Airframe Contamination: DGCA Technical General questions

Question 1

If it is suspected that ice may have formed on the tailplane and longitudinal control difficulties are experienced following flap selection, the prudent action to take would be:

Accepted Answer

Immediately decrease the flap setting.

Answer

Allow the speed to increase.

Answer

Select a greater flap deflection because this will increase CLMAX.

Answer

Reduce the angle of attack.

Question 2

After an aircraft has been exposed to severe weather:

Accepted Answer

All snow and ice should be removed.

Answer

Snow should be removed but smooth ice may be left.

Answer

Loose snow may be left but ice must be removed.

Answer

Providing the contamination is not too thick, it may be left in place.

Question 3

In the event of an icing-induced wing stall, which of the following indications will reliably be available to the flight crew? 1. Activation of the stall warning device horn or stick shaker. 2. The aircraft pitching nose down. 3. Loss of elevator effectiveness. 4. Airframe buffet. 5. A roll control problem increasing roll oscillation or violent wing drop. 6. A high rate of descent.

Accepted Answer

5 and 6.

Answer

1, 2, 3, 4, 5 and 6.

Answer

1, 3 and 4.

Answer

1, 4 and 6.

Question 4

When considering in-flight airframe contamination with frost or ice, which of the following statements is correct?

Accepted Answer

Visual evidence of the accumulation of airframe icing may not exist.

Answer

Build-up can be identified by the ice detection equipment fitted to the aircraft.

Answer

The pilot can visually identify build-up on the wings, tailplane or flight controls by looking through the flight deck windows; at night by using the ice detection lights.

Answer

Due to the high speed of modern aircraft, significant airframe contamination with frost, ice or snow will not occur.

Question 5

Frost covering the upper surface of an aircraft wing will usually cause:

Accepted Answer

The aircraft to stall at an angle of attack that is lower than normal.

Answer

No problems to pilots.

Answer

Drag factors so large that sufficient speed cannot be obtained for take-off.

Answer

The aircraft to stall at an angle of attack that is higher than normal.

Airframe Contamination: DGCA Technical General questions

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