Topics: ASHRAE/CMR
1: Ammonia belongs to Group
- B-2
- B-1
- A-2
- A-1
2: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 600F
- 700F
- 800F
3: Pipe identification labels are required when the system contains more than
- 65 lbs
- 120 lbs
- 55 lbs
- 110 lbs
4: Which refrigerant class listed below is the most flammable?
- A-1
- A-3
- C-3
- B-2
5: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- tight fitting doors
- self-closing doors
- automatic ventilation
6: A restaurant is classified as a
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
- commercial occupancy
7: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
8: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 100
- 350
- 50
9: 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
- evaporator
- outside the machinery room
- compressor
10: What refrigerant doesn't have to be classifted?
- R-134a
- R-718
- R-711
- R-717
11: When must refrigeration system covered by the code be inspected?
- Not required
- Annually
- Annually and when installed
- Upon installation
12: Class 3 refrigerants are
- toxic
- non-toxic
- highly flammable
- non-flammable
13: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
14: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class A machinery room
- Class T machinery room
- Class B machinery room
15: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
16: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Insulated and installed in a pipe duct (Encased)
- Leak checked
- Classifed
17: R-22 is considered a(n)
- HFC
- CFC
- HCFC
- HCFCH
18: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-134A
- R-11
19: _____ and its alloys are suitable for use with ammonia systems.
- Zinc
- Copper
- Magnesium
- Aluminum
20: Class A refrigerants are considered
- toxic
- flammable
- non-toxic
- non-flammable
21: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
22: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 2 months
- 30 days
- 1 week
- 14 days
23: What is R-22?
- Chlorofluoromethane
- HFC
- Chlorodifluoromethane
- CCFCM
24: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
25: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False