ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: Ammonia belongs to Group

  • A-1
  • B-2
  • B-1
  • A-2

3: Which refrigerant class listed below is the most flammable?

  • C3
  • B2
  • A3
  • A2

4: Which refrigerant replaced R-12?

  • R-410A
  • R-22
  • R-407A
  • R-134A

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

  • PVC
  • Aluminum
  • Stainless Steel
  • Copper

6: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

7: Pressure vessels with an internal volume of 3 cubic feet or less

  • do not need pressure relief protection
  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs

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

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

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

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

10: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

11: Doors communicating with outside from a mechanical room must be?

  • Self-closing, wooden, fire door
  • Self-closing, approved, fire door
  • Steel, approved, weather-stripped
  • Self-closing, aligned, fire door

12: A relief valve discharge capacity is rated in

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

13: 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

14: How far from the ground does a relief valve need to be?

  • At least 25' above grade
  • Not more than 3' above grade
  • At least 20' above grade
  • At least 15' above grade

15: When an inspection is needed, how often must it be done?

  • annually
  • every 18 months
  • every 36 months
  • every 24 months

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

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

17: A restaurant is classified as a

  • mixed occupancy
  • public assembly occupancy
  • large mercantile occupancy
  • commercial occupancy

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

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

19: How much refrigerant can be stored in a mechanical room outside of the system?

  • 330
  • 150
  • 100
  • 200

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

  • 6.6
  • 330
  • 110
  • 1,000

21: Refrigerants shall be classified by

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

22: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Gate valve
  • Glove valve
  • Rupture disk

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

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

24: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • high pressure
  • low pressure
  • design pressure
  • critical pressure

25: 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.

  • 15
  • 10
  • 25
  • 20