Topics: ASHRAE/CMR
1: How many groups of refrigerants are there?
- 7
- 3
- 5
- 1
2: 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
- 24 volt secondary side of the Class 2 transformer to the thermostat
- load-side of the contactor in
- breaker panel in
- first disconnect in
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Make sure its compatible, notify owner, and notify AHJ.
- Place sign, check for leaks, and insulate suction line
- Nothing must be done
4: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 40'
- There is no minimum for relief valve and windows.
- At least 30'
- At least 20'
5: 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
- evaporator
- boiler
- outside the machinery room
6: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 50
- 350
- 100
7: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Aluminum
- Copper
- Stainless steel
8: What refrigerant were phased out in 2004?
- R-11
- R-12
- R-22
- R-134a
9: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
- 15 cubic feet or more
10: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
11: How far from the ground does a relief valve need to be?
- At least 15' above grade
- At least 25' above grade
- At least 20' above grade
- Not more than 3' above grade
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: Stop valves shall not be permitted between the system and the
- bleed valve
- relief valve
- service valve
- condenser
14: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
15: Which refrigerant class listed below is the most flammable?
- A3
- A2
- B2
- C3
16: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and temperature range
- Flammability and toxicity
- Weight and color
17: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
18: A relief valve shall be located at least ___ above grade.
- 15'
- 36'
- 10'
- 25'
19: Relief valves are rated in
- gallons of water per hour
- gallons of water per minute
- pounds of air per minute
- pounds of air per hour
20: What is Trichlorotrifluoromethane?
- R-12
- R-11
- R-113
- R-13
21: Each machinery room shall contain
- high and low pressure controls
- 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
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
22: A restaurant is classified as a
- mixed occupancy
- public assembly occupancy
- large mercantile occupancy
- commercial occupancy
23: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use fusible plugs
24: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
25: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- illegal occupancy
- commercial occupancy
- public assembly occupancy
- institutional occupancy