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

ASVAB ASVAB-SECTION-5 Online Questions & Answers

• Question 101:

  

  What is the voltage across and current through the resistor R when the switch is open?

  A. 0 A Current; 8 V voltage
  B. 2 A Current; 2 V voltage
  C. 0 A Current; 0 V voltage
  D. 2 A Current; 8 V voltage
  C. 0 A Current; 0 V voltage

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  Explanation

  When the switch is open, there is no voltage or current.

• Question 102:

  Capacitors connected in parallel __________.

  A. produce less capacitance.
  B. produce more capacitance.
  C. are capable of handling more voltage.
  D. produce a higher WVDC rating.
  B. produce more capacitance.

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  Explanation

  Capacitors connected in parallel effectively increase the plate area, which allows for more storage of electrons and more capacity or capacitance.

• Question 103:

  In electronics this symbol represents a __________.

  

  A. cathode ray tube
  B. diode
  C. resistor
  D. insulator
  B. diode

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  Explanation

  The symbol shown represents a diode.

• Question 104:

  A conductor is any material that __________.

  A. has no free electrons
  B. has many free electrons
  C. has free ions
  D. has free protons
  B. has many free electrons

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  Explanation

  Conductors have free electrons that are easily moved along with the right kind of push or force. There are a number of ways to cause these electrons to progress along a conductor. Heat, light, magnetism, chemicals, pressure, and friction can cause the generation of an EMF useful in causing electrons to move along a conductor.

• Question 105:

  Electricians use the term low potential to refer to __________.

  A. electrical circuits with a low potential for overload
  B. building codes that reduce the risk of fire
  C. the likelihood of getting a raise this year
  D. 600 watts or less
  D. 600 watts or less

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  Explanation

  Potential equals voltage; low potential is anything less than 600 watts.

• Question 106:

  The folded dipole antenna has an impedance of __________.

  A. 72 ohms
  B. 300 ohms
  C. 600 ohms
  D. 75 ohms
  B. 300 ohms

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  Explanation

  The folded dipole antenna ?the one most commonly used for home TV reception ?has an impedance of 300 ohms. The dipole has an impedance of 72 ohms.

• Question 107:

  Electronic circuits that produce high frequency AC are called __________.

  A. amplifiers
  B. regulators
  C. transformers
  D. oscillators
  D. oscillators

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  Explanation

  Oscillators produce high-frequency AC.

• Question 108:

  Changing alternating current to direct current is called __________.

  A. capacitance
  B. impedance
  C. rectification
  D. induction
  C. rectification

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  Explanation

  Changing AC to DC is a process called rectification.

• Question 109:

  Which function does the receiving antenna provide in radio communication?

  A. It catches the signal out of the air.
  B. It separates the carrier wave from the signal.
  C. It mixes the signal and the carrier wave.
  D. It broadcasts the signal over the air.
  A. It catches the signal out of the air.

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  Explanation

  The broadcast antenna is used to broadcast the signal over the air. The mixer combines the signal and carrier wave. The de-mixer separates the carrier and the signal.

• Question 110:

  The measurement "mil" refers to __________.

  A. a quarter or an inch
  B. one thousandth of an inch
  C. a millionth of an inch
  D. a hundredth of an inch
  B. one thousandth of an inch

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  Explanation

  A "mil" (from milli) refers to one thousandth.