Topics: ASHRAE/CMR
1: When an inspection is needed, how often must it be done?
- annually
- every 18 months
- every 24 months
- every 36 months
2: What is R-22?
- HFC
- Chlorodifluoromethane
- CCFCM
- Chlorofluoromethane
3: How many gallons of water per pound of ammonia do you need?
- 15
- 20
- 1
- 5
4: What type of copper is not permitted on refrigeration systems?
- Type N
- Type M
- Type K
- Type L
5: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 24
- 48
- 18
6: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-12
- R-11
- R-22
- R-113
7: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- relief plug
- fusion plug
- rupture plug
- fusible plug
8: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device and a pressure relief valve installed
- 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
9: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Circuit Breaker
- T&P device
- Temperature limiter device
- Relief valve
10: When must refrigeration system covered by the code be inspected?
- Upon installation
- Annually and when installed
- Not required
- Annually
11: 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
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
12: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the vapor side of the system
- high side of the system
- the liquid side of the system
- low side of the system
13: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
14: What refrigerant is an inorganic compound?
- R-132A
- R-410A
- Ammonia
- R-22
15: R-123 belongs to Group
- B-3
- B-1
- B-2
- A-3
16: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
17: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
18: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Locked doors
- Well-lit exit signs
- OSHA approved
19: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 550 lbs
- 330 lbs.
- 660 lbs
20: R-22 is considered a(n)
- CFC
- HCFC
- HCFCH
- HFC
21: A High-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
22: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless steel
- Aluminum
- Copper
23: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
24: How many groups of refrigerants are there?
- 7
- 1
- 5
- 3
25: 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.