2A656 CDC Volume 5

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2A656 Quizzes & Trivia

Electrical/Environmental CDC 2A656 Volume 5


Questions and Answers
  • 1. 
    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. 
    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. 
    The purpose of a time delay relay that is used on some liquid-agent fire extinguishing systems is to
    • A. 

      Prevent discharging of the agent

    • B. 

      Position the valves

    • C. 

      Prime the explosive cartridge

    • D. 

      Select the fire bottle bank

  • 4. 
    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. 

      Time delay relay

    • B. 

      Engine selector

    • C. 

      Agent discharge

    • D. 

      Discharge selector

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

      An overheat condition

    • B. 

      An open fuel valve

    • C. 

      Closed air valves

    • D. 

      A fire

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

      Engine selector switch

    • B. 

      Bottle selector switch

    • C. 

      Agent discharge switch

    • D. 

      Time delay relay switch

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

      Gaseous nitrogen charge

    • B. 

      Agent discharge switch

    • C. 

      Discharge valve

    • D. 

      Liquid agent

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

      Cycles conditioned air through the electronic component

    • B. 

      Cycles coolant through the electronic component

    • C. 

      Directs coolant across the electronic component

    • D. 

      Directs conditioned air across the electronic component

  • 9. 
    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. 

      Nonconductance

    • D. 

      Metallic content

  • 10. 
    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 system stabiliztion

    • C. 

      Allow for rapid cool down

    • D. 

      Provide rapid pressure buildup

  • 11. 
    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. 
    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. 
    What components control the temperature of the coolant in a liquid coolant system?
    • A. 

      Thermal modulating valve and thermal pilot valve

    • B. 

      Thermal modulating valve and heat exchanger

    • C. 

      Pump and thermal pilot valve

    • D. 

      Pump and heat exchanger

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

      Leakage of the component

    • B. 

      Contamination of the component

    • C. 

      Nothing happens

    • D. 

      Damage or failure of the component

  • 15. 
    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. 
    Why are multiplace liferaft cylinders wire-wound and dip-soldered?
    • A. 

      Adds strength to the cylinder

    • B. 

      Decreases metal fatigue

    • C. 

      Decreases cylinder expansion

    • D. 

      INcreases cylinder corrosion reistance

  • 17. 
    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. 
    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. 
    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. 
    How many pounds of carbon dioxide (CO2) does a fully charged shipping/storage cylinder contain?
    • A. 

      25

    • B. 

      50

    • C. 

      75

    • D. 

      100

  • 21. 
    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

  • 22. 
    After recharging a liferaft inflation cylinder-but before returning it to a serviceable status-what do you do to the cylinder?
    • A. 

      Repaint, then reweigh after 24 hours

    • B. 

      Repaint, then reweight after 48 hours

    • C. 

      Test for leaks, then reweigh after 24 hours

    • D. 

      Test for leaks, then reweigh after 48 hours

  • 23. 
    What is added to multiplace liferaft cylinders to ensure proper discharge of the carbon dioxide (CO2)?
    • A. 

      Dry argon

    • B. 

      Dry nitrogen

    • C. 

      Liquid argon

    • D. 

      Liquid nitrogen

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