ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Automatic ventilation
  • Self-closing doors
  • Tight fitting doors

2: NH3 is

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

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

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

4: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • of Group B2 refrigerant shall be prohibited
  • shall not be prohibited
  • shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited

5: 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.

6: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • CO Sensing
  • A group sensing
  • phosgene gas sening
  • refrigerant sensing

7: Relief valves are rated in

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

8: What is the refrigerant chlorodifluoromethane?

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

9: 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

10: A relief valve shall be located at least ___ above grade.

  • 36'
  • 25'
  • 15'
  • 10'

11: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

12: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and the stop valve
  • between the compressor and reciever
  • between the compressor and oil separator

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

  • C3
  • B2
  • A2
  • A3

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

  • 22
  • 66
  • 50
  • 25

15: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 50
  • 18
  • 33
  • 22

16: What is the refrigerant dichlorodifluoromethane?

  • R-22
  • R-12
  • R-134A
  • R-123

17: Which refrigerant replaced R-12?

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

18: Trichlorofluoromethane is the name of what refrigerant?

  • R-502
  • R-12
  • R-11
  • R-113

19: 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.

20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Nothing must be done
  • Place sign, check for leaks, and insulate suction line
  • Make sure its compatible, notify owner, and notify AHJ.
  • you can never change refrigerants

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

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

22: 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 RX-11
  • Flush with R-718
  • Flush with R-11

23: What refrigerant doesn't have to be classified?

  • R-718
  • R-422A
  • R-717
  • R-134A

24: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • breaker panel in
  • load-side of the contactor in

25: The color code of a tank of ammonia is

  • silver
  • light green
  • white
  • lavender