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A standard rate turn through 270 degrees takes

  • A.60 seconds
  • B.45 seconds
  • C.120 seconds
  • D.90 seconds

Answer: D

Correct answer: 90 seconds

A standard rate turn is 3 degrees per second, so

\[ \frac{270}{3} = 90\ \mathrm{s} \]

The rate is chosen so that a full 360-degree turn takes two minutes, which makes mental timing straightforward - a quarter turn in 30 seconds, a half in 60. That convenience is the reason the standard rate is defined at all, and it underlies the timed procedure turns of instrument flying.

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