Topics: ASHRAE/CMR
1: A restaurant is classified as a
- mixed occupancy
- large mercantile occupancy
- commercial occupancy
- public assembly occupancy
2: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- explosion precautions must be taken
- no flames shall be permitted
- the owner shall be informed
3: What do you need to do when you install a new system?
- Insulate the suction line before you take a superheat reading
- Have it inspected
- Add refrigerant
- Document the superheat and subcooling reading
4: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-113
- R-22
- R-12
5: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 25
- 10
- 15
6: What refrigerant doesn't have to be classifted?
- R-711
- R-717
- R-718
- R-134a
7: Evaporators within 18" of a heating coil must be equipped with a
- zone valve
- low limit control
- pressure relief device
- high limit control
8: Ammonia (NH3) is a group III refrigerant
- True
- False
9: Fusible plugs shall not be used with pressure vessels of
- 15 square feet or less
- 3 cubic feet or less
- 15 cubic feet or more
- 3 cubic feet or more
10: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 700F
- 800F
- 600F
- 1000F
11: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
12: A class B2 refrigerant is considered
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic and highly flammable
13: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 3
- 5
- 1
- 2
14: What refrigerant were phased out in 2004?
- R-134a
- R-12
- R-22
- R-11
15: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-11
- R-134A
- R-123
16: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 660 lbs
- 500 lbs
- 330 lbs
18: Class T machine room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
19: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Copper
- Stainless steel
- Magnesium alloy
20: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- either a fusible plug or a pressure relief device
- a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
21: A declaration test is needed when the system contains more than
- 110 lbs
- 55 lbs
- 120 lbs
- 65 lbs
22: Can ammonia be used on domestic system?
- no, unless there is proper ventilation system installed
- yes
- no
- yes, for systems under 10 tons
23: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 18
- 10
- 24
24: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 3/32"
- 1/16"
- 1/8"
25: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- welder qualified
- licensed technician
- competent welder
- licensed welder