Topics: ASHRAE/CMR
1: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there are sprinklers above
- When it's used as part of a supply or return air system
- When its white
- When there is a space 6' or more above it
2: 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
3: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
4: 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
5: When should a relief valve start to function?
- Before the purge station discharges
- Two times it's working pressure
- At it's set pressure
- 10 psi before it's set pressure
6: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
7: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
8: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
9: The color code of a tank of ammonia is
- white
- light green
- silver
- lavender
10: Ammonia is under what safety classification?
- B1
- A3
- B3
- B2
11: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
12: A class B1 refrigerant is considered
- toxic and somewhat flammable
- toxic but non-flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
13: What is the refrigerant dichlorodifluoromethane?
- R-22
- R-12
- R-123
- R-134A
14: Relief valves are rated in
- gallons of water per minute
- gallons of water per hour
- pounds of air per hour
- pounds of air per minute
15: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
16: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
17: What refrigerant doesn't have to be classifted?
- R-134a
- R-717
- R-711
- R-718
18: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 18
- 15
- 10
19: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 330
- 1,000
- 110
20: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the authorized person
- Approved by the installing contractor
21: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
- Nothing must be done
22: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Circuit Breaker
- Temperature limiter device
- Relief valve
23: 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
24: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- 10
- 15
- III
25: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above