Topics: ASHRAE/CMR
1: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- public assembly occupancy
- institutional occupancy
- commercial occupancy
- mixed occupancy
2: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- industrial
- redifential
3: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%
4: A hotel is considered a _______ occupancy.
- mercantile
- residential
- institutional
- commercial
5: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 5.5
- 2.0
- 3.0
6: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- load-side of the contactor in
- breaker panel in
- first disconnect in
- 24 volt secondary side of the Class 2 transformer to the thermostat
7: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100,000
- 100
- 1,000
- 10,000
8: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
9: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- shall be prohibited
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
10: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-11
- R-12
- R-113
11: A class A3 refrigerant is considered
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
12: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the authorized person
- Approved by the installing contractor
13: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.D
- D.O.T
14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 550 lbs
- 55 lbs
- 330 lbs.
15: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 33
- 18
- 22
16: 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
- outside the machinery room
- boiler
- evaporator
17: What is the refrigerant chlorodifluoromethane?
- R-123
- R-12
- R-134a
- R-22
18: Machinery rooms must be vented to ______?
- neutralizing tank
- unoccupied spaces
- outdoors
- basement
19: What refrigerant doesn't have to be classified?
- R-422A
- R-718
- R-134A
- R-717
20: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
21: How far from the ground does a relief valve need to be?
- At least 15' above grade
- Not more than 3' above grade
- At least 20' above grade
- At least 25' above grade
22: Halogen refrigerants are corrosive to which type of metal?
- black iron
- magnesium
- stainless steel
- copper
23: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
24: A movie theater would be considered a
- institutional occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
25: How many flammability classifications are refrigerants in?
- 5
- 3
- 7
- 2