Topics: ASHRAE/CMR
1: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
2: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
3: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When it's used as part of a supply or return air system
- When there are sprinklers above
- When there is a space 6' or more above it
4: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- welder qualified
- licensed technician
- licensed welder
- competent welder
5: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Make sure its compatible, notify owner, and notify AHJ.
- Nothing must be done
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
6: R-410A is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-1
- A-2
- B-2
7: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 22
- 25
- 50
8: What would be the classification of a prison?
- Institutional
- Place of assembly
- Large mercantile
- Industrial
9: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- lower
- higher
- the same
- there is no Group B1 refrigerants
10: Most CFC's are
- flammable
- toxic
- inert
- inert but toxic
11: Who authorizes changes to the safety codes?
- Board of Boilers
- Contractor who last serviced the system.
- Person who pulled the permit
- Person in charge of the facility
12: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
13: What pipe can not be used for refrigeration?
- K
- M
- L
- N
14: A movie theater would be considered a
- public assembly occupancy
- mixed occupancy
- commercial occupancy
- institutional occupancy
15: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 150
- 100
- 200
16: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- on top of the condensor
- between the compressor and oil separator
- between the compressor and the stop valve
17: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Fusible plug
- Glove valve
- Gate valve
18: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- shall not be prohibited
19: A class B1 refrigerant is considered
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
20: 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
21: What is an example of institutional occupancy?
- Dorms
- Shopping mall
- Hospital
- Football stadium
22: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-123
- R-22
- R-12
23: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
24: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
25: How many different groups of refrigerants are there?
- 15
- 7
- 11
- 3