- the outdoors
- the return air ducted system
12: Which refrigerant replaced R-12?
- R-134A
- R-22
- R-407A
- R-410A
13: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- PSIA
- temperature minus pounds of air per second divided by release rate squared
- PSIG
14: R-717 is
- trichloromethane
- water
- carbon dioxide
- ammonia
15: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 10
- 25
- 15
16: The Department that certifies the transportation of refrigerant is the
- RSES
- DOT
- EPA
- EPO
17: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 10
- 15
- 25
- 20
18: How many gallons of water do you need per pound of ammonia?
- 100
- 1
- 10
- 50
19: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 3/32"
- 1/16"
- 1/8"
20: How are refrigerant blends classified?
- Based on best case Fractionation
- Based on the oil used
- Blends don't have to be classified
- Based on worst case fractionation
21: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 100,000
- 100
- 1,000
22: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UL and UR
- UV or UR
23: Pressure relief valves shall be marked with the data from
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
24: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 110
- 6.6
- 330
- 1,000
25: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above