Free ASVAB Section 7: General Science Exam Braindumps (page: 56)

Page 56 of 97

A light bulb is 60 watts.
Operated at 120 volts, how much current does it draw?

  1. 0.5 ampere
  2. 5.0 amperes
  3. 50.0 amperes
  4. 7.200 amperes

Answer(s): A

Explanation:

Power = Current × Voltage or, written another way, Current = Power/Voltage. 60 ⁄ 120 = 0.5 ampere.



A number-12 wire, compared to a number-6 wire ______________.

  1. is longer
  2. is shorter
  3. is smaller in diameter
  4. is larger in diameter

Answer(s): C

Explanation:

The larger the number, the smaller (in diameter) the wire.



A fuse with a higher-than-required rating used in an electrical circuit ______________.

  1. improves safety
  2. increases maintenance
  3. may not work properly
  4. is less expensive

Answer(s): C

Explanation:

Because fuses are designed to prevent current overload at a specific level, a fuse with a high rating may not work properly for a circuit rated at a lower level.



Neutral wire is always _______________.

  1. whitish or natural
  2. black
  3. green
  4. blue

Answer(s): A

Explanation:

Neutral wire is always whitish or natural colored.



Page 56 of 97



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