ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • A-1
  • C-3
  • A-3
  • B-2

2: Relief valves are rated in

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

3: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

4: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 50
  • 75
  • 20
  • 15

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

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

6: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

7: R-123 belongs to Group

  • B-2
  • B-1
  • A-3
  • B-3

8: 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

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

  • DOT
  • EPA
  • EPO
  • RSES

10: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.0
  • 3.0
  • 2.5
  • 5.5

11: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a fusible plug
  • a pressure relief device
  • either a fusible plug or a pressure relief device
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified

12: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • fusion plug
  • fusible plug
  • rupture plug
  • relief plug

13: 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

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

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

15: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

16: What section governs pressure vessels?

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

17: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's cheap
  • Because it's water
  • Because it's a non-flammable refrigerant

18: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the vapor side of the system
  • low side of the system
  • the liquid side of the system
  • high side of the system

19: Low temperature systems should have what?

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

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

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

21: How many refrigerant classifications are there for flammability?

  • 1
  • 3
  • 2
  • 7

22: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use rupture discs or duel pressure relief valves
  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs
  • shall use pressure relief devices

23: What refrigerant were phased out in 2004?

  • R-11
  • R-12
  • R-22
  • R-134a

24: 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.

25: What is the refrigerant chlorodifluoromethane?

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