1s051 Volume III Pretest (For Reference Use Only)

100 Questions | Total Attempts: 71

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Pretest Quizzes & Trivia

USAF Safety Journeyman Volume III Pretest (FOR REFERENCE USE ONLY)


Questions and Answers
  • 1. 
    (401) The flow of electricity may be compared to
    • A. 

      A streak of lightning.

    • B. 

      Water running through a pipe.

    • C. 

      Water passing through the ground.

    • D. 

      Lightning passing through the ground.

  • 2. 
    (401) What unit of measurement is used to measure electrical current?
    • A. 

      Volts.

    • B. 

      Ohms.

    • C. 

      Amperes.

    • D. 

      Coulombs.

  • 3. 
    (401) How is electrical current measured when you want to describe its effect on the human body?
    • A. 

      Ohms.

    • B. 

      Amperes.

    • C. 

      Resistance.

    • D. 

      Milliamperes.

  • 4. 
    (401) Resistance is any condition that
    • A. 

      Opposes or restricts the flow of electricity.

    • B. 

      Increases the voltage of electrical flow.

    • C. 

      Aids the conduction of electricity.

    • D. 

      Keeps a circuit closed.

  • 5. 
    (402) An electrical outlet must be protected by a ground fault circuit interrupter (GFCI) when it is located within how many feet of a sink?
    • A. 

      6.

    • B. 

      8.

    • C. 

      10.

    • D. 

      12.

  • 6. 
    (402) Which safety rule should be observed where extension cords are used?
    • A. 

      Extension cords should be taped to a wall instead of lying on the floor.

    • B. 

      A long extension cord should be coiled.

    • C. 

      Extension cords must not be run through ceiling holes.

    • D. 

      Extension cords should not be used for small appliances.

  • 7. 
    (402) Who is responsible for helping supervisors mark all circuit breaker boxes with the correct voltage?
    • A. 

      Shop personnel.

    • B. 

      Ground safety personnel.

    • C. 

      Civil engineering personnel.

    • D. 

      Circuit breaker box manufacturer.

  • 8. 
    (403) What type of electrical cell can be restored to a charged condition by passing an electrical current through the cell in the opposite direction of the discharging current?
    • A. 

      Primary cell.

    • B. 

      Storage cell.

    • C. 

      Electrode cell.

    • D. 

      Negative electrode cell.

  • 9. 
    (403) When electrical pressure is generated by chemical action, the device in which this occurs is called
    • A. 

      A neutronic cell.

    • B. 

      An electrical cell.

    • C. 

      A chemical cell.

    • D. 

      A lead cell.

  • 10. 
    (403) An electrical cell consists of
    • A. 

      A negative electrode, electrolyte, and a circuit.

    • B. 

      Positive and negative poles, and a potential circuit.

    • C. 

      A positive electrode, negative electrode, and an electrolyte.

    • D. 

      An electrolyte compound, a circuit continuity, and an electrical charge.

  • 11. 
    (403) In battery shop operations, how should sulfuric acid and water be mixed together?
    • A. 

      Pour water slowly into acid.

    • B. 

      Pour acid slowly into water.

    • C. 

      Combine in a metal container.

    • D. 

      Combine with a diluting agent.

  • 12. 
    (403) Where can you find the standard for Air Force electrical systems and operations?
    • A. 

      Major command (MAJCOM) USAF directives.

    • B. 

      National Electric Code (NEC).

    • C. 

      Department of Defense (DOD) Electrical Systems Instruction.

    • D. 

      USAF Fire Prevention Code.

  • 13. 
    (404) One complete cycle of alternating current (AC) is composed of
    • A. 

      One alternation of current.

    • B. 

      One negative pulse of current.

    • C. 

      Two alternations of current (both in the same direction).

    • D. 

      Two alternations of current (one in one direction and one in the other).

  • 14. 
    (404) Which device is used to change power from one voltage to another?
    • A. 

      Transformers.

    • B. 

      Capacitors

    • C. 

      Rectifiers.

    • D. 

      Filters.

  • 15. 
    (405) The primary factor influencing the severity of electrical shock to the human body is the
    • A. 

      Length of the exposure.

    • B. 

      Amount of the current flow.

    • C. 

      Level of the voltage applied.

    • D. 

      Frequency of the electrical charge.

  • 16. 
    (405) How much current causes a normally harmless shock to be felt?
    • A. 

      1 milliampere.

    • B. 

      25 milliamperes.

    • C. 

      1 ampere.

    • D. 

      25 ampere.

  • 17. 
    (406) What is the purpose of placing bonding wire between two metal objects?
    • A. 

      Continuity of system grounds.

    • B. 

      Equalization of static charges that may be generated.

    • C. 

      Dissipation of static electrical charges to a ground.

    • D. 

      Prevention of accumulations of dynamic electricity.

  • 18. 
    (406) Grounding is used to control
    • A. 

      Static electrical charges only.

    • B. 

      Dynamic electrical charges only.

    • C. 

      Both dynamic and static electrical charges.

    • D. 

      Bonded equipment.

  • 19. 
    (406) An example of a system ground is a
    • A. 

      Three-prong adapter.

    • B. 

      Double-insulated tool.

    • C. 

      Return wire attached to a ground in the earth.

    • D. 

      Wire attached to the frame of a tool and a metal bar.

  • 20. 
    (406) Grounding is effective when
    • A. 

      There are no breaks in the grounding path.

    • B. 

      The grounding path is broken before it reaches the ground.

    • C. 

      Dynamic charges are converted into static charges.

    • D. 

      Static charges are converted into to dynamic charges.

  • 21. 
    (406) It is hard to maintain an effective ground for portable electric equipment because
    • A. 

      The equipment is relatively small in size.

    • B. 

      The equipment is moved about so much.

    • C. 

      The equipment uses a three-wire cord.

    • D. 

      The grounding prong on the plug has probably been removed.

  • 22. 
    (406) Which of the following is not a specific characteristic of effective grounds?
    • A. 

      All paths must be continuous.

    • B. 

      Equipment grounds should never exceed two ohms.

    • C. 

      All grounding points must be provided adequate protection against physical damage.

    • D. 

      The natural ground circuit resistance should be kept as far as possible below the maximum permissible limits.

  • 23. 
    (407) Which device is the simplest way to control an electrical circuit?
    • A. 

      Fuse.

    • B. 

      Relay.

    • C. 

      Interlock.

    • D. 

      Circuit breaker.

  • 24. 
    (407) What is a relay?
    • A. 

      A link of metal placed in series with a circuit.

    • B. 

      A switch that, when released, allows the current to flow uninterrupted.

    • C. 

      A device that communicates the information in a signal to another device.

    • D. 

      A device that tells the circuit breaker to interrupt current flow when the temperature rises.

  • 25. 
    (407) In electrical work, what is generally used to control large, high-voltage currents with a lowvoltage, low-current signal?
    • A. 

      Fuses.

    • B. 

      Relays.

    • C. 

      Interlocks.

    • D. 

      Circuit breakers.

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