Topics: ASHRAE/CMR
1: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 700F
- 600F
- 1000F
- 800F
2: What type of copper is not permitted on refrigeration systems?
- Type L
- Type M
- Type N
- Type K
3: Class 3 refrigerants are
- non-toxic
- highly flammable
- non-flammable
- toxic
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-113
- R-12
- R-22
- R-11
5: How many refrigerant classifications are there for flammability?
- 3
- 1
- 2
- 7
6: 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
- 350
- 100
- 50
7: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
8: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 13.9 lbs
- 44 lbs
- 22 lbs
- 6.6 lbs
9: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- no flames shall be permitted
- gas masks must be worn
- explosion precautions must be taken
- the owner shall be informed
10: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
11: How many different groups of refrigerants are there?
- 7
- 15
- 3
- 11
12: R-11 belongs to Group
- A-1
- B-3
- B-1
- A-2
13: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Leak tested
- Insulated
- Pressurized
14: A movie theater would be considered a
- public assembly occupancy
- mixed occupancy
- institutional occupancy
- commercial occupancy
15: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- on a conspicuous card located near the evaporator
16: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
17: What refrigerant doesn't have to be classified?
- R-134A
- R-422A
- R-717
- R-718
18: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
19: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Classifed
- Certified
20: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- the mechanical room housing the refrigeration system
- the outdoors
- Machinery rooms need not be vented
21: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
22: Indirect systems using Group II refrigerants
- 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
- shall be used for mechanical equipment only
23: 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
24: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
25: Ammonia belongs to Group
- A-1
- A-2
- B-1
- B-2