Topics: ASHRAE/CMR
1: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be authorized by a notarized insurance company
- shall be posted on the compressor shell or electrical panel at the unit
2: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and oil separator
- between the compressor and reciever
3: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 100,000
- 10,000
- 100
4: Who is permitted to access a refrigeration machine room?
- Contractors only
- Any employee
- Anyone, it's a completely safe area
- Authorized persons only
5: Ammonia can come in contact with _______ ?
- Copper tubing
- Brass
- Copper
- Aluminum
6: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Zinc
- Magnesium
- Nickel
7: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 3.0
- 2.0
- 5.5
- 2.5
8: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Copper
- Stainless Steel
- Aluminum
9: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
10: How many flammability classifications are refrigerants in?
- 3
- 5
- 7
- 2
11: 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
12: What type refrigerant is NOT ozone depleting?
- HCFC
- HFC
- Halon
- CFC
13: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
14: When air is ducted through a machine room that services occupied space, What must be done?
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
- Insulated and cross broke
15: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-502
- R-12
- R-11
16: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 75%
- 100%
- 90%
17: What is Trichlorotrifluoromethane?
- R-11
- R-113
- R-13
- R-12
18: Which refrigerant class listed below is the most flammable?
- C-3
- B-2
- A-1
- A-3
19: Class A refrigerants are considered
- non-toxic
- toxic
- flammable
- non-flammable
20: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 1000F
- 600F
- 700F
21: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 75%
- 100%
- 90%
- 80%
22: R-717 is
- ammonia
- trichloromethane
- water
- carbon dioxide
23: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall have a pressure limiting device installed on the high side of the system
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device and a pressure relief valve installed
24: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 48
- 24
- 18
25: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Stop valve
- Moisture indicator
- Muffler
- Foot valve