ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

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

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

3: Relief valves are rated in

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

4: A relief valve discharge capacity is rated in

  • PSIG
  • PSIA
  • temperature minus pounds of air per second divided by release rate squared
  • Pounds of air per minute.

5: 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.

  • 80
  • 110
  • 90
  • 100

6: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

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

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

8: 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

9: Class T machine room

  • shall have refrigerant leak detecting systems installed inside and outside the room
  • shall have remote controls to stop the action of the refrigerant compressor
  • has no flame producing apparatus permanently installed
  • shall include closets used for setting equipment

10: What is a Category "D" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F

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

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

12: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above

13: Class 3 refrigerants are

  • toxic
  • non-flammable
  • non-toxic
  • highly flammable

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

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

15: Can you use Ammonia in industrial applications?

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

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

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

17: Ammonia (NH3) is a group III refrigerant

  • True
  • False

18: What refrigerant doesn't have to be classifted?

  • R-134a
  • R-717
  • R-718
  • R-711

19: The color code of a tank of ammonia is

  • lavender
  • silver
  • white
  • light green

20: A movie theater would be considered a

  • institutional occupancy
  • mixed occupancy
  • public assembly occupancy
  • commercial occupancy

21: 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

22: What is a Category "M" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F

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

  • Magnesium
  • Zinc
  • Nickel
  • Copper

24: What is the refrigerant chlorodifluoromethane?

  • R-123
  • R-12
  • R-134a
  • R-22

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

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