Topics: ASHRAE/CMR
1: Ammonia is under what safety classification?
- B2
- B1
- A3
- B3
2: 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
3: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- leak checked
- installed through a pipe casing
- moisture barrier
4: What type of material can't be used on the outlet of a relief valve?
- PVC
- Magnesium alloy
- Stainless steel
- Copper
5: How much clearance do you need around the perimeter of electrical panels?
- 12"
- 36"
- 24"
- 18"
6: The Department that certifies the transportation of refrigerant is the
- EPO
- RSES
- EPA
- DOT
7: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 110
- 100
- 80
8: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 90%
- 75%
- 99%
- 80%
9: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
10: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- low pressure
- high pressure
- critical pressure
11: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
12: Pipe identification labels are required when the system contains more than
- 110 lbs
- 65 lbs
- 55 lbs
- 120 lbs
13: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 1
- 2
- 3
- 5
14: R-22 falls under which safety classification?
- B-1
- A-2
- A-1
- B-2
15: High pressure controls should be set no higher than
- 10% of set point
- 25% of set point
- 90% of set point
- 80% of set point
16: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
17: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
18: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Magnesium
- Nickel
- Zinc
19: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-11
- R-134A
20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- make sure it's compatible, notify owner, notify A.H.J
- you can't change refrigerants
- place sign, check for leaks, insulate
- nothing must be done
21: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 330 lbs
- 55 lbs
- 660 lbs
22: What is Trichlorotrifluoromethane?
- R-13
- R-113
- R-11
- R-12
23: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted on the compressor shell or electrical panel at the unit
- shall be posted and protected from dirt, water, and other elements
- shall be authorized by a notarized insurance company
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.
- CFC-11
- ammonia
- Lithium bromide
- HCFC-123
25: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 100
- 150
- 200