Topics: ASHRAE/CMR
1: What type of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Stainless steel
- Magnesium alloy
2: Class T machine room
- shall include closets used for setting equipment
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
3: 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)
- public assembly occupancy
- institutional occupancy
- illegal occupancy
- commercial occupancy
4: What type of copper is not permitted on refrigeration systems?
- Type L
- Type M
- Type N
- Type K
5: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-134A
- R-11
6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
7: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or more
8: 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
- breaker panel in
- first disconnect in
- load-side of the contactor in
9: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
10: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
11: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 48
- 18
- 36
12: 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
13: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%
14: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- higher
- lower
- there is no Group B1 refrigerants
- the same
15: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Stop valve
- Muffler
- Moisture indicator
16: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
17: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Self-closing, wooden, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
18: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device installed on the high side of the system
- shall have a pressure limiting device and a pressure relief valve installed
19: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Relief valve
- Temperature limiter device
- Circuit Breaker
20: 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
- 350
- 50
- 550
21: Which refrigerant replaced R-12?
- R-134A
- R-22
- R-407A
- R-410A
22: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- zone valve
- high limit control
- low limit control
23: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When it's used as part of a supply or return air system
- When its white
- When there are sprinklers above
24: 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
25: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False