Topics: ASHRAE/CMR
1: Ammonia (NH3) is a group III refrigerant
- True
- False
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: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
4: How many refrigerant classifications are there for toxicity?
- 1
- 2
- 5
- 3
5: Which refrigerant class listed below is the most flammable?
- C3
- A3
- B2
- A2
6: 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
- competent welder
- licensed technician
- licensed welder
- welder qualified
7: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
8: R-717 is
- water
- carbon dioxide
- trichloromethane
- ammonia
9: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- the vapor side of the system
- low side of the system
- the liquid side of the system
10: A class B1 refrigerant is considered
- toxic but non-flammable
- non-toxic but highly flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
11: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
12: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 75%
- 80%
- 90%
- 100%
13: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
14: When should a relief valve start to function?
- 10 psi before it's set pressure
- Two times it's working pressure
- At it's set pressure
- Before the purge station discharges
15: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Gate valve
- Fusible plug
- Rupture disk
16: What refrigerant is an inorganic compound?
- R-410A
- Ammonia
- R-132A
- R-22
17: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 22
- 50
- 33
18: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and toxicity
- Weight and color
- Flammability and temperature range
19: B3 refrigerants are considered
- non-toxic but flammable
- non-toxic but non-flammable
- toxic and highly flammable
- toxic but non-flammable
20: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-134a
- R-717
21: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 800F
- 1000F
- 700F
22: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Zinc
- Copper
- Nickel
- Magnesium
23: Class A refrigerants are considered
- flammable
- non-toxic
- non-flammable
- toxic
24: What type refrigerant is NOT ozone depleting?
- CFC
- HCFC
- HFC
- Halon
25: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 15
- 24
- 18