Topics: ASHRAE/CMR
1: Class 3 refrigerants are
- non-toxic
- non-flammable
- highly flammable
- toxic
2: 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
3: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 15
- 50
- 75
4: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class M machinery room
- Class B machinery room
- Class T machinery room
5: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- fusible plug
- relief plug
- fusion plug
6: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 44 lbs
- 6.6 lbs
- 13.9 lbs
7: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-11
- R-134A
8: A professional or office building would be considered what type of occupancy?
- business
- mercantile
- public assembly
- commercial
9: Pressure vessels having an inside diameter of 6” or less shall be protected by
- either a fusible plug or a pressure relief device
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a pressure relief device
10: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
11: What section governs pressure vessels?
- Section 1 ASHREA 15 ASME fired
- OSHA
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
12: Where must a refrigeration contractor's license number be displayed?
- Truck, office, every job, and on all equipment
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
13: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Pressurized
- Insulated
- Inspected
14: What is not a requirement of a Class T machine room?
- Fire hose connected to the building fire protection system.
- Self-closing doors
- Tight fitting doors
- Automatic ventilation
15: Can you use Ammonia in industrial applications?
- Yes, always
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
16: All electrical work done on refrigeration systems must comply with
- ASHREA-15 Section 9.2.1
- NEC and Massachusetts Modifications
- OSHA
- Department of Energy
17: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 3/32"
- 1/16"
- 1/8"
18: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 1,000
- 100,000
- 10,000
- 100
19: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 350
- 100
- 250
- 400
20: What refrigerant doesn't have to be classified?
- R-422A
- R-717
- R-134A
- R-718
21: 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.
22: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Zinc
- Nickel
- Copper
- Magnesium
23: Can ammonia be used on domestic system?
- yes, for systems under 10 tons
- no, unless there is proper ventilation system installed
- no
- yes
24: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
25: A High-Probablity 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
- 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