ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a pressure relief device
  • either a fusible plug or a pressure relief device
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • a fusible plug

2: Which occupancy can ammonia be used in?

  • commercial
  • industrial
  • depends on the quantity of freon
  • redifential

3: What type of material can't be used on the outlet of a relief valve?

  • Magnesium alloy
  • PVC
  • Stainless steel
  • Copper

4: 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
  • HCFC-123
  • CFC-11
  • ammonia

5: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

6: A declaration test is needed when the system contains more than

  • 110 lbs
  • 55 lbs
  • 120 lbs
  • 65 lbs

7: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 10
  • 25
  • 15
  • 20

8: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's water
  • Because it's cheap
  • Because it's a non-flammable refrigerant

9: What is an egress?

  • A valve put on the low side of the system to prevent frosting
  • An entrance or exit
  • A code violation
  • An escape route

10: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • shall have a pressure limiting device installed on the high side of the system
  • does not require a pressure-limiting device
  • shall have a pressure limiting device and a pressure relief valve installed
  • shall be inspected by the Boiler of Inspectors bi-annually

11: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

12: What would be the classification of a prison?

  • Large mercantile
  • Industrial
  • Institutional
  • Place of assembly

13: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • quarterly
  • bi-annually
  • annually
  • regularly

14: Can ammonia be used on domestic system?

  • yes, for systems under 10 tons
  • yes
  • no, unless there is proper ventilation system installed
  • no

15: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 48
  • 18
  • 36
  • 24

16: R-410A is classified as a ____ refrigerant on the safety matrix.

  • A-1
  • A-2
  • B-2
  • B-1

17: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 1
  • 5
  • 3
  • 2

18: Relief valves are rated in

  • gallons of water per minute
  • gallons of water per hour
  • pounds of air per hour
  • pounds of air per minute

19: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

20: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UM
  • UL and UR
  • UV or UR
  • UM or UL

21: What must be done to refrigerant pipes before being buried?

  • Leaked checked
  • Certified
  • Coated
  • Encased

22: Pipe identification labels are required when the system contains more than

  • 55 lbs
  • 120 lbs
  • 110 lbs
  • 65 lbs

23: What would be the classification of a church?

  • Institutional
  • Place of assembly
  • Large mercantile
  • Industrial

24: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

25: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • gas masks must be worn
  • the owner shall be informed
  • explosion precautions must be taken
  • no flames shall be permitted