Topics: ASHRAE/CMR
1: Single compound Refrigerants are classified by what two criteria?
- Flammability and toxicity
- Temperature range and hazardousness
- Weight and color
- Flammability and temperature range
2: Class A refrigerants are considered
- non-toxic
- toxic
- flammable
- non-flammable
3: What would be the classification for Stop & Shop grocery store?
- Industrial
- Place of assembly
- Instituional
- Large mercantile
4: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class T machinery room
- Class B machinery room
- Class M machinery room
5: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
6: 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
- 550
- 350
- 50
7: R-22 is considered a(n)
- HFC
- HCFCH
- CFC
- HCFC
8: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- design pressure
- critical pressure
- low pressure
- high pressure
9: How much clearance do you need around the perimeter of electrical panels?
- 18"
- 24"
- 12"
- 36"
10: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Stainless Steel
- Aluminum
- Copper
11: 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
12: Pressure relief valves shall be marked with the data from
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
13: 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 have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used for mechanical equipment only
14: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-22
- R-11
- R-12
- R-113
15: 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.
16: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment
- Uniforms, checks, and invoices.
17: Stop valves shall not be permitted between the system and the
- relief valve
- bleed valve
- condenser
- service valve
18: 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
19: 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
20: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
21: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
22: A restaurant is classified as a
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
23: What would be the classification of a church?
- Industrial
- Large mercantile
- Institutional
- Place of assembly
24: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
25: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%