Topics: ASHRAE/CMR
1: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- MSCA Code
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
2: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
3: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 100
- 80
- 90
- 110
4: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- Ceiling height
- 7.25'
- 6'
5: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
6: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- Machinery rooms need not be vented
- the outdoors
- the return air ducted system
7: Relief valves are rated in
- pounds of air per hour
- gallons of water per hour
- pounds of air per minute
- gallons of water per minute
8: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 15 CFM
- 5 CFM
- 20 CFM
9: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 330 lbs
- 500 lbs
- 55 lbs
10: What is a Category "M" fluid?
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- 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
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
11: Each machinery room shall contain
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- high and low pressure controls
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
12: B3 refrigerants are considered
- non-toxic but flammable
- non-toxic but non-flammable
- toxic and highly flammable
- toxic but non-flammable
13: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 2 months
- 1 week
- 14 days
14: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 1,000
- 110
- 330
15: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
16: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
17: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 22
- 66
- 25
18: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
19: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- commercial occupancy
- public assembly occupancy
- institutional occupancy
- mixed occupancy
20: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
21: 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
22: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- evaporator
- compressor
- boiler
- outside the machinery room
23: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
24: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- critical pressure
- high pressure
- low pressure
25: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above