Topics: ASHRAE/CMR
1: Single compound Refrigerants are classified by what two criteria?
- Flammability and toxicity
- Weight and color
- Temperature range and hazardousness
- Flammability and temperature range
2: What section governs pressure vessels?
- Section ASHREA 34
- OSHA
- Section 8 ASHREA 15 ASME unfired
- Section 1 ASHREA 15 ASME fired
3: Class 3 refrigerants are
- toxic
- highly flammable
- non-toxic
- non-flammable
4: A hotel is considered a _______ occupancy.
- commercial
- residential
- institutional
- mercantile
5: Setting a pressure relief device shall not exceed ___ of the design pressure
- 100%
- 75%
- 80%
- 90%
6: Most CFC's are
- flammable
- inert
- inert but toxic
- toxic
7: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 80
- 100
- 110
8: Can ammonia be used on domestic system?
- yes
- no
- yes, for systems under 10 tons
- no, unless there is proper ventilation system installed
9: 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
10: A class A3 refrigerant is considered
- toxic and non-flammable
- non-toxic but highly flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
11: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- critical pressure
- design pressure
- low pressure
12: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 30 days
- 2 months
- 14 days
- 1 week
13: When an inspection is needed, how often must it be done?
- every 18 months
- annually
- every 24 months
- every 36 months
14: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- black iron
- magnesium
- copper
15: Can you use Ammonia in industrial applications?
- When mixed with R-718
- No, never
- Yes, always
- Yes, Under certain condidtions
16: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
17: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- place sign, check for leaks, insulate
- nothing must be done
- make sure it's compatible, notify owner, notify A.H.J
18: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- breaker panel in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- load-side of the contactor in
19: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- no flames shall be permitted
- the owner shall be informed
- explosion precautions must be taken
20: Class A refrigerants are considered
- non-flammable
- flammable
- toxic
- non-toxic
21: NH3 is
- ammonia
- lithium bromide
- R-508A
- R-718
22: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 36
- 24
- 18
23: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-2
- B-1
- A-1
24: 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
25: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area