Topics: ASHRAE/CMR
1: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UL and UM
- UV or UR
- UL and UR
2: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
3: Class A refrigerants are considered
- toxic
- flammable
- non-flammable
- non-toxic
4: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
5: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 18
- 15
- 10
6: All electrical work done on refrigeration systems must comply with
- ASHREA-15 Section 9.2.1
- NEC and Massachusetts Modifications
- OSHA
- Department of Energy
7: Who approves containers for refrigerants?
- E.P.A
- D.O.T
- D.O.E
- D.O.D
8: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
9: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
10: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
11: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
12: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
13: How many different groups of refrigerants are there?
- 7
- 3
- 15
- 11
14: Machinery rooms must be vented to ______?
- outdoors
- neutralizing tank
- unoccupied spaces
- basement
15: What refrigerant doesn't have to be classifted?
- R-134a
- R-718
- R-717
- R-711
16: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- Notify the Fire Marshal that the system has been inspected and approved
- There is a temporary shut-down until a final inspection can be performed.
17: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
- When there are sprinklers above
18: Which refrigerant class listed below is the most flammable?
- B2
- A2
- C3
- A3
19: Stop valves shall not be permitted between the system and the
- bleed valve
- service valve
- condenser
- relief valve
20: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and somewhat flammable
- toxic and non-flammable
- non-toxic and non-flammable
21: 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
22: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
23: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-2
- A-1
- B-2
- B-1
24: How many groups of refrigerants are there?
- 5
- 7
- 3
- 1
25: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above