Topics: ASHRAE/CMR
1: B3 refrigerants are considered
- non-toxic but non-flammable
- toxic but non-flammable
- toxic and highly flammable
- non-toxic but flammable
2: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 22
- 25
- 50
3: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Copper
- Stainless steel
- Magnesium alloy
4: 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
- boiler
- outside the machinery room
- compressor
- evaporator
5: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
6: R-22 is considered a(n)
- HFC
- HCFC
- HCFCH
- CFC
7: Class A refrigerants are considered
- flammable
- toxic
- non-toxic
- non-flammable
8: Relief valves are rated in
- pounds of air per hour
- pounds of air per minute
- gallons of water per minute
- gallons of water per hour
9: How many refrigerant classifications are there for flammability?
- 3
- 2
- 7
- 1
10: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
11: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
- Yes, always
12: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 25
- III
- 15
13: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Certified
- Leak checked
- Insulated and installed in a pipe duct (Encased)
14: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 100
- 150
- 200
15: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- business occupancy
- commercial occupancy
- mercantile occupancy
16: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Copper
- Aluminum
17: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 50
- 15
- 20
- 75
18: What is the refrigerant dichlorodifluoromethane?
- R-22
- R-134A
- R-123
- R-12
19: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 20'
- 30'
- 25'
20: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
21: What would be the classification of a prison?
- Place of assembly
- Institutional
- Industrial
- Large mercantile
22: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
23: A relief valve shall be located at least ___ above grade.
- 10'
- 15'
- 25'
- 36'
24: What do you need to do when you install a new system?
- Have it inspected
- Document the superheat and subcooling reading
- Insulate the suction line before you take a superheat reading
- Add refrigerant
25: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- high pressure
- low pressure
- critical pressure