Topics: ASHRAE/CMR
1: A hotel is considered a _______ occupancy.
- commercial
- institutional
- mercantile
- residential
2: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Certified
- Classifed
3: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
4: 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
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: What is not a requirement of a class T machine room?
- automatic ventilation
- self-closing doors
- fire hose connection to the building fire protection system
- tight fitting doors
7: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 25
- 66
8: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Aluminum
- Copper
9: Can ammonia be used on domestic system?
- yes, for systems under 10 tons
- yes
- no, unless there is proper ventilation system installed
- no
10: The Department that certifies the transportation of refrigerant is the
- EPO
- DOT
- EPA
- RSES
11: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
12: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Magnesium
- Aluminum
- Zinc
13: Indirect systems using Group II refrigerants
- shall be used for mechanical equipment only
- shall be used in refrigeration system in excess of 1,000 lbs
- 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
14: 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
15: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 1 week
- 14 days
- 30 days
16: 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
- outside the machinery room
- boiler
- evaporator
17: How many gallons of water do you need per pound of ammonia?
- 1
- 100
- 50
- 10
18: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 80
- 100
- 110
19: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 75%
- 80%
- 90%
- 100%
20: What kind of material can't be used on the outlet of a relief valve?
- Aluminum
- Copper
- Stainless Steel
- PVC
21: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- low limit control
- zone valve
- pressure relief device
22: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
23: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
24: All electrical work done on refrigeration systems must comply with
- Department of Energy
- NEC and Massachusetts Modifications
- OSHA
- ASHREA-15 Section 9.2.1
25: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- higher
- the same
- lower