Topics: ASHRAE/CMR
1: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
2: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
3: Relief valves are rated in
- gallons of water per hour
- pounds of air per hour
- gallons of water per minute
- pounds of air per minute
4: All serviceable components of a refrigeration system shall be provided with
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- service manuals
- manufactures instructions on start-up procedures
5: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- ammonia
- Lithium bromide
- HCFC-123
6: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- the 1997 ANSI/ASHRAE Safety Code
- MSCA Code
- the MACS Pressure Vessel Code of Massachusetts
7: The discharge relief valve is located (9.4.6)
- between the compressor and oil separator
- between the compressor and the stop valve
- between the compressor and reciever
- on top of the condensor
8: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 18"
- 12"
- 36"
9: Each machinery room shall contain
- high and low pressure controls
- 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
10: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
11: How many different groups of refrigerants are there?
- 11
- 7
- 15
- 3
12: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use pressure relief devices
13: 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
14: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
15: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- redifential
- industrial
16: Class T machine room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 500 lbs
- 55 lbs
- 330 lbs
18: When should a relief valve start to function?
- At it's set pressure
- 10 psi before it's set pressure
- Two times it's working pressure
- Before the purge station discharges
19: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
20: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 20'
- At least 30'
- At least 40'
21: 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
22: 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
23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- fusion plug
- relief plug
- fusible plug
24: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
25: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-12
- R-113
- R-502