ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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
  • 110
  • 80
  • 100

2: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

3: 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

4: 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
  • 15
  • 20
  • 25

5: R-717 is

  • carbon dioxide
  • ammonia
  • water
  • trichloromethane

6: 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
  • 100
  • 10,000

7: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the outdoors
  • the mechanical room housing the refrigeration system
  • the return air ducted system
  • Machinery rooms need not be vented

8: Fusible plugs shall not be used with pressure vessels of

  • 15 square feet or less
  • 3 cubic feet or more
  • 3 cubic feet or less
  • 15 cubic feet or more

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

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

10: The Department that certifies the transportation of refrigerant is the

  • RSES
  • EPO
  • EPA
  • DOT

11: 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.

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

12: What is R-290’s ASHRAE safety code?

  • A2
  • A3
  • B1
  • B2

13: What is the intention of the word “should” as used in the code?

  • A mandatory requirement
  • A recommendation or advisory guideline
  • A technician’s choice of how it should be done
  • None of the Above

14: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-12
  • R-113
  • R-11

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

  • 700F
  • 1000F
  • 600F
  • 800F

16: Ammonia (NH3) is a group III refrigerant

  • True
  • False

17: Where must a refrigeration contractor's license number be displayed?

  • Uniforms, checks, and invoices.
  • Trucks, license plates, and uniforms
  • Trucks, invoices, and advertising
  • Truck, office, every job, and on all equipment

18: The discharge relief valve is located (9.4.6)

  • between the compressor and the stop valve
  • on top of the condensor
  • between the compressor and reciever
  • between the compressor and oil separator

19: What must be done if refrigeration lines pass through a concrete floor?

  • leak checked
  • moisture barrier
  • installed through a pipe casing
  • insulated

20: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 1/8"
  • 1/16"
  • 3/32"

21: What is R-22?

  • Chlorodifluoromethane
  • HFC
  • CCFCM
  • Chlorofluoromethane

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

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

23: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

24: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.

25: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • higher
  • there is no Group B1 refrigerants
  • the same
  • lower