Topics: ASHRAE/CMR
1: NH3 is
- lithium bromide
- R-508A
- ammonia
- R-718
2: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- public assembly occupancy
- institutional occupancy
- mixed occupancy
- commercial occupancy
3: 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
4: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
5: Single compound Refrigerants are classified by what two criteria?
- Flammability and toxicity
- Flammability and temperature range
- Temperature range and hazardousness
- Weight and color
6: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
7: A class B2 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic and non-flammable
- non-toxic and highly flammable
8: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Nickel
- Magnesium
- Zinc
9: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Not required
- Annually and when installed
10: A class B1 refrigerant is considered
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
11: A relief valve discharge capacity is rated in
- PSIG
- PSIA
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
12: What type of copper is not permitted on refrigeration systems?
- Type M
- Type N
- Type L
- Type K
13: How many flammability classifications are refrigerants in?
- 7
- 2
- 3
- 5
14: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- installed through a pipe casing
- moisture barrier
- leak checked
15: What would be the classification of a church?
- Industrial
- Place of assembly
- Institutional
- Large mercantile
16: 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
17: How many refrigerant classifications are there for toxicity?
- 5
- 1
- 2
- 3
18: What must be done to refrigerant pipes before being buried?
- Encased
- Certified
- Coated
- Leaked checked
19: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 25
- 15
- 10
20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- place sign, check for leaks, insulate
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
21: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
22: A restaurant is classified as a
- large mercantile occupancy
- commercial occupancy
- mixed occupancy
- public assembly occupancy
23: 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
- boiler
- evaporator
- outside the machinery room
- compressor
24: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 72"
- 7.25'
- 6'
25: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Gate valve
- Rupture disk
- Fusible plug