ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-113
  • R-12
  • R-11

2: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 75%
  • 90%
  • 80%
  • 100%

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

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

4: What is Trichlorotrifluoromethane?

  • R-113
  • R-13
  • R-11
  • R-12

5: What type refrigerant is NOT ozone depleting?

  • CFC
  • HFC
  • HCFC
  • Halon

6: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 30'
  • There is no minimum for relief valve and windows.
  • At least 40'
  • At least 20'

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

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

8: Machinery rooms must be vented to ______?

  • neutralizing tank
  • outdoors
  • basement
  • unoccupied spaces

9: Direct systems using Group II refrigerants

  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms
  • shall be allowed to be used for human comfort.

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

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

11: What must be done if refrigeration lines pass through a concrete floor?

  • insulated
  • installed through a pipe casing
  • moisture barrier
  • leak checked

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

  • Coated
  • Leaked checked
  • Certified
  • Encased

13: What is the refrigerant chlorodifluoromethane?

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

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

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

15: 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
  • 1,000
  • 100,000

16: 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

  • licensed welder
  • competent welder
  • welder qualified
  • licensed technician

17: What is a Category "M" fluid?

  • 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
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • 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

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

  • Copper
  • Magnesium alloy
  • Stainless steel
  • PVC

19: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 66
  • 50
  • 25

20: Class A refrigerants are considered

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

21: What type of relief valve is used on a CO2 system?

  • fusible plug
  • rupture disc
  • glove disc
  • gate valve

22: 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

23: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Muffler
  • Moisture indicator
  • Stop valve
  • Foot valve

24: Halogen refrigerants are corrosive to which type of metal?

  • black iron
  • magnesium
  • stainless steel
  • copper

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

  • 330
  • 150
  • 200
  • 100