Topics: ASHRAE/CMR
1: What do you need to do when you install a new system?
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Have it inspected
2: How many groups of refrigerants are there?
- 5
- 3
- 1
- 7
3: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
4: 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
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
5: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-22
- R-12
- R-113
6: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
7: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Truck, office, every job, and on all equipment
- Trucks, invoices, and advertising
8: What must be done to refrigerant pipes before being buried?
- Coated
- Encased
- Certified
- Leaked checked
9: 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.
- 15
- 75
- 50
- 55
10: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
11: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the liquid side of the system
- the vapor side of the system
- low side of the system
- high side of the system
12: A professional or office building would be considered what type of occupancy?
- mercantile
- public assembly
- commercial
- business
13: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
14: 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.
- 100
- 550
- 50
- 350
15: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
16: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
17: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- lower
- there is no Group B1 refrigerants
- the same
18: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.5
- 1
- 2.2
- 1.2
19: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on the oil used
- Based on worst case fractionation
- Based on best case Fractionation
20: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Stainless steel
- Magnesium alloy
- Copper
21: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- commercial
- residential
22: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- PVC
- Copper
23: NH3 is
- lithium bromide
- R-718
- R-508A
- ammonia
24: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
25: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above