Topics: ASHRAE/CMR
1: How far from the ground does a relief valve need to be?
- At least 25' above grade
- At least 15' above grade
- Not more than 3' above grade
- At least 20' above grade
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 happens after your initial inspection of a pressure vessel?
- Notify the AHJ to let them know that the system been inspected
- Notify the Fire Marshal that the system has been inspected and approved
- Inspector leaves a metal tag with a certification listed on it
- There is a temporary shut-down until a final inspection can be performed.
4: Can you use Ammonia in industrial applications?
- Yes, always
- When mixed with R-718
- Yes, Under certain condidtions
- No, never
5: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
6: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 18
- 33
7: When must refrigeration system covered by the code be inspected?
- Not required
- Upon installation
- Annually and when installed
- Annually
8: 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
9: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 6.6 lbs
- 44 lbs
- 13.9 lbs
- 22 lbs
10: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
11: 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.
- 350
- 400
- 100
- 250
12: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 5/16"
- 3/32"
- 1/8"
13: A restaurant is classified as a
- large mercantile occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
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: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- higher
- the same
- lower
16: What type of relief valve is used on a CO2 system?
- gate valve
- glove disc
- rupture disc
- fusible plug
17: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
18: 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
19: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 15 cubic feet or more
- 3 cubic feet or less
- 15 square feet or less
20: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall be allowed to be used for human comfort.
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort
21: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.5
- 1.2
- 2.2
- 1
22: Which refrigerant class listed below is the most flammable?
- A-3
- A-1
- C-3
- B-2
23: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
24: 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.
25: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- low pressure
- high pressure
- design pressure