ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

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

  • PVC
  • Stainless steel
  • Magnesium alloy
  • Copper

4: 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

5: Direct systems using Group II refrigerants

  • shall be allowed to be used for human comfort.
  • 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

6: How many flammability classifications are refrigerants in?

  • 3
  • 7
  • 5
  • 2

7: What does safe access mean?

  • A clear unobstructed path to the equipment and controls
  • OSHA approved
  • Well-lit exit signs
  • Locked doors

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

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

9: 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
  • load-side of the contactor in
  • breaker panel in
  • first disconnect in

10: R-717 is

  • ammonia
  • trichloromethane
  • carbon dioxide
  • water

11: R-410A is classified as a ____ refrigerant on the safety matrix.

  • A-1
  • B-1
  • A-2
  • B-2

12: Where a refrigeration or air conditioning system is installed,

  • A field inspection shall be made before it is put into service
  • the form or certificate shall be authorized by the Department of Public Safety
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • it shall not be operated below prescribed pressuers

13: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 700F
  • 1000F
  • 600F
  • 800F

14: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

15: A restaurant is classified as a

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

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

  • you can't change refrigerants
  • nothing must be done
  • make sure it's compatible, notify owner, notify A.H.J
  • place sign, check for leaks, insulate

17: R-22 falls under which safety classification?

  • B-2
  • A-2
  • A-1
  • B-1

18: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 6.6 lbs
  • 22 lbs
  • 44 lbs
  • 13.9 lbs

19: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 2.5, 2.5
  • 6.6, 6.6
  • 2.5, 3.0
  • 3.0, 3.5

20: What refrigerant doesn't have to be classifted?

  • R-711
  • R-134a
  • R-718
  • R-717

21: Who authorizes the form of certificate of completion of refrigeration systems that should be used?

  • Massachusetts Board of Boiler Rules
  • Supervisor or project manager in charge of the installation
  • Owner
  • Fire Marshal

22: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

23: Refrigerant restricted in 2004 but used for transition for decades:

  • R-123
  • R-11
  • R-22
  • R-134A

24: Ammonia belongs to Group

  • A-2
  • B-2
  • B-1
  • A-1

25: 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