Topics: ASHRAE/CMR
1: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- there is no Group B1 refrigerants
- lower
- higher
2: A class A3 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
- toxic and non-flammable
3: A High-Probablity system
- 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 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 a leak of refrigerant from failed connections will enter the unoccupied space
4: What refrigerant is an inorganic compound?
- R-132A
- R-22
- R-410A
- Ammonia
5: 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
6: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 12"
- 24"
- 18"
7: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
8: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 66
- 25
- 50
- 22
9: What would be the classification for Stop & Shop grocery store?
- Place of assembly
- Large mercantile
- Industrial
- Instituional
10: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- Lithium bromide
- ammonia
- CFC-11
- HCFC-123
11: What type of pressure relief device is used on a CO2 system?
- Fusible plug
- Gate valve
- Glove valve
- Rupture disk
12: Can ammonia be used on domestic system?
- yes, for systems under 10 tons
- no, unless there is proper ventilation system installed
- yes
- no
13: Direct systems using Group II refrigerants
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
- shall be installed per instruction of the AHJ
- shall not be used for air condition for human comfort
14: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 9.00'
- 8'4"
- 7.25'
- 7.00'
15: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- high side of the system
- the vapor side of the system
- low side of the system
- the liquid side of the system
16: What does safe access mean?
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
- Locked doors
- OSHA approved
17: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- it shall not be operated below prescribed pressuers
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
18: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Copper
- Zinc
- Nickel
- Magnesium
19: 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
20: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial
21: How many flammability classifications are refrigerants in?
- 5
- 2
- 3
- 7
22: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 33
- 50
- 18
- 22
23: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
24: R-11 belongs to Group
- A-2
- B-3
- B-1
- A-1
25: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 25'
- 15'
- 20'