Topics: ASHRAE/CMR
1: Where must a refrigeration contractor's license number be displayed?
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
- Uniforms, checks, and invoices.
2: Fusible plugs shall not be used with pressure vessels of
- 15 square feet or less
- 3 cubic feet or more
- 3 cubic feet or less
- 15 cubic feet or more
3: Halogen refrigerants are corrosive to which type of metal?
- black iron
- copper
- stainless steel
- magnesium
4: A declaration test is needed when the system contains more than
- 55 lbs
- 120 lbs
- 65 lbs
- 110 lbs
5: Class 3 refrigerants are
- toxic
- highly flammable
- non-flammable
- non-toxic
6: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
7: 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
8: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 48
- 24
- 18
9: What type refrigerant is NOT ozone depleting?
- HCFC
- HFC
- Halon
- CFC
10: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 500 lbs
- 660 lbs
- 330 lbs
11: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-11
- R-113
- R-12
- R-22
12: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- a pressure relief device
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
13: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and oil separator
- between the compressor and reciever
14: What section of ASHRAE-15 governs pressure vessels?
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
15: Most CFC's are
- toxic
- inert
- inert but toxic
- flammable
16: Machinery rooms must be vented to ______?
- neutralizing tank
- basement
- outdoors
- unoccupied spaces
17: High pressure controls should be set no higher than
- 10% of set point
- 25% of set point
- 80% of set point
- 90% of set point
18: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
19: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
20: The Department that certifies the transportation of refrigerant is the
- DOT
- EPO
- RSES
- EPA
21: NH3 is
- R-508A
- lithium bromide
- R-718
- ammonia
22: 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
23: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 44 lbs
- 22 lbs
- 13.9 lbs
- 6.6 lbs
24: The Board of Boilers adopts by reference
- the 1997 ANSI/ASHRAE Safety Code
- Montreal Protocol Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- MSCA Code
25: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 330
- 110
- 1,000
- 6.6