ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: No open flames are allowed in the machinery room unless?

  • Only when combustion air is provided from outside of the machinery room
  • Never can be allowed
  • Approved by the authorized person
  • Approved by the installing contractor

2: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 10,000
  • 100,000
  • 1,000
  • 100

3: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection as well as a temperature protection device
  • over pressure protection
  • over pressure protection and a rupture disc
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months

4: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

5: R-11 belongs to Group

  • B-3
  • B-1
  • A-2
  • A-1

6: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 660 lbs
  • 330 lbs.
  • 550 lbs

7: A pressure relief should be located at least _______ from windows and doors.

  • 20'
  • 30'
  • 25'
  • 15'

8: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

9: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • does not require a pressure-limiting device
  • shall have a pressure limiting device installed on the high side of the system
  • shall be inspected by the Boiler of Inspectors bi-annually
  • shall have a pressure limiting device and a pressure relief valve installed

10: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper tubing
  • Brass
  • Copper

11: The Board of Boilers adopts by reference

  • MSCA Code
  • the MACS Pressure Vessel Code of Massachusetts
  • Montreal Protocol Safety Code
  • the 1997 ANSI/ASHRAE Safety Code

12: What must be done to refrigerant pipes before being buried?

  • Encased
  • Certified
  • Leaked checked
  • Coated

13: 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

14: Ammonia is under what safety classification?

  • B3
  • A3
  • B2
  • B1

15: What would be the classification of a church?

  • Large mercantile
  • Industrial
  • Place of assembly
  • Institutional

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

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

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

  • 80%
  • 99%
  • 75%
  • 90%

18: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with ammonia
  • Flush with R-718
  • Flush with RX-11
  • Flush with R-11

19: 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

20: Which occupancy can ammonia be used in?

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

21: NH3 is

  • lithium bromide
  • R-718
  • ammonia
  • R-508A

22: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class M machinery room
  • Class T machinery room
  • Class A machinery room
  • Class B machinery room

23: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

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

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

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

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