ASVAB PRACTICE TEST B

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. Voltage and current are

    1. inversely proportional
    2. directly proportional
    3. unrelated
    4. sometimes proportional

  5. For a current-carrying wire with a DC source providing a constant 100 amps, which of the following set-ups will produce the largest magnetic field strength at any given point?

    1. a simple single-loop circuit made of two meters of wire
    2. a simple single-loop circuit made of five meters of wire
    3. wrapping the two meters of current-carrying wire in five coiled loops around an iron nail
    4. wrapping the five meters of current-carrying wire in five coiled loops

  6. Which of the following causes the least resistance to a consistent direct current?

    1. a capacitor
    2. a fixed resistor
    3. a variable resistor
    4. an inductor

  7. Which is the base in the transistor symbol below?

    44227.png
    1. 1
    2. 2
    3. 3
    4. 4

  8. If each resistor in this circuit equals 750 ohms, what is the total resistance in this circuit?

    44227.png
    1. 250 ohms
    2. 375 ohms
    3. 750 ohms
    4. 1,500 ohms

  9. Counter-emf is produced by a process known as

    1. inductive resistance
    2. capacitive resistance
    3. self-induction
    4. doping

  10. In a simple series circuit, what resistance will allow 5 mA to flow when 50 volts is applied to it?

    1. 0.1 Ω
    2. 250 Ω
    3. 10 KΩ
    4. 250 KΩ

  11. What is the proper term for the circuit pictured?

    44227.png
    1. series circuit
    2. parallel circuit
    3. series-parallel circuit
    4. integrated circuit

  12. Adding a resistor in parallel with an existing load

    1. always increases the effective resistance
    2. always decreases the effective resistance
    3. sometimes increases the effective resistance
    4. sometimes decreases the effective resistance

  13. N-type material can conduct electricity because of

    1. silicon’s unique structure
    2. a free electron outside the valence shell
    3. a free electron inside the valence shell
    4. an overall negative charge

  14. Which is a type of transistor?

    1. NPN
    2. NNP
    3. PPN
    4. NNN

  15. What is the effective resistance of a 2 Ω resistor and 4 Ω resistor if they are wired in parallel?

    1. Ω
    2. 1 Ω
    3. 3 Ω
    4. 6 Ω

  16. A circuit contains two 3 Ω resistors in series. What is their effective resistance?

    1. Ω
    2. Ω
    3. 3 Ω
    4. 6 Ω

  17. Adding an additional resistor to a circuit in series with the previous resistor

    1. always increases the effective resistance
    2. always decreases the effective resistance
    3. sometimes increases the effective resistance
    4. sometimes decreases the effective resistance

  18. An element with five electrons in its valence shell is a(n)

    1. conductor
    2. semiconductor
    3. insulator
    4. metal

  19. An ampere is defined as one of electrical charge flowing past a point in one second.

    1. hertz
    2. coulomb
    3. ohm
    4. voltage

  20. Unlike capacitors, inductors

    1. allow DC current to pass easily
    2. store charge
    3. turn DC power around to increase power
    4. have two parallel plates

  21. A circuit initially contains only one load which has a resistance of 5 Ω. Assuming this is the only component of the circuit which provides any resistance initially, which of the following additions would decrease the effective resistance of the circuit by half?

    1. Adding a resistor of 2.5 Ω in series with the original load
    2. Adding a resistor of 2.5 Ω in parallel with the original load
    3. Adding a resistor of 5 Ω in series with the original load
    4. Adding a resistor of 5 Ω in parallel with the original load

  22. This is the symbol for which type of meter?

    44227.png
    1. voltmeter
    2. ammeter
    3. ohmmeter
    4. galvanometer

  23. All of the following statements about series circuits are true, EXCEPT

    1. current flow is the same throughout
    2. there is only one path for current to follow
    3. current flow varies throughout the circuit
    4. voltage drops across the loads depend on their resistance