Topics: ASHRAE/CMR
1: Can ammonia be used on domestic system?
- yes
- no
- yes, for systems under 10 tons
- no, unless there is proper ventilation system installed
2: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 66
- 22
- 25
3: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
- PSIG
- PSIA
4: What is R-22?
- Chlorodifluoromethane
- HFC
- Chlorofluoromethane
- CCFCM
5: The Board of Boilers adopts by reference
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- MSCA Code
- Montreal Protocol Safety Code
6: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device and a pressure relief valve installed
- shall be inspected by the Boiler of Inspectors bi-annually
- does not require a pressure-limiting device
- shall have a pressure limiting device installed on the high side of the system
7: Most CFC's are
- toxic
- flammable
- inert but toxic
- inert
8: 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
9: Machinery rooms must be vented to ______?
- neutralizing tank
- unoccupied spaces
- basement
- outdoors
10: R-22 falls under which safety classification?
- B-1
- A-1
- B-2
- A-2
11: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there are sprinklers above
- When its white
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
12: What must be done if refrigeration lines pass through a concrete floor?
- moisture barrier
- installed through a pipe casing
- leak checked
- insulated
13: The color code of a tank of ammonia is
- silver
- white
- lavender
- light green
14: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UR
- UL and UM
- UM or UL
- UV or UR
15: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100
- 100,000
- 10,000
- 1,000
16: What type of copper is not permitted on refrigeration systems?
- Type M
- Type N
- Type L
- Type K
17: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the vapor side of the system
- high side of the system
- the liquid side of the system
- low side of the system
18: NH3 is
- R-718
- lithium bromide
- R-508A
- ammonia
19: Refrigerant restricted in 2004 but used for transition for decades:
- R-134A
- R-22
- R-123
- R-11
20: R-11 belongs to Group
- A-2
- B-1
- B-3
- A-1
21: Class T machine room
- has no flame producing apparatus permanently installed
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
22: A professional or office building would be considered what type of occupancy?
- commercial
- business
- public assembly
- mercantile
23: 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
24: What is the refrigerant chlorodifluoromethane?
- R-12
- R-22
- R-123
- R-134a
25: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- bi-annually
- regularly
- quarterly