Topics: ASHRAE/CMR
1: 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
2: Industrial occupancy is
- a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
- is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- Both a and b are correct
3: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall include closets used for setting equipment
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-113
- R-12
- R-22
5: 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
6: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UM” and “UV”
- “UV”
- “U” or “UM”
- “UL”
7: Pipe identification labels are required when the system contains more than
- 55 lbs
- 110 lbs
- 65 lbs
- 120 lbs
8: 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
9: How are refrigerant blends classified?
- Based on best case Fractionation
- Based on worst case fractionation
- Blends don't have to be classified
- Based on the oil used
10: A hotel is considered a _______ occupancy.
- residential
- mercantile
- commercial
- institutional
11: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
12: What type of material can't be used on the outlet of a relief valve?
- Magnesium alloy
- Stainless steel
- Copper
- PVC
13: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- between the compressor and oil separator
- on top of the condensor
- between the compressor and the stop valve
14: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
15: 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 have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system less than 1,000 lbs
16: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
17: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Copper
- Aluminum
- Stainless Steel
18: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-11
- R-113
- R-12
19: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Zinc
- Aluminum
- Magnesium
20: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
21: R-123 belongs to Group
- A-3
- B-1
- B-3
- B-2
22: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 330
- 100
- 150
23: Who approves containers for refrigerants?
- D.O.D
- D.O.T
- D.O.E
- E.P.A
24: A restaurant is classified as a
- public assembly occupancy
- mixed occupancy
- large mercantile occupancy
- commercial occupancy
25: Direct systems using Group II refrigerants
- 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
- shall be allowed to be used for human comfort.