Topics: ASHRAE/CMR
1: What pipe can not be used for refrigeration?
- L
- M
- N
- K
2: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- public assembly occupancy
- institutional occupancy
- commercial occupancy
- mixed occupancy
3: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
4: What must be done to refrigerant pipes before being buried?
- Certified
- Leaked checked
- Coated
- Encased
5: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 75
- 55
- 50
6: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used for mechanical equipment only
- shall be used in refrigeration system less than 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
7: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-11
- R-12
- R-113
8: Can ammonia be used on domestic system?
- yes, for systems under 10 tons
- no
- yes
- no, unless there is proper ventilation system installed
9: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the high side
- the aggregate of the high side and low side
- 2.5 times the design pressure
- the low side
10: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 48
- 36
- 18
11: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
12: How far from the ground does a relief valve need to be?
- At least 15' above grade
- Not more than 3' above grade
- At least 20' above grade
- At least 25' above grade
13: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Temperature limiter device
- Relief valve
- Circuit Breaker
14: Halogenated refrigerants cannot be used with what material?
- Stainless steel
- Magnesium alloy
- Aluminum
- Copper
15: Relief valves are rated in
- gallons of water per hour
- gallons of water per minute
- pounds of air per minute
- pounds of air per hour
16: Liquid level gauges must be provided with what?
- A relief valve
- A low level mark
- Automatic shut-offs
- A red line
17: 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.
18: Pressure vessels having an inside diameter of 6” or less shall be protected by
- either a fusible plug or a pressure relief device
- a fusible plug
- a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
19: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- A group sensing
- phosgene gas sening
- refrigerant sensing
- CO Sensing
20: 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.
- 80
- 110
- 90
- 100
21: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 100
- 350
- 50
22: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
23: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 30 days
- 1 week
- 14 days
24: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
- 15 cubic feet or more
25: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
- shall include closets used for setting equipment