Topics: ASHRAE/CMR
1: 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
2: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Circuit Breaker
- Temperature limiter device
- Relief valve
3: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
4: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
5: Setting a pressure relief device shall not exceed ___ of the design pressure
- 90%
- 80%
- 100%
- 75%
6: What type refrigerant is NOT ozone depleting?
- HFC
- HCFC
- CFC
- Halon
7: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- the vapor side of the system
- the liquid side of the system
- low side of the system
8: A relief valve shall be located at least ___ above grade.
- 36'
- 10'
- 25'
- 15'
9: A Low-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
10: What refrigerant is an inorganic compound?
- Ammonia
- R-22
- R-410A
- R-132A
11: High pressure controls should be set no higher than
- 80% of set point
- 10% of set point
- 90% of set point
- 25% of set point
12: What is an example of institutional occupancy?
- Hospital
- Dorms
- Shopping mall
- Football stadium
13: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- high limit control
- zone valve
14: Can you use Ammonia in industrial applications?
- No, never
- Yes, always
- When mixed with R-718
- Yes, Under certain condidtions
15: What is an egress?
- An escape route
- A code violation
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
16: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 3
- 1
- 2
- 5
17: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- mixed occupancy
- institutional occupancy
- public assembly occupancy
- commercial occupancy
18: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
19: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
20: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
21: The discharge relief valve is located (9.4.6)
- between the compressor and oil separator
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and reciever
22: What would be the classification of a church?
- Place of assembly
- Industrial
- Large mercantile
- Institutional
23: Pipe identification labels are required when the system contains more than
- 55 lbs
- 120 lbs
- 110 lbs
- 65 lbs
24: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
25: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Fire hose connected to the building fire protection system.
- Tight fitting doors
- Self-closing doors