Topics: ASHRAE/CMR
1: R-22 falls under which safety classification?
- B-1
- B-2
- A-2
- A-1
2: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
3: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- CO Sensing
- phosgene gas sening
- A group sensing
- refrigerant sensing
4: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 12"
- 36"
- 18"
5: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-2
- B-1
- A-1
- A-2
6: How many gallons of water per pound of ammonia do you need?
- 1
- 5
- 20
- 15
7: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- outside the machinery room
- compressor
- evaporator
- boiler
8: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 55
- 50
- 75
9: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
10: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- low pressure
- high pressure
- design pressure
11: Name three things that must be done when changing refrigeration lubricant?
- Nothing must be done
- Place sign, check for leaks, insulate
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
12: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
13: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 14 days
- 30 days
- 1 week
- 2 months
14: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
15: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
16: How far from the ground does a relief valve need to be?
- At least 25' above grade
- At least 15' above grade
- Not more than 3' above grade
- At least 20' above grade
17: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
18: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-11
- R-22
- R-134A
19: Ammonia can come in contact with _______ ?
- Copper tubing
- Brass
- Copper
- Aluminum
20: R-717 is
- carbon dioxide
- water
- ammonia
- trichloromethane
21: Which refrigerant class listed below is the most flammable?
- A-3
- A-1
- C-3
- B-2
22: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
23: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Weight and color
- Flammability and toxicity
- Temperature range and hazardousness
24: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
25: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 75%
- 80%
- 90%