Fuselage, Wings and Stabilizing Surfaces: DGCA Technical General questions

Question 1

How can wing bending moments be reduced in flight?

Accepted Answer

By using aileron up-float and using the fuel in the wings last.

Answer

By using aileron up-float and keeping the centre section fuel tanks full for as long as possible.

Answer

By having tail-mounted engines and using aileron down-float.

Answer

By having wing-mounted engines and using the wing fuel first.

Question 2

Regarding a safe life structure:
1. will only fail after a known number of operations or hours of use.
2. should not fail until a predicted number of fatigue cycles has been achieved.
3. has a programmed inspection cycle to detect and rectify faults.
4. is changed before its predicted life is reached.

Accepted Answer

2 and 4 apply.

Answer

1 and 2 apply.

Answer

1 and 3 apply.

Answer

2, 3 and 4 apply.

Question 3

A cantilever wing:

Accepted Answer

Is supported at one end only with no external bracing.

Answer

Is externally braced with either struts and/or bracing wires.

Answer

Has both an upper and lower aerofoil section.

Answer

Folds at the root section to ease storage in confined spaces.

Question 4

What is the purpose of wing ribs?

Accepted Answer

To shape the wing and support the skin.

Answer

To withstand the fatigue stresses.

Answer

To house the fuel and the landing gear.

Answer

To provide local support for the skin.

Question 5

In the construction of airframes the primary purpose of frames or formers is to:

Accepted Answer

Oppose hoop stresses and provide shape and form to the fuselage.

Answer

Provide a means of attaching the stringers and skin panels.

Answer

Form the entrance door posts.

Answer

Support the wings.

Fuselage, Wings and Stabilizing Surfaces: DGCA Technical General questions

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