Topics: ASHRAE/CMR
1: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
2: R-11 belongs to Group
- B-3
- A-1
- B-1
- A-2
3: All serviceable components of a refrigeration system shall be provided with
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- service manuals
- manufactures instructions on start-up procedures
- safe access
4: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- black iron
- magnesium
- copper
5: A declaration test is needed when the system contains more than
- 55 lbs
- 110 lbs
- 120 lbs
- 65 lbs
6: How many CFMs are required per square foot of commercial office occupied space
- 5 CFM
- 20 CFM
- 15 CFM
- .5 CFM
7: 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 less than 1,000 lbs
- shall be used in refrigeration system in excess of 1,000 lbs
8: Halogenated refrigerants cannot be used with what material?
- Aluminum
- Stainless steel
- Magnesium alloy
- Copper
9: How many flammability classifications are refrigerants in?
- 2
- 5
- 3
- 7
10: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- commercial occupancy
- mixed occupancy
- public assembly occupancy
11: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
12: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- public assembly occupancy.
- commercial occupancy
- mercantile occupancy
13: 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
14: 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
15: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
16: Class A refrigerants are considered
- non-flammable
- flammable
- toxic
- non-toxic
17: When an inspection is needed, how often must it be done?
- annually
- every 36 months
- every 18 months
- every 24 months
18: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Certified
- Classifed
19: R-717 is
- water
- ammonia
- trichloromethane
- carbon dioxide
20: Pressure vessels having an inside diameter of 6” or less shall be protected by
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
- either a fusible plug or a pressure relief device
- a fusible plug
21: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
22: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with RX-11
- Flush with R-718
- Flush with R-11
- Flush with ammonia
23: When must refrigeration system covered by the code be inspected?
- Not required
- Annually
- Upon installation
- Annually and when installed
24: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Aluminum
- Copper
- Magnesium alloy
25: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 18
- 48
- 36