Usaf 2F071 CDC Quiz

249 Questions | Total Attempts: 58

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CDC Quizzes & Trivia

Quiz over all 3 volume's UREs


Questions and Answers
  • 1. 
    What is a major difference between a gas and a liquid?
    • A. 

      A liquid is far less compressible than a gas.

    • B. 

      A gas is far less compressible than a liquid.

    • C. 

      A liquid is more combustible than a gas.

    • D. 

      A gas is more combustible than a liquid.

  • 2. 
    What is the lifting force of a liquid called?
    • A. 

      Laminar.

    • B. 

      Interface.

    • C. 

      Buoyance.

    • D. 

      Dynamic pressure.

  • 3. 
    Which best describes immiscible liquids?
    • A. 

      They mix well together.

    • B. 

      One liquid will float on the other.

    • C. 

      They will become an intrained solution.

    • D. 

      They will repel each other and react violently.

  • 4. 
    Which unit of measurement would indicate velocity of flow?
    • A. 

      Feet per second

    • B. 

      Gallons per minute.

    • C. 

      Cubic feet per second.

    • D. 

      Cubic gallons per minute.

  • 5. 
    Which physical factor affects the behavior of liquids in both rest and motion?
    • A. 

      Friction, applied forces, and gravity.

    • B. 

      Friction, inertia, and atmospheric pressure.

    • C. 

      Gravity, atmospheric pressure, and inertia.

    • D. 

      Gravity, atmospheric pressure, and applied forces.

  • 6. 
    What determines the intensity of the excess pressure in a water-hammer wave?
    • A. 

      The size of the pipe.

    • B. 

      The specific gravity of the fuel.

    • C. 

      The change in gallons per minute.

    • D. 

      The amount of extinguished velocity.

  • 7. 
    Which type of measurement may be used to express pressure?
    • A. 

      Kilograms.

    • B. 

      Pounds.

    • C. 

      Tons.

    • D. 

      Pounds per square inch.

  • 8. 
    The standard measure for atmospheric pressure is equal to how many pounds per square inch?
    • A. 

      13.1 psi.

    • B. 

      14.7 psi.

    • C. 

      15.2 psi.

    • D. 

      17.9 psi.

  • 9. 
    What type of pressure reading is also referred to as overpressure?
    • A. 

      Zero pressure.

    • B. 

      Gauge pressure.

    • C. 

      Absolute pressure.

    • D. 

      Atmospheric pressure.

  • 10. 
    What term is used to describe the total pressure acting as a gas?
    • A. 

      Overpressure.

    • B. 

      Gauge pressure.

    • C. 

      Absolute pressure.

    • D. 

      Atmospheric pressure.

  • 11. 
    Which temperature scale is commonly used for scientific measurements?
    • A. 

      Kelvin scale.

    • B. 

      Rankine scale.

    • C. 

      Réaumur scale.

    • D. 

      Fahrenheit scale.

  • 12. 
    Which gas law declares that cooling a gas decreases its volume?
    • A. 

      Boyle’s law.

    • B. 

      Charles’ law.

    • C. 

      Dalton’s law.

    • D. 

      Gay-Lussac’s law.

  • 13. 
    Two or more atoms combined is called a
    • A. 

      A compound.

    • B. 

      An element.

    • C. 

      A molecule.

    • D. 

      A mixture.

  • 14. 
    According to the electron theory, atoms are composed of
    • A. 

      Protons, neutrons, and electrons.

    • B. 

      Neutrons, elements, and protons.

    • C. 

      Electrons, molecules, and elements.

    • D. 

      Electrons, neutrons, and matter.

  • 15. 
    How do the charges of protons and electrons differ?
    • A. 

      Protons have positive charges, and electrons have neutral charges.

    • B. 

      Protons have neutral charges, and electrons have positive charges.

    • C. 

      Protons have negative charges, and electrons have positive charges.

    • D. 

      Protons have positive charges, and electrons have negative charges.

  • 16. 
    The uniform movement of electrons in a specific direction is called
    • A. 

      Electrical potential.

    • B. 

      Free electrons.

    • C. 

      Electric current.

    • D. 

      Ionization.

  • 17. 
    Which shell of the valence electrons determines whether a material is a good or a poor conductor of electricity?
    • A. 

      The outermost shell.

    • B. 

      The middle shell.

    • C. 

      The second shell.

    • D. 

      The first shell.

  • 18. 
    Which statement best describes a positive ion?
    • A. 

      An atom that lost a proton and has more electrons.

    • B. 

      An atom that lost an electron and has more protons.

    • C. 

      An atom that has an equal number of electrons and protons.

    • D. 

      An atom that cannot throw off any protons.

  • 19. 
    What effect of current causes an electric motor to produce mechanical energy?
    • A. 

      Heat.

    • B. 

      Magnetism.

    • C. 

      Chemical.

    • D. 

      Reactance.

  • 20. 
    What is the unit of measurement for electrical power?
    • A. 

      Watts.

    • B. 

      Volts.

    • C. 

      Amps.

    • D. 

      Ohms.

  • 21. 
    A 3-horsepower motor consumes how much power?
    • A. 

      755 W.

    • B. 

      1,534 W.

    • C. 

      2,023 W.

    • D. 

      2,238 W.

  • 22. 
    A magnet that is magnetized by induction from an external source is called
    • A. 

      A natural magnet.

    • B. 

      An electromagnet.

    • C. 

      An artificial magnet.

    • D. 

      An electromechanical magnet.

  • 23. 
    When do the magnetic lines of force in a magnet cross?
    • A. 

      When the north pole of a magnet is placed near the north pole of another magnet.

    • B. 

      When the south pole of a magnet is placed near the north pole of another magnet.

    • C. 

      When a permanent magnet and a temporary magnet are put together.

    • D. 

      Magnetic lines of force never cross each other.

  • 24. 
    What are the two most common methods of producing voltage?
    • A. 

      Magnetic and heat.

    • B. 

      Chemical and heat.

    • C. 

      Chemical and mechanical.

    • D. 

      Magnetic and mechanical.

  • 25. 
    What type of current flow is the result of voltages produced by batteries and thermocouples?
    • A. 

      Open current.

    • B. 

      Direct current.

    • C. 

      Latent current.

    • D. 

      Alternating current.

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