ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What type refrigerant is NOT ozone depleting?

  • HCFC
  • CFC
  • HFC
  • Halon

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

  • Coated
  • Leaked checked
  • Encased
  • Certified

3: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UM” and “UV”
  • “UV”
  • “UL”
  • “U” or “UM”

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

  • 700F
  • 800F
  • 600F
  • 1000F

5: How many gallons of water per pound of ammonia do you need?

  • 5
  • 20
  • 1
  • 15

6: How are refrigerant blends classified?

  • Based on the oil used
  • Based on worst case fractionation
  • Based on best case Fractionation
  • Blends don't have to be classified

7: Can ammonia be used on domestic system?

  • no, unless there is proper ventilation system installed
  • yes
  • no
  • yes, for systems under 10 tons

8: 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
  • 1,000
  • 100,000
  • 100

9: 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-11
  • Flush with R-718
  • Flush with RX-11

10: 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
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall be prohibited
  • shall not be prohibited

11: What section of ASHRAE-15 governs pressure vessels?

  • Section 9 ASHRAE-15 ASME VIII unfired
  • OSHA
  • Section 6 ASHRAE-34 ASME VIII unfired
  • Section 7 ASHRAE-15 ASME VIII fired

12: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

13: How many flammability classifications are refrigerants in?

  • 3
  • 7
  • 2
  • 5

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

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

15: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

16: Who approves containers for refrigerants?

  • D.O.D
  • E.P.A
  • D.O.E
  • D.O.T

17: An example of direct system is

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

18: A class A3 refrigerant is considered

  • toxic and somewhat flammable
  • non-toxic and non-flammable
  • non-toxic but highly flammable
  • toxic and non-flammable

19: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • gas masks must be worn
  • explosion precautions must be taken
  • no flames shall be permitted
  • the owner shall be informed

20: How far from the ground does a relief valve need to be?

  • At least 15' above grade
  • At least 25' above grade
  • At least 20' above grade
  • Not more than 3' above grade

21: 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
  • breaker panel in
  • first disconnect in
  • load-side of the contactor in

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

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

23: 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

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

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

25: A restaurant is classified as a

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