ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

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

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

3: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 1,000
  • 6.6
  • 110
  • 330

4: Stop valves shall not be permitted between the system and the

  • relief valve
  • service valve
  • bleed valve
  • condenser

5: 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

6: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

7: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

8: 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

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

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

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

  • RSES
  • DOT
  • EPA
  • EPO

11: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

12: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 9.00'
  • 7.25'
  • 7.00'
  • 8'4"

13: Ammonia belongs to Group

  • A-1
  • B-2
  • B-1
  • A-2

14: Can you use Ammonia in industrial applications?

  • No, never
  • When mixed with R-718
  • Yes, always
  • Yes, Under certain condidtions

15: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Classifed
  • Leak checked
  • Insulated and installed in a pipe duct (Encased)
  • Certified

16: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

17: 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.

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

18: 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

19: What is a Category "M" fluid?

  • A typical refrigerant used on newer air conditioning and heat pump systems
  • 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
  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content

20: Joints in refrigeration piping must be _____ before being covered?

  • Insulated
  • Leak tested
  • Inspected
  • Pressurized

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

  • Foot valve
  • Muffler
  • Stop valve
  • Moisture indicator

22: Who authorizes changes to the safety codes?

  • Contractor who last serviced the system.
  • Person in charge of the facility
  • Board of Boilers
  • Person who pulled the permit

23: What is Trichlorotrifluoromethane?

  • R-11
  • R-13
  • R-12
  • R-113

24: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

25: 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.