Ure 2F071 Pretest

100 Questions | Total Attempts: 778

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CDC Quizzes & Trivia

CDC 2F071Volumes I, II, III 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 entrained 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. 

      17.0 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. 

      Reaumur 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 of electrical power?
    • A. 

      Watts

    • B. 

      Volts

    • C. 

      Amps

    • D. 

      Ohms

  • 21. 
    A 3-hoursepower 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