Topics: ASHRAE/CMR
1: Stop valves shall not be permitted between the system and the
- relief valve
- service valve
- condenser
- bleed valve
2: Liquid level gauges must be provided with what?
- A low level mark
- A relief valve
- Automatic shut-offs
- A red line
3: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
4: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
5: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 72"
- 7.25'
- 6'
6: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%
7: A declaration test is needed when the system contains more than
- 55 lbs
- 65 lbs
- 120 lbs
- 110 lbs
8: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
9: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Copper
- Aluminum
10: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
11: When should a relief valve start to function?
- Before the purge station discharges
- 10 psi before it's set pressure
- At it's set pressure
- Two times it's working pressure
12: Which refrigerant class listed below is the most flammable?
- B2
- A3
- A2
- C3
13: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
14: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 18
- 50
- 33
15: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
16: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Not required
- Annually and when installed
17: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
18: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100,000
- 10,000
- 1,000
- 100
19: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
20: How many refrigerant classifications are there for flammability?
- 1
- 3
- 2
- 7
21: Ammonia belongs to Group
- A-1
- A-2
- B-1
- B-2
22: The Department that certifies the transportation of refrigerant is the
- DOT
- EPA
- EPO
- RSES
23: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
24: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 800F
- 600F
- 700F
25: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above