Topics: ASHRAE/CMR
1: Who is permitted to access a refrigeration machine room?
- Any employee
- Contractors only
- Anyone, it's a completely safe area
- Authorized persons only
2: 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
3: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
4: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
5: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
6: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Temperature limiter device
- Circuit Breaker
- Relief valve
- T&P device
7: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 18
- 24
- 15
- 10
8: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When it's used as part of a supply or return air system
- When there is a space 6' or more above it
- When its white
- When there are sprinklers above
9: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
10: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 3.0
- 5.5
- 2.5
11: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Fusible plug
- Glove valve
- Rupture disk
12: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- the same
- higher
- there is no Group B1 refrigerants
- lower
13: What would be the classification of a church?
- Large mercantile
- Place of assembly
- Industrial
- Institutional
14: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
15: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 25'
- 20'
- 30'
16: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
17: 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
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
18: Stop valves shall not be permitted between the system and the
- condenser
- service valve
- relief valve
- bleed valve
19: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
20: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- public assembly occupancy
- mixed occupancy
- institutional occupancy
- commercial occupancy
21: What is the refrigerant dichlorodifluoromethane?
- R-123
- R-12
- R-134A
- R-22
22: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
23: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 75%
- 90%
24: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
25: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- CO Sensing
- refrigerant sensing
- phosgene gas sening
- A group sensing