Topics: ASHRAE/CMR
1: What is R-22?
- Chlorodifluoromethane
- CCFCM
- Chlorofluoromethane
- HFC
2: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- 6'
- 72"
- Ceiling height
3: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- inside the room, immediately adjacent to each door
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
4: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
5: What is a Category "M" fluid?
- A typical refrigerant used on newer air conditioning and heat pump systems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperatures over 366F
6: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- phosgene gas sening
- A group sensing
- refrigerant sensing
- CO Sensing
7: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
8: A relief valve shall be located at least ___ above grade.
- 10'
- 25'
- 15'
- 36'
9: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
10: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Copper
- Zinc
- Nickel
11: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
12: Can ammonia be used on domestic system?
- yes
- no, unless there is proper ventilation system installed
- no
- yes, for systems under 10 tons
13: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
14: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- design pressure
- low pressure
- critical pressure
15: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
16: What is an example of institutional occupancy?
- Dorms
- Hospital
- Football stadium
- Shopping mall
17: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
18: Large mercantile occupancy is
- 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
- 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 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 or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
19: How many flammability classifications are refrigerants in?
- 7
- 2
- 5
- 3
20: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety
- it shall not be operated below prescribed pressuers
21: A movie theater would be considered a
- mixed occupancy
- commercial occupancy
- institutional occupancy
- public assembly occupancy
22: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the aggregate of the high side and low side
- the low side
- 2.5 times the design pressure
- the high side
23: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- explosion precautions must be taken
- no flames shall be permitted
- gas masks must be worn
- the owner shall be informed
24: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 550 lbs
- 330 lbs.
- 55 lbs
25: Ammonia belongs to Group
- A-1
- B-1
- A-2
- B-2