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

ASVAB ASVAB-SECTION-5 Online Questions & Answers

• Question 61:

  

  The above symbol represents a/an __________.

  A. relay
  B. on-off switch
  C. push switch
  D. connected wire
  B. on-off switch

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  Explanation

  An on-off switch allows current to flow only when it's in the closed (on) position.

• Question 62:

  The FM band covers __________.

  A. 550 to 1,600 kHz
  B. 88 to 108 MHz
  C. 100 to 200 MHz
  D. 550 to 1600 MHz
  B. 88 to 108 MHz

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  Explanation

  The FM band covers 88 to 108 MHz. The AM band covers 550 to 1600 kilohertz.

• Question 63:

  The hot wire is always __________.

  A. blue
  B. green
  C. whitish
  D. black
  D. black

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  Explanation

  Live wires are black.

• Question 64:

  What should the temperature of a typical soldering iron be when joining two wires together?

  A. 200 to 300 degrees Fahrenheit
  B. 400 to 500 degrees Fahrenheit
  C. 500 to 600 degrees Fahrenheit
  D. 700 to 800 degrees Fahrenheit
  C. 500 to 600 degrees Fahrenheit

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  Explanation

  To properly melt solder, you should use a soldering iron heated between 500 and 600 degrees Fahrenheit.

• Question 65:

  In an FM receiver the AFC is __________.

  A. automatic frequency control for stabilizing the IF.
  B. automatic frequency control for stabilizing the local oscillator.
  C. automatic frequency control for tuning the incoming frequency.
  D. automatic frequency control for the radio frequency amplifier.
  B. automatic frequency control for stabilizing the local oscillator.

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  Explanation

  On an FM receiver the AFC is automatic frequency control. It keeps the receiver from drifting from the station it is tuned to. This is done by having part of the signal fed back to the local oscillator to keep it operating on the correct frequency and not drifting.

• Question 66:

  What is the reading on the kilowatt-hour meter shown below?

  

  A. 5703
  B. 5692
  C. 5693
  D. 5793
  B. 5692

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  Explanation

  The meter has four dials with the numbers 0 to 9. The pointers rotate in different directions. Read the dials from the left, using the number the dial pointer just passed.

• Question 67:

  Current that changes polarity many times per second is called __________.

  A. direct current
  B. oscillating current
  C. alternating current
  D. AC/DC current
  C. alternating current

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  Explanation

  Current that changes polarity many times per second is called alternating current.

• Question 68:

  Which of these is an acceptable symbol used for amperes?

  A. Ampo
  B. M
  C. Am
  D. A
  D. A

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  Explanation

• Question 69:

  Winding wire into a coil will have what effect on the magnetic field in the wire?

  A. The magnetic field will be removed.
  B. There will be no change.
  C. It will make it stronger.
  D. It will make it weaker.
  C. It will make it stronger.

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  Explanation

• Question 70:

  In an electrical circuit, if one wanted to reduce the current and/or divide the voltage, one would use a ___________.

  A. rectifier
  B. reducer
  C. reflector
  D. resistor
  D. resistor

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  Explanation