2A656 CDC Vol 5

21 Questions | Total Attempts: 419

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2A656 Quizzes & Trivia

Multiple Choice


Questions and Answers
  • 1. 
    (801) A gaseous nitrogen (N2) charge is added to a liquid fire extinguishing agent in order to
    • A. 

      Convert the liquid to a gas upon discharge.

    • B. 

      Expel the agent from the bottle.

    • C. 

      Assist in extinguishing the fire.

    • D. 

      Stabilize the temperature.

  • 2. 
    (801) In a liquid-agent fire extinguisher container, why is the frangible disc undercut into pie shaped sections?
    • A. 

      To break easily.

    • B. 

      To break cleanly into large pieces.

    • C. 

      To stop the pieces from clogging the strainer.

    • D. 

      To enable the pieces to pass easily through the strainer.

  • 3. 
    (802) The purpose of a time delay relay that is used on some liquid-agent fire extinguishing systems is to
    • A. 

      Position the valves.

    • B. 

      Select the fire bottle bank.

    • C. 

      Prime the explosive cartridge.

    • D. 

      Prevent discharging of the agent.

  • 4. 
    (802) BANK no. 2 in a two-shot liquid-agent fire extinguishing system failed to discharge, while BANK no. 1 discharged normally. The most probable cause of this malfunction is what type of faulty switch?
    • A. 

      Engine selector.

    • B. 

      Agent discharge.

    • C. 

      Time delay relay.

    • D. 

      Discharge selector.

  • 5. 
    (802) A flashing red light on the fire emergency control T-handle indicates
    • A. 

      An open fuel valve.

    • B. 

      Closed air valves.

    • C. 

      An overheat condition.

    • D. 

      A fire.

  • 6. 
    (802) When depressed, which switch on a T-handle fire extinguishing system completes the circuit to the squib?
    • A. 

      Time delay relay switch.

    • B. 

      Agent discharge switch.

    • C. 

      Engine selector switch.

    • D. 

      Bottle selector switch.

  • 7. 
    (802) In the T-handle fire extinguishing system, the two-way check valve is pushed into position by the
    • A. 

      Liquid agent.

    • B. 

      Discharge valve.

    • C. 

      Agent discharge switch.

    • D. 

      Gaseous nitrogen charge.

  • 8. 
    (803) How does a liquid coolant system keep electronic components cool?
    • A. 

      Cycles coolant through the electronic component.

    • B. 

      Cycles conditioned air through the electronic component.

    • C. 

      Directs coolant across the electronic component.

    • D. 

      Directs conditioned air across the electronic component.

  • 9. 
    (803) What characteristic of the fluid used in a liquid coolant system makes it suitable as a coolant for electronic components?
    • A. 

      Viscosity.

    • B. 

      Resistance.

    • C. 

      Metallic content.

    • D. 

      Nonconductance.

  • 10. 
    (803) During initial start of a liquid coolant system, the controller timer energizes the solenoid shutoff valve closed for three minutes. The purpose of this action is to
    • A. 

      Prevent pressure surges.

    • B. 

      Allow for rapid cool down.

    • C. 

      Allow for system stabilization.

    • D. 

      Provide rapid pressure buildup.

  • 11. 
    (803) What component of a liquid coolant system is positioned by the temperature of the coolant?
    • A. 

      Thermal pilot valve

    • B. 

      Thermal modulating valve

    • C. 

      Delta system bypass valve

    • D. 

      Over-pressure relief valve

  • 12. 
    (803) In a liquid coolant system, what tells you that the liquid coolant filter is dirty?
    • A. 

      The system shuts down

    • B. 

      A warning light flashes

    • C. 

      A warning horn alarm is activated.

    • D. 

      A mechanical pop-up indicator is activated

  • 13. 
    (803) What components control the temperature of the coolant in a liquid coolant system?
    • A. 

      Pump and heat exchanger

    • B. 

      Pump and thermal pilot valve

    • C. 

      Thermal modulating valve and heat exchanger

    • D. 

      Thermal modulating valve and thermal pilot valve

  • 14. 
    (804) When maintaining a liquid coolant system, over-torquing clamps may cause what to happen?
    • A. 

      Leakage of the component.

    • B. 

      Contamination of the component.

    • C. 

      Damage or failure of the component.

    • D. 

      Nothing happens.

  • 15. 
    (804) In a liquid coolant system, what is the purpose of purging the servicing unit supply hose?
    • A. 

      Remove air from the servicing cart

    • B. 

      Remove contaminants from the system

    • C. 

      Prevent air from entering the system

    • D. 

      Prevent moisture from entering the servicing cart

  • 16. 
    (805) Why are multiplace liferaft cylinders wire-wound and dip-soldered?
    • A. 

      Decreases metal fatigue

    • B. 

      Adds strength to the cylinder

    • C. 

      Decreases cylinder expansion

    • D. 

      Increases cylinder corrosion resistance

  • 17. 
    (805) To ensure that a multiplace liferaft will inflate in extremely low temperatures, the inflation cylinder has a charge of
    • A. 

      Air

    • B. 

      Nitrogen

    • C. 

      Hydrogen

    • D. 

      Carbon dioxide

  • 18. 
    (805) What component of a liferaft inflation cylinder assembly keeps carbon dioxide (CO2) within the cylinder and permits an unrestricted flow of CO2 to the liferaft?
    • A. 

      Diffuser plug

    • B. 

      Seating sleeve

    • C. 

      Cartridge filter

    • D. 

      Discharge valve

  • 19. 
    (805) Releasing carbon dioxide (CO2) from a liferaft cylinder into a liferaft is normally done by activating the
    • A. 

      Cam

    • B. 

      Rupture disc

    • C. 

      Locking sleeve

    • D. 

      Check valve seat

  • 20. 
    (806) How many pounds of carbon dioxide (CO2) does a fully charged shipping/storage cylinder contain?
    • A. 

      25

    • B. 

      50

    • C. 

      75

    • D. 

      100

  • 21. 
    (806) Liferaft inflation cylinders having an outside diameter of less than 2 inches and a length of less than 2 feet do not require
    • A. 

      Stenciling

    • B. 

      Recharging

    • C. 

      Hydrostatic testing

    • D. 

      Corrosion treatment

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