Topics: ASHRAE/CMR
1: What is R-22?
- Chlorofluoromethane
- CCFCM
- Chlorodifluoromethane
- HFC
2: What is not a requirement of a Class T machine room?
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Tight fitting doors
- Automatic ventilation
3: 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
4: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
5: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 75
- 55
- 50
6: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-22
- R-12
- R-113
- R-11
7: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 20
- 1
8: Machinery rooms must be vented to ______?
- outdoors
- neutralizing tank
- basement
- unoccupied spaces
9: Class 3 refrigerants are
- highly flammable
- non-flammable
- non-toxic
- toxic
10: Which occupancy can ammonia be used in?
- redifential
- industrial
- depends on the quantity of freon
- commercial
11: A relief valve shall be located at least ___ above grade.
- 36'
- 10'
- 25'
- 15'
12: Most CFC's are
- flammable
- toxic
- inert
- inert but toxic
13: The Department that certifies the transportation of refrigerant is the
- EPA
- DOT
- EPO
- RSES
14: How many refrigerant classifications are there for flammability?
- 1
- 2
- 3
- 7
15: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
16: What is an example of institutional occupancy?
- Dorms
- Shopping mall
- Hospital
- Football stadium
17: 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
18: What type of copper is not permitted on refrigeration systems?
- Type L
- Type N
- Type K
- Type M
19: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 75%
- 80%
- 90%
- 99%
20: Pipe identification labels are required when the system contains more than
- 55 lbs
- 120 lbs
- 110 lbs
- 65 lbs
21: A Low-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- 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
22: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/8"
- 3/32"
- 1/16"
23: R-717 is
- trichloromethane
- carbon dioxide
- ammonia
- water
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: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 550 lbs
- 660 lbs
- 330 lbs.
- 55 lbs