ASVAB ASVAB-SECTION-5 Online Practice Questions and Exam Preparation

ASVAB ASVAB-SECTION-5 Online Questions & Answers

• Question 31:

  A 9-volt transistor contains __________.

  A. 1 cell
  B. 6 cells
  C. 9 cells
  D. 3 cells
  B. 6 cells

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  Explanation

  A cell is equal to about 1.5 volts, so 9 ?1.5 = 6.

• Question 32:

  Transistors contain at least three terminals called the __________.

  A. base, emitter, and collector
  B. base, positive terminal, and negative terminal
  C. emitter, amplifier, and collector
  D. base and two gates
  A. base, emitter, and collector

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  Explanation

  The three terminals a transistor must have are the base, emitter, and collector.

• Question 33:

  A parallel circuit with resistors of 10 ohms, 10 ohms, and 5 ohms has a total resistance of __________.

  A. 10 ohms
  B. 5 ohms
  C. 25 ohms
  D. 2. 5 ohms
  D. 2. 5 ohms

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  Explanation

  Total resistance of a parallel circuit can be found two ways: by using the reciprocal formula or by using the product of two resistors divided by the sum of the two resistors divided by the sum of the two and then using it again to obtain the final

  answer in the case of three in parallel.

  In this case the two 10-ohm resistors will reduce to an equivalent of 5 ohms.

  This leaves, then, two 5-ohm resistors in parallel, which reduce to 2. 5 or half of the value of one.

• Question 34:

  A circuit contains three parallel resistors. Each resistor has 3 amps flowing through them. What is the total current flowing through the circuit?

  A. 1 A
  B. 3 A
  C. 9 A
  D. 1.5 A
  C. 9 A

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  Explanation

  For resistors in parallel, the total current is equal to the sum of the currents through each resistor.

• Question 35:

  Ohm's law states __________.

  A. Voltage = Current ?Resistance
  B. Amperes = Current ?Resistance
  C. Voltage = Resistance ?Amperes
  D. Ohms = Voltage ?Current
  A. Voltage = Current ?Resistance

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  Explanation

  Ohm's law states that Voltage (V) = Current (I) ?Resistance (R). All other answers are incorrect expressions of this law.

• Question 36:

  The symbol for inductance is __________.

  A. XL
  B. I
  C. L
  D. XC
  C. L

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  Explanation

  The symbol for inductance is L. The symbol for an inductor is a loop as in a coil of wire.

• Question 37:

  

  In the diagram of a transistor provided, the letter B corresponds with the ___________.

  A. controller
  B. emitter
  C. base
  D. collector
  B. emitter

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  Explanation

• Question 38:

  A resistor marked 2. 5K ohms has the value of __________.

  A. 2. 5 ohms
  B. 250 watts
  C. 2,500 ohms
  D. 25,000 ohms
  C. 2,500 ohms

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  Explanation

  2. 5K ohms is 2,500 ohms. K = one kilo or 1,000.

• Question 39:

  Which of the following isn't a conductor of electricity?

  A. water
  B. graphite
  C. gold
  D. glass
  D. glass

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  Explanation

  Glass is an insulator. Other insulators are plastics, paper, and rubber.

• Question 40:

  To control a light fixture from two different wall switches, you should use __________.

  A. a single-pole switch and a four-way switch
  B. two three-way switches
  C. two four-way switches
  D. two single-pole switches
  B. two three-way switches

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  Explanation

  To control a light fixture from two different positions, use two three-way switches.