Practice Quiz

ASVAB Science and Tech Practice Questions - Question List

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86. An exchange student in Europe calls a friend in Boston. The call travels through a fiberoptic cable under the ocean. Which of the following components of the communications system converts the student’s voice into light pulses that can be carried through the fiberoptic cable?
  1. encoder
  2. retriever
  3. source
  4. decoder
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87. In the winter, heavy curtains are often hung in front of windows. What effect do these curtains have on heat transfer?
  1. The curtains reduce convective heat transfer.
  2. The curtains increase conductive heat transfer.
  3. The curtains reduce heat transfer from evaporation.
  4. The curtains increase heat transfer from condensation.
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88. The owners of a grocery store chain have decided to try a hand-held bar code scanner for customers to use as they shop. After developing the prototype of the hand-held bar code scanner, what is the next step in the new product development?
  1. refining the scanner for production
  2. advertising the scanner in all stores
  3. field testing the scanner in selected stores
  4. mass-producing the scanner for all stores
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89. Which of the following will offer the most resistance to water flow?
  1. a pipe with a large diameter
  2. a pipe with several elbows
  3. a pipe with no corrosion
  4. a pipe that is straight
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90. Carlos wants to use a pneumatic system to operate an assembly line. Which of the following must be included in the pneumatic system?
  1. transformers, generators, and turbines
  2. pumps, lines, and oil
  3. motors, gears, and electrical switches
  4. compressors, valves, and air
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