ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • 18
  • 36
  • 24
  • 48

2: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

3: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

4: What type refrigerant is NOT ozone depleting?

  • HCFC
  • CFC
  • HFC
  • Halon

5: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

6: When must refrigeration system covered by the code be inspected?

  • Annually
  • Annually and when installed
  • Not required
  • Upon installation

7: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Leak checked
  • Classifed
  • Insulated and installed in a pipe duct (Encased)
  • Certified

8: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

9: Refrigerants shall be classified by

  • color codes
  • requirements for commercial, industrial, and residential occupancies
  • maximum permissible quantities of each group
  • toxicity and flammability

10: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • T&P device
  • Circuit Breaker
  • Temperature limiter device
  • Relief valve

11: Halogenated refrigerants cannot be used with what material?

  • Aluminum
  • Copper
  • Stainless steel
  • Magnesium alloy

12: What refrigerant were phased out in 2004?

  • R-134a
  • R-12
  • R-22
  • R-11

13: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 110
  • 1,000
  • 330
  • 6.6

14: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UM” and “UV”
  • “UV”
  • “UL”
  • “U” or “UM”

15: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • welder qualified
  • licensed technician
  • competent welder
  • licensed welder

16: What type of relief valve is used on a CO2 system?

  • fusible plug
  • gate valve
  • glove disc
  • rupture disc

17: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 700F
  • 800F
  • 600F
  • 1000F

18: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Magnesium
  • Copper
  • Nickel
  • Zinc

19: 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

20: How are refrigerant blends classified?

  • Based on the oil used
  • Based on worst case fractionation
  • Based on best case Fractionation
  • Blends don't have to be classified

21: What section of ASHRAE-15 governs pressure vessels?

  • Section 9 ASHRAE-15 ASME VIII unfired
  • OSHA
  • Section 6 ASHRAE-34 ASME VIII unfired
  • Section 7 ASHRAE-15 ASME VIII fired

22: What is R-22?

  • CCFCM
  • Chlorofluoromethane
  • HFC
  • Chlorodifluoromethane

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

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

24: Name a CFC refrigerant(s):

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

25: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • is a reciprocating type compressor with 2 or more pistons
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber