Topics: ASHRAE/CMR
1: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
2: How many flammability classifications are refrigerants in?
- 5
- 3
- 7
- 2
3: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 25
- 22
- 66
- 50
4: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.T
- D.O.D
5: R-22 is considered a(n)
- HCFCH
- CFC
- HFC
- HCFC
6: 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
7: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
8: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
9: How many refrigerant classifications are there for toxicity?
- 5
- 2
- 3
- 1
10: What refrigerant were phased out in 2004?
- R-134a
- R-12
- R-22
- R-11
11: The Department that certifies the transportation of refrigerant is the
- RSES
- EPO
- EPA
- DOT
12: Each machinery room shall contain
- a refrigerant detector located in an area where the refrigerant 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 toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
13: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
14: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- the liquid side of the system
- high side of the system
- the vapor side of the system
15: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
16: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- commercial occupancy
- public assembly occupancy.
- mercantile occupancy
- business occupancy
17: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
18: Indirect systems using Group II refrigerants
- shall be used in refrigeration system less than 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used for mechanical equipment only
19: What is the refrigerant chlorodifluoromethane?
- R-22
- R-134a
- R-123
- R-12
20: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
21: What is a Category "D" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
22: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
- the outdoors
23: Machinery rooms must be vented to ______?
- basement
- outdoors
- neutralizing tank
- unoccupied spaces
24: Stop valves shall not be permitted between the system and the
- condenser
- relief valve
- bleed valve
- service valve
25: What does safe access mean?
- Locked doors
- A clear unobstructed path to the equipment and controls
- Well-lit exit signs
- OSHA approved