Topics: ASHRAE/CMR
1: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- public assembly occupancy.
- commercial occupancy
- mercantile occupancy
2: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the 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
3: Who authorizes the form of certificate of completion of refrigeration systems that should be used?
- Supervisor or project manager in charge of the installation
- Fire Marshal
- Massachusetts Board of Boiler Rules
- Owner
4: Most CFC's are
- inert
- toxic
- inert but toxic
- flammable
5: R-22 is considered a(n)
- HCFCH
- HFC
- CFC
- HCFC
6: 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
7: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
8: 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
9: A class A3 refrigerant is considered
- non-toxic and non-flammable
- toxic and non-flammable
- non-toxic but highly flammable
- toxic and somewhat flammable
10: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type N
- Type K
11: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
12: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
13: A hotel is considered a _______ occupancy.
- commercial
- institutional
- residential
- mercantile
14: What is R-22?
- HFC
- Chlorofluoromethane
- CCFCM
- Chlorodifluoromethane
15: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- industrial
- redifential
16: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 2.2
- 1.2
- 1
- 1.5
17: 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
18: A restaurant is classified as a
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
- commercial occupancy
19: How many different groups of refrigerants are there?
- 3
- 15
- 7
- 11
20: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
21: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Stainless Steel
- Magnesium alloy
- Copper
22: R-717 is
- trichloromethane
- carbon dioxide
- water
- ammonia
23: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UL and UR
- UV or UR
24: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
25: 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.