Topics: ASHRAE/CMR
1: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
2: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
3: What would be the classification of a prison?
- Large mercantile
- Industrial
- Institutional
- Place of assembly
4: A movie theater would be considered a
- commercial occupancy
- public assembly occupancy
- mixed occupancy
- institutional occupancy
5: A declaration test is needed when the system contains more than
- 120 lbs
- 55 lbs
- 110 lbs
- 65 lbs
6: What is the refrigerant chlorodifluoromethane?
- R-12
- R-22
- R-123
- R-134a
7: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Person who pulled the permit
- Board of Boilers
- Contractor who last serviced the system.
8: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-502
- R-12
- R-11
9: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
10: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
11: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
12: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
13: All electrical work done on refrigeration systems must comply with
- ASHREA-15 Section 9.2.1
- Department of Energy
- OSHA
- NEC and Massachusetts Modifications
14: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the aggregate of the high side and low side
- 2.5 times the design pressure
- the high side
- the low side
15: How many gallons of water per pound of ammonia do you need?
- 5
- 20
- 15
- 1
16: The Department that certifies the transportation of refrigerant is the
- DOT
- RSES
- EPO
- EPA
17: Relief valves are rated in
- gallons of water per minute
- pounds of air per hour
- gallons of water per hour
- pounds of air per minute
18: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Zinc
- Nickel
- Magnesium
19: A relief valve shall be located at least ___ above grade.
- 10'
- 25'
- 15'
- 36'
20: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 18
- 33
- 50
21: When must refrigeration system covered by the code be inspected?
- Upon installation
- Not required
- Annually
- Annually and when installed
22: _____ and its alloys are suitable for use with ammonia systems.
- Aluminum
- Copper
- Magnesium
- Zinc
23: What must be done to refrigerant pipes before being buried?
- Coated
- Certified
- Encased
- Leaked checked
24: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- HCFC-123
- Lithium bromide
- CFC-11
- ammonia
25: Pipe identification labels are required when the system contains more than
- 110 lbs
- 120 lbs
- 55 lbs
- 65 lbs