Topics: ASHRAE/CMR
1: How many different groups of refrigerants are there?
- 3
- 15
- 7
- 11
2: Joints in refrigeration piping must be _____ before being covered?
- Insulated
- Pressurized
- Inspected
- Leak tested
3: What is an egress?
- An entrance or exit
- An escape route
- A valve put on the low side of the system to prevent frosting
- A code violation
4: Ammonia belongs to Group
- A-1
- B-2
- B-1
- A-2
5: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class T machinery room
- Class B machinery room
- Class M machinery room
- Class A machinery room
6: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
7: What refrigerant doesn't have to be classifted?
- R-717
- R-134a
- R-711
- R-718
8: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
9: R-22 falls under which safety classification?
- A-2
- A-1
- B-2
- B-1
10: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 50
- 18
- 22
11: What would be the classification for Stop & Shop grocery store?
- Industrial
- Place of assembly
- Large mercantile
- Instituional
12: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
13: What refrigerant is an inorganic compound?
- Ammonia
- R-22
- R-410A
- R-132A
14: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- design pressure
- critical pressure
- low pressure
15: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
16: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- 6'
- Ceiling height
- 7.25'
17: 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
18: 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.
- 25
- 10
- 20
- 15
19: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
- outside the room, immediately adjacent to each door
20: A class B2 refrigerant is considered
- non-toxic and non-flammable
- toxic and non-flammable
- non-toxic and highly flammable
- toxic and somewhat flammable
21: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 500 lbs
- 55 lbs
- 330 lbs
22: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
23: What pipe can not be used for refrigeration?
- L
- N
- M
- K
24: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 100
- 90
- 110
- 80
25: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and reciever
- between the compressor and oil separator
- between the compressor and the stop valve