Which of the following are acceptable to use in cleaning anodized surfaces?
•  Steel wool, aluminium wool, fibre bristle brush.
•  Aluminium wool, fibre bristle brush.
•  Brass wire brush, stainless steel wire brush.

Miguel Angel asking:
•  Please write your question here.

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Copper is an inferior conductor to aluminium when comparing
•  weight for weight.
•  CSA with CSA.
•  load for load.

Miguel Angel asking:
•  Please write your question here.

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When the rotor blade increases its angle of attack, the centre of pressure
•  does not move.
•  moves rearwards.
•  moves forward.

Storklubba asking:
•  Centre of pressure moves forward when AOA is increased?

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A diode connected across a coil will
•  prevent the coil being fitted the wrong way.
•  prevent back EMF and allow faster switching.
•  suppress arcing when relay is opening and closing.

Storklubba asking:
•  I think "prevent back EMF and allow faster switching" is the correct answer

Community comments: 0

A battery in situ on an aircraft
•  charges at a fairly constant rate because generator voltage remains constant.
•  may charged at an excessive rate if initial battery voltage is low.
•  may charge slowly if initial battery voltage is low.

Storklubba asking:
•  What is meant by "situ"?

Community comments: 0