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

ASVAB ASVAB-SECTION-5 Online Questions & Answers

• Question 111:

  

  What is the voltage across the load R and the current through R when the switch is open in the following circuit?

  A. The current is 0 A; the voltage is 10 V.
  B. The current is 2 A; the voltage is 10 V.
  C. The current is 2 A; the voltage is 2 V.
  D. The current is 0 A; the voltage is 0 V.
  D. The current is 0 A; the voltage is 0 V.

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  Explanation

  When the switch is open, no current flows. The voltage VR is I times R, which equals 0(5) = 0.

• Question 112:

  How wide is the full AT motherboard?

  A. 11 inches
  B. 11.5 inches
  C. 12 inches
  D. 12. 5 inches
  C. 12 inches

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  Explanation

  A motherboard is the physical arrangement in a computer that contains the computer's basic circuitry and components.

• Question 113:

  The klystron is used in __________.

  A. low-frequency transmitters
  B. radar units
  C. audio frequency amplifiers
  D. frequency detectors
  B. radar units

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  Explanation

  The klystron is used as a frequency source in microwave units ?from a microwave oven for the kitchen to a radar unit for an aircraft

• Question 114:

  An oscilloscope is typically used to analyze __________.

  A. resistance
  B. power in a circuit
  C. complex waveforms
  D. simple circuits
  C. complex waveforms

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  Explanation

  An oscilloscope is used primarily to look at complex waveforms.

• Question 115:

  Electrical "pressure" is also known as ___________.

  A. charge
  B. conductivity
  C. voltage
  D. ohms
  C. voltage

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  Explanation

• Question 116:

  

  This symbol means __________.

  A. ohm
  B. ampere
  C. high voltage
  D. wattage
  A. ohm

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  Explanation

  The symbol stands for ohm.

• Question 117:

  What is the frequency of the alternating voltage and current typically used in the United States?

  A. 40 hz
  B. 50 hz
  C. 60 hz
  D. 110 hz
  C. 60 hz

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  Explanation

  Electricity in the U.S. has a frequency of 60 hz.

• Question 118:

  The Greek letter phi () is used to __________.

  A. indicate ohms
  B. indicate angles or phases
  C. indicate volts
  D. indicate dielectric flux
  B. indicate angles or phases

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  Explanation

  The Greek alphabet is used almost in its entirety in the electrical field to represent various quantities and effects. The Greek letter phi () is familiar if you have been looking at three-phase power. It is used to represent the phases of electrical power.

• Question 119:

  If you plug an appliance designed for AC into a DC power source, the appliance __________.

  A. will operate normally
  B. will produce excessive heat
  C. won't operate
  D. will explode into tiny pieces
  B. will produce excessive heat

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  Explanation

  When DC is applied to an AC appliance, the amount of resistance is less, so more current flows through the wire and heat builds up.

• Question 120:

  Opposition to current flow is measured in __________.

  A. ohms
  B. amps
  C. volts
  D. watts
  A. ohms

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  Explanation

  The unit of measure for resistance or opposition to current flow is the ohm. It was agreed on many years ago and has aided in making the electrical field progress so rapidly.