ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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