Topics: ASHRAE/CMR
1: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
2: Who approves containers for refrigerants?
- D.O.E
- D.O.D
- E.P.A
- D.O.T
3: How many flammability classifications are refrigerants in?
- 5
- 3
- 2
- 7
4: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- public assembly occupancy
- mixed occupancy
- commercial occupancy
- institutional occupancy
5: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-22
- R-11
- R-12
- R-113
6: When an inspection is needed, how often must it be done?
- every 24 months
- every 36 months
- every 18 months
- annually
7: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
8: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
9: 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
10: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 90%
- 80%
- 100%
- 75%
11: What happens after your initial inspection of a pressure vessel?
- 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.
- Notify the AHJ to let them know that the system been inspected
12: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- there is no Group B1 refrigerants
- the same
- higher
- lower
13: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 75%
- 99%
- 90%
14: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UL and UR
- UV or UR
- UM or UL
15: Ammonia can come in contact with _______ ?
- Aluminum
- Copper
- Copper tubing
- Brass
16: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
17: What refrigerant were phased out in 2004?
- R-11
- R-12
- R-134a
- R-22
18: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall be inspected by the Boiler of Inspectors bi-annually
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
- shall have a pressure limiting device installed on the high side of the system
19: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
20: What would be the classification for Stop & Shop grocery store?
- Industrial
- Place of assembly
- Large mercantile
- Instituional
21: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 14 days
- 30 days
- 2 months
- 1 week
22: What do you need to do when you install a new system?
- Have it inspected
- Insulate the suction line before you take a superheat reading
- Add refrigerant
- Document the superheat and subcooling reading
23: Where must a refrigeration contractor's license number be displayed?
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
24: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
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