Topics: ASHRAE/CMR
1: The color code of a tank of ammonia is
- lavender
- white
- silver
- light green
2: How many refrigerant classifications are there for toxicity?
- 1
- 3
- 5
- 2
3: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- fusion plug
- rupture plug
- relief plug
4: 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
5: The Department that certifies the transportation of refrigerant is the
- EPO
- DOT
- EPA
- RSES
6: What refrigerant is an inorganic compound?
- Ammonia
- R-22
- R-410A
- R-132A
7: NH3 is
- R-718
- R-508A
- lithium bromide
- ammonia
8: 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
- licensed welder
- licensed technician
- competent welder
- welder qualified
9: 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
10: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- critical pressure
- high pressure
- design pressure
11: Who approves containers for refrigerants?
- D.O.D
- D.O.T
- D.O.E
- E.P.A
12: When a refrigeration or air conditioning system is installed
- it shall not be operated below prescribed pressures
- it shall be approved by the owner for proper operation.
- the form of certificate shall be authorized by the Department of Pubic safety
- a field inspection shall be made before it is put into service
13: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
14: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
15: How many gallons of water per pound of ammonia do you need?
- 1
- 15
- 5
- 20
16: 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
17: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- business occupancy
- mercantile occupancy
- commercial occupancy
18: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- A-2
- B-1
- B-2
19: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
20: Indirect systems using Group II refrigerants
- shall be used for mechanical equipment only
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
21: Can ammonia be used on domestic system?
- yes
- no
- no, unless there is proper ventilation system installed
- yes, for systems under 10 tons
22: What is an egress?
- An escape route
- A code violation
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
23: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
24: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
25: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 15' above grade
- At least 25' above grade
- At least 20' above grade