ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 90%
  • 80%
  • 75%
  • 99%

2: What is not a requirement of a class T machine room?

  • fire hose connection to the building fire protection system
  • self-closing doors
  • automatic ventilation
  • tight fitting doors

3: What section governs pressure vessels?

  • OSHA
  • Section ASHREA 34
  • Section 1 ASHREA 15 ASME fired
  • Section 8 ASHREA 15 ASME unfired

4: A class B1 refrigerant is considered

  • toxic and somewhat flammable
  • non-toxic and non-flammable
  • toxic but non-flammable
  • non-toxic but highly flammable

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

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

6: What would be the classification for Stop & Shop grocery store?

  • Place of assembly
  • Industrial
  • Large mercantile
  • Instituional

7: The color code of a tank of ammonia is

  • white
  • silver
  • lavender
  • light green

8: What is the minimum height refrigeration piping should be placed against walls?

  • 7.25'
  • Ceiling height
  • 6'
  • 72"

9: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited
  • of Group B2 refrigerant shall be prohibited
  • shall be prohibited

10: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • the low side
  • the aggregate of the high side and low side
  • 2.5 times the design pressure

11: Which occupancy can ammonia be used in?

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

12: What is the refrigerant dichlorodifluoromethane?

  • R-123
  • R-12
  • R-134A
  • R-22

13: What do you need to do when you install a new system?

  • Insulate the suction line before you take a superheat reading
  • Have it inspected
  • Add refrigerant
  • Document the superheat and subcooling reading

14: Ammonia (NH3) is a group III refrigerant

  • True
  • False

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

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

16: Refrigerants shall be classified by

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

17: 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
  • licensed welder
  • competent welder

18: 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 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.
  • 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

19: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When it's used as part of a supply or return air system
  • When its white
  • When there is a space 6' or more above it
  • When there are sprinklers above

20: Stop valves shall not be permitted between the system and the

  • relief valve
  • condenser
  • service valve
  • bleed valve

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

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

22: 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.

  • 25
  • 10
  • 15
  • 20

23: Who authorizes changes to the safety codes?

  • Person who pulled the permit
  • Contractor who last serviced the system.
  • Board of Boilers
  • Person in charge of the facility

24: 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

25: Can you use Ammonia in industrial applications?

  • Yes, Under certain condidtions
  • No, never
  • When mixed with R-718
  • Yes, always