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

ASVAB ASVAB-SECTION-5 Online Questions & Answers

• Question 141:

  What is the total resistance when two 10 ohm resistors are connected in series?

  A. 5 ohms
  B. 10 ohms
  C. 20 ohms
  D. 100 ohms
  C. 20 ohms

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  Explanation

  When resistors are in series, you simply add their resistance together to find a total resistance. 10 + 10 = 20 ohms.

• Question 142:

  Which of these elements is considered a semiconductor?

  A. sulfur
  B. magnesium
  C. argon
  D. silicon
  D. silicon

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  Explanation

• Question 143:

  How many wires do serial cables used on computers have?

  A. 3
  B. 9
  C. 15
  D. 25
  B. 9

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  Explanation

  This is true, even if the cable has a 25-pin connector. Serial cables are often used to connect computers to perpetual devices.

• Question 144:

  Resistance is measured in __________.

  A. Watts
  B. Volts
  C. Ohms
  D. Farads
  C. Ohms

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  Explanation

  Resistance is measure in ohms.

• Question 145:

  The nucleus of an atom contains what two subatomic particles?

  A. protons and gamma particles
  B. neutrons and electrons
  C. protons and electrons
  D. protons and neutrons
  D. protons and neutrons

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  Explanation

• Question 146:

  Another name for cycles per second is __________.

  A. watts
  B. voltage
  C. hertz
  D. amperes
  C. hertz

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  Explanation

  The number of times alternating current changes direction in one second is known as its frequency, which is measured in hertz.

• Question 147:

  A capacitor is used to perform which of these in an electrical circuit?

  A. reduce current
  B. store an electrical charge
  C. increase voltage
  D. prevent shock
  B. store an electrical charge

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  Explanation

• Question 148:

  The symbol below is used in electrical diagrams to represent a __________.

  

  A. resistor
  B. capacitor
  C. transformer
  D. transistor
  B. capacitor

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  Explanation

  The symbol is used in electrical diagrams to represent a capacitor.

• Question 149:

  A 120 V light bulb is rated for 40 watts. What is the light bulb's current rating?

  A. 3 A
  B. 1/3 A
  C. 2 A
  D. 1 A
  B. 1/3 A

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  Explanation

  P = IV, so I = P/V or I = 40 Watts/120 V = 1/3 A

• Question 150:

  

  The symbol above stands for __________.

  A. battery
  B. inductor
  C. transformer
  D. diode
  C. transformer

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  Explanation

  The symbol stands for transformer. Transformers are used to step up (increase) and step down (decrease) AC voltages.