Topics: ASHRAE/CMR
1: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
2: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
3: What is an egress?
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
- An escape route
- A code violation
4: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- breaker panel in
- load-side of the contactor in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
5: How many refrigerant classifications are there for toxicity?
- 5
- 3
- 1
- 2
6: Class 3 refrigerants are
- highly flammable
- toxic
- non-flammable
- non-toxic
7: When a refrigeration or air conditioning system is installed
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- a field inspection shall be made before it is put into service
- the form of certificate shall be authorized by the Department of Pubic safety
8: How many different groups of refrigerants are there?
- 15
- 3
- 7
- 11
9: Ammonia belongs to Group
- A-1
- B-1
- B-2
- A-2
10: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 100%
- 90%
- 75%
11: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
12: Joints in refrigeration piping must be _____ before being covered?
- Pressurized
- Inspected
- Leak tested
- Insulated
13: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 10,000
- 100,000
- 100
14: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's a non-flammable refrigerant
- Because it's cheap
- Because it's water
15: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- commercial occupancy
- public assembly occupancy.
- mercantile occupancy
- business occupancy
16: High pressure controls should be set no higher than
- 80% of set point
- 25% of set point
- 90% of set point
- 10% of set point
17: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
18: Most CFC's are
- flammable
- inert but toxic
- toxic
- inert
19: 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
20: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-1
- B-1
- A-2
21: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
22: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
23: What refrigerant is an inorganic compound?
- R-410A
- R-22
- Ammonia
- R-132A
24: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 3 cubic feet or more
- 15 square feet or less
- 15 cubic feet or more
25: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class B machinery room
- Class M machinery room
- Class A machinery room
- Class T machinery room