Topics: ASHRAE/CMR
1: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Locked doors
- Well-lit exit signs
- OSHA approved
2: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
3: Most CFC's are
- inert but toxic
- inert
- flammable
- toxic
4: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Aluminum
- Copper
- Magnesium alloy
5: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 20'
- 30'
- 15'
6: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Insulated and installed in a pipe duct (Encased)
- Classifed
- Leak checked
7: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
8: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 25
- 50
- 66
9: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- design pressure
- high pressure
- critical pressure
10: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- on a conspicuous card located near the evaporator
11: How many groups of refrigerants are there?
- 5
- 3
- 1
- 7
12: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or less
- 15 square feet or less
- 3 cubic feet or more
- 15 cubic feet or more
13: How many refrigerant classifications are there for flammability?
- 7
- 2
- 3
- 1
14: 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 100 persons congregate on levels above of 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
15: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- shall be authorized by a notarized insurance company
- 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
16: 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
- 75
- 15
17: What refrigerant were phased out in 2004?
- R-11
- R-12
- R-134a
- R-22
18: How many gallons of water do you need per pound of ammonia?
- 100
- 1
- 50
- 10
19: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
20: What refrigerant is an inorganic compound?
- R-22
- Ammonia
- R-132A
- R-410A
21: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
- Approved by the installing contractor
22: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
23: Class T machine room
- has no flame producing apparatus permanently installed
- shall include closets used for setting equipment
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
24: R-22 falls under which safety classification?
- A-2
- B-2
- A-1
- B-1
25: 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
- compressor
- boiler
- outside the machinery room
- evaporator