A&P airframe 6 Please provide explanations or reason for the answer 1. Aliphatic

Question

A&P airframe 6

Please provide explanations or reason for the answer

1. Aliphatic naptha is used to
A. protect areas that can’t easily be masked.
B. allow masking tape to be removed sooner.
C. remove thick edges where tape has been peeled off
D. soak off cured on masking tape.
2. Most efficient braking of aircraft wheels occurs
A. when the wheels are locked into a skid.
B. when the pressure is almost, but not quite, high enough to
cause skidding.
C. when the brake pressure is well below that needed to cause
skidding.
D. when the wheels are intermittently brought to skid pressure,
then released

3. To fully charge a 24-volt battery, an alternator or generator must produce approximately
_______ volts.
A. 12    C. 28
B. 24                    D. 48

Explanation / Answer

1. Since Aliphatic Naptha is used as a cleaning agent, it can remove residues left by masking tape. The answer is C.

2. On landing, the deployment of lift dumpers causes a dramatic loss of lift and hence the weight of the aircraft is transferred from the wings to the undercarriage, allowing the wheels to be mechanically braked with much less chance of skidding. Therefore, the answers is C.

3. A typical 24-volt lead-acid battery must be taken to approximately 28 VDC before it is fully charged. If taken to a lower voltage level, some of the sulfate deposits that form during discharge will remain on the plates. Therefore, the answer is C.

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