Topics: ASHRAE/CMR
1: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
2: All electrical work done on refrigeration systems must comply with
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
- OSHA
- Department of Energy
3: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Stop valve
- Muffler
- Foot valve
- Moisture indicator
4: Class T machine room
- shall include closets used for setting equipment
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
5: Can you use Ammonia in industrial applications?
- When mixed with R-718
- No, never
- Yes, Under certain condidtions
- Yes, always
6: A hotel is considered a _______ occupancy.
- residential
- mercantile
- commercial
- institutional
7: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
8: A relief valve shall be located at least ___ above grade.
- 10'
- 36'
- 25'
- 15'
9: 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
10: How many refrigerant classifications are there for toxicity?
- 1
- 5
- 2
- 3
11: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 75%
- 80%
- 90%
- 99%
12: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.2
- 2.2
- 1.5
- 1
13: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 50
- 18
- 33
14: A High-Probablity 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 from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
15: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 22
- 25
- 50
16: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 3.0, 3.5
- 2.5, 2.5
- 6.6, 6.6
- 2.5, 3.0
17: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Zinc
- Copper
- Aluminum
18: B3 refrigerants are considered
- non-toxic but flammable
- toxic and highly flammable
- toxic but non-flammable
- non-toxic but non-flammable
19: Ammonia is under what safety classification?
- B1
- B2
- B3
- A3
20: The certificate of inspection
- shall be posted on the compressor shell or electrical panel at the unit
- shall be authorized by a notarized insurance company
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
21: 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
- boiler
- compressor
- evaporator
- outside the machinery room
22: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
23: Machinery rooms must be vented to ______?
- outdoors
- unoccupied spaces
- basement
- neutralizing tank
24: What is Trichlorotrifluoromethane?
- R-12
- R-11
- R-13
- R-113
25: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c