Topics: ASHRAE/CMR
1: What type of copper is not permitted on refrigeration systems?
- Type N
- Type L
- Type M
- Type K
2: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- OSHA
- Department of Energy
- ASHREA-15 Section 9.2.1
3: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 40'
- At least 20'
- There is no minimum for relief valve and windows.
- At least 30'
4: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- compressor
- evaporator
- boiler
- outside the machinery room
5: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
6: 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
7: What refrigerant is an inorganic compound?
- R-22
- R-410A
- Ammonia
- R-132A
8: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
9: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 330 lbs
- 660 lbs
- 55 lbs
10: A class A3 refrigerant is considered
- non-toxic but highly flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
11: 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
12: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
13: Who authorizes changes to the safety codes?
- Contractor who last serviced the system.
- Person in charge of the facility
- Board of Boilers
- Person who pulled the permit
14: B3 refrigerants are considered
- non-toxic but non-flammable
- toxic and highly flammable
- toxic but non-flammable
- non-toxic but flammable
15: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort
16: How many refrigerant classifications are there for toxicity?
- 1
- 5
- 2
- 3
17: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- PVC
- Copper
18: NH3 is
- R-508A
- R-718
- ammonia
- lithium bromide
19: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
20: 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
- 250
- 100
21: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
22: High pressure controls should be set no higher than
- 90% of set point
- 10% of set point
- 80% of set point
- 25% of set point
23: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- inside the room, immediately adjacent to each door
24: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection
- over pressure protection and a rupture disc
25: When air is ducted through a machine room that services occupied space, What must be done?
- Insulated and cross broke
- Welded and seamed.
- Flanged and gasketed
- Ducted and sealed