ASVAB Diagnostic Test

Part 6: Electronics Information (EI)

9 Minutes 20 Questions

  3. Directions: In this section, you will be tested on your knowledge of electronics basics. For each question, select the best answer and mark the corresponding oval on your answer sheet.

  4. A load
    1. has very low resistance and conducts current throughout the circuit
    2. is a device that converts electrical energy into heat, light, or motion
    3. is a voltage source
    4. switches electrical current off and on
  5. Which of the following symbols represents a photosensitive diode?
    1. image
    2. image
    3. image
    4. image
  6. One hertz is equivalent to
    1. one cycle per second of any continuous process
    2. an acceleration of 1 m/s2
    3. a change in frequency of one cycle per second per second
    4. the negative of the period
  7. A(n) is an element that freely conducts electricity.
    1. insulator
    2. conductor
    3. semiconductor
    4. molecule
  8. Which of the following CANNOT describe an “earth ground” in home electricity?
    1. a buried conduit
    2. a copper rod driven into the ground
    3. a device made to protect occupants from electrical shock
    4. a device for measuring electrical resistance
  9. Electron flow theory states that
    1. electrons flow best through liquids
    2. electrons flow from areas of excess negative charge to areas of less negative charge
    3. electrons flow from areas of excess positive charge to areas of less positive charge
    4. electrons can only flow from one area to another if there is no resistance
  10. The “electrical pressure” that causes electrons to flow in one direction through a conducting path is a result of
    1. a voltage
    2. a difference in resistance
    3. parallel paths
    4. a wire moving downhill
  11. This is the symbol for which type of meter?
    image
    1. voltmeter
    2. ammeter
    3. ohmmeter
    4. galvanometer
  12. What type of circuit does this symbol represent?
    image
    1. parallel circuit
    2. series-parallel circuit
    3. series circuit
    4. short circuit
  13. Under a constant voltage, increasing resistance results in current flow
    1. dropping
    2. rising
    3. staying the same
    4. changing direction
  14. Increasing the voltage in a circuit and keeping resistance the same will result in
    1. increased current flow
    2. decreased current flow
    3. current flow staying the same
    4. zero current flow
  15. Several loads in series have different resistances. Given that the same current flows through each of them, what relationship does Ohm’s law predict between resistance and voltage drop?
    1. Larger voltage drops occur across loads with greater resistances.
    2. Smaller voltage drops occur across loads with greater resistances.
    3. Larger voltage drops occur across loads with lesser resistances.
    4. An equal voltage drop occurs across each load in series, independent of resistance.
  16. Capacitive reactance decreases as electrical frequency
    1. decreases
    2. increases
    3. varies
    4. gets closer to DC
  17. Which is the emitter in the transistor symbol below?
    image
    1. 1
    2. 2
    3. 3
    4. 4
  18. Which of the following CANNOT be used to make the magnetic field in a coil of wire stronger?
    1. increasing the number of turns of wire in the coil
    2. increasing the current flowing through the coil
    3. inserting an iron core into the middle of the coil
    4. inserting a dielectric between each coil
  19. Whenever current passes through a resistance, is most often generated.
    1. voltage
    2. capacitance
    3. heat
    4. light
  20. The formula for Ohm’s Law is
    1. V = I × R
    2. V = I − R
    3. V = I + R
    4. V = I ÷ R
  21. If current is able to pass through a diode, the diode must be
    1. reverse-biased
    2. forward-biased
    3. open
    4. grounded
  22. Transistors are turned on and off by voltages applied to their
    1. collector
    2. emitter
    3. base
    4. cathode
  23. If each resistor in this circuit equals 1,000 ohms, what is the total resistance in this circuit?
    image
    1. 250 ohms
    2. 500 ohms
    3. 1,000 ohms
    4. 4,000 ohms