Standard Book, Technical General
Windshear: DGCA Technical General questions
Windshear is a sudden change in wind speed or direction, and near the ground it can remove airspeed faster than the aeroplane can regain it. The microburst, a strong downdraught that spreads out on reaching the ground, is a particularly dangerous form.
The 17 questions judge each shear by its effect on airspeed, then test microburst behaviour and recovery. Exam sessions have included 1 of this set.
A rising headwind or a falling tailwind is a gain: airspeed rises, the nose tends to pitch up and you float above the glide path. In a microburst that early gain is a trap, since the downdraught and tailwind follow, so do not take thrust off. Recovery is maximum available thrust and as much pitch as the stall warning allows, with configuration unchanged.
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Question 1 of 5
Which performance characteristics should be recognized during take-off when encountering a tailwind shear that increases in intensity?
Question 2 of 5
Which of the following statements are correct?\n1. A rapid increase in headwind is an 'energy gain'.\n2. A rapid loss of tailwind is an 'energy gain'.\n3. A shear from a tailwind to calm is an 'energy gain'.\n4. A shear from calm to a headwind is an 'energy gain'.\n5. A shear from headwind to calm is an 'energy loss'.
Question 3 of 5
Which of the following statements are correct?\n1. A downdraught is an 'energy gain'.\n2. A rapid loss of tailwind is an 'energy loss'.\n3. A shear from a tailwind to calm is an 'energy loss'.\n4. A shear from calm to a headwind is an 'energy gain'.\n5. A downdraught is an 'energy loss'.
Question 4 of 5
Which of the following statements about windshear is true?\n1. Windshear can subject your aircraft to sudden updraughts, downdraughts, or extreme horizontal wind components.\n2. Windshear will cause abrupt displacement from the flight path and require substantial control action to counteract it.\n3. Windshear only affects small single and twin engine aircraft. Large, modern, powerful, fast gas turbine engine powered aircraft will not suffer from the worst effects of a microburst.\n4. Microbursts are associated with cumulonimbus clouds.\n5. Windshear can strike suddenly and with devastating effect which has been beyond the recovery powers of experienced pilots flying modern and powerful aircraft.
Question 5 of 5
What is the expected duration of an individual microburst?
12 more questions in this chapter
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