Topics: ASHRAE/CMR
1: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 18
- 36
- 24
2: 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
3: 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
4: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 75%
- 80%
- 90%
5: How many gallons of water per pound of ammonia do you need?
- 5
- 20
- 1
- 15
6: Can ammonia be used on domestic system?
- no
- no, unless there is proper ventilation system installed
- yes, for systems under 10 tons
- yes
7: Setting a pressure relief device shall not exceed ___ of the design pressure
- 90%
- 80%
- 100%
- 75%
8: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- tight fitting doors
- self-closing doors
- automatic ventilation
9: Ammonia (NH3) is a group III refrigerant
- True
- False
10: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial
11: Who is permitted to access a refrigeration machine room?
- Any employee
- Contractors only
- Anyone, it's a completely safe area
- Authorized persons only
12: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- place sign, check for leaks, insulate
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
13: What refrigerant doesn't have to be classifted?
- R-134a
- R-718
- R-717
- R-711
14: 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
15: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
16: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-1
- B-2
- A-2
17: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
- the return air ducted system
- the outdoors
18: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- insulated
- moisture barrier
- installed through a pipe casing
19: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
20: Each machinery room shall contain
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
21: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- zone valve
- pressure relief device
- low limit control
22: What would be the classification of a prison?
- Institutional
- Place of assembly
- Large mercantile
- Industrial
23: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
24: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 14 days
- 1 week
- 2 months
25: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c