Topics: ASHRAE/CMR
1: 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
2: Relief valves are rated in
- gallons of water per hour
- gallons of water per minute
- pounds of air per minute
- pounds of air per hour
3: 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
4: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 5
- 3
- 1
- 2
5: 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
6: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- explosion precautions must be taken
- the owner shall be informed
- no flames shall be permitted
7: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- high limit control
- zone valve
8: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- Copper
- PVC
9: What is R-611’s ASHRAE Safety Code?
- B2
- B3
- C3
- A2
10: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
11: 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 reciever
- between the compressor and oil separator
12: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak form a failed connection or component of such system
13: 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
14: What is R-22?
- HFC
- Chlorofluoromethane
- CCFCM
- Chlorodifluoromethane
15: Liquid level gauges must be provided with what?
- A low level mark
- A relief valve
- Automatic shut-offs
- A red line
16: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
17: Which refrigerant class listed below is the most flammable?
- B-2
- C-3
- A-3
- A-1
18: Who approves containers for refrigerants?
- D.O.E
- E.P.A
- D.O.T
- D.O.D
19: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 5 CFM
- 20 CFM
- 15 CFM
20: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- black iron
- copper
- magnesium
21: Pipe identification labels are required when the system contains more than
- 65 lbs
- 110 lbs
- 55 lbs
- 120 lbs
22: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
23: Stop valves shall not be permitted between the system and the
- relief valve
- condenser
- service valve
- bleed valve
24: How much clearance do you need around the perimeter of electrical panels?
- 18"
- 24"
- 12"
- 36"
25: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above