Topics: ASHRAE/CMR
1: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- public assembly occupancy.
- business occupancy
- commercial occupancy
2: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 72"
- 7.25'
- 6'
3: 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
4: Single compound Refrigerants are classified by what two criteria?
- Flammability and toxicity
- Flammability and temperature range
- Temperature range and hazardousness
- Weight and color
5: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Zinc
- Aluminum
- Copper
6: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 18
- 50
- 33
7: Class A refrigerants are considered
- non-flammable
- toxic
- flammable
- non-toxic
8: Indirect systems using Group II refrigerants
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
9: What is not a requirement of a Class T machine room?
- Fire hose connected to the building fire protection system.
- Tight fitting doors
- Automatic ventilation
- Self-closing doors
10: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
11: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 800F
- 600F
- 700F
12: Relief valves are rated in
- gallons of water per hour
- pounds of air per hour
- pounds of air per minute
- gallons of water per minute
13: How many groups of refrigerants are there?
- 3
- 1
- 7
- 5
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: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-113
- R-12
- R-11
16: 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.
17: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted on the compressor shell or electrical panel at the unit
18: How many gallons of water do you need per pound of ammonia?
- 1
- 50
- 10
- 100
19: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
20: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
21: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 25'
- 15'
22: Name three things that must be done when changing refrigeration lubricant?
- Make sure it's compatible, notify owner, notify AHJ
- Place sign, check for leaks, insulate
- Nothing must be done
- You can't change lubricants.
23: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 350
- 50
- 550
24: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Copper
- Aluminum
25: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UV or UR
- UL and UR
- UL and UM