Topics: ASHRAE/CMR
1: 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
2: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 550 lbs
- 660 lbs
- 55 lbs
- 330 lbs.
3: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with ammonia
- Flush with RX-11
- Flush with R-718
- Flush with R-11
4: 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.
- 55
- 50
- 15
- 75
5: Single compound Refrigerants are classified by what two criteria?
- Weight and color
- Temperature range and hazardousness
- Flammability and toxicity
- Flammability and temperature range
6: A professional or office building would be considered what type of occupancy?
- mercantile
- business
- public assembly
- commercial
7: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
8: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 10
- 24
- 18
9: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 48
- 18
- 24
10: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
11: 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
12: 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
13: What is R-611’s ASHRAE Safety Code?
- B2
- B3
- C3
- A2
14: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- high pressure
- critical pressure
- design pressure
15: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
16: What must be done to refrigerant pipes before being buried?
- Coated
- Certified
- Encased
- Leaked checked
17: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
18: Which refrigerant class listed below is the most flammable?
- B-2
- C-3
- A-3
- A-1
19: 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
20: What refrigerant is an inorganic compound?
- Ammonia
- R-22
- R-132A
- R-410A
21: NH3 is
- ammonia
- R-508A
- R-718
- lithium bromide
22: What refrigerant doesn't have to be classifted?
- R-718
- R-717
- R-711
- R-134a
23: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- quarterly
- annually
- bi-annually
- regularly
24: R-717 is
- trichloromethane
- carbon dioxide
- water
- ammonia
25: When a refrigerating machinery room is used, the emergency procedures shall be posted
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator