DGCA Performance: Power Curves Questions
200 exam-style Power Curves questions for the DGCA Performancepaper (CPL & ATPL). The first 12 are free below with answers and explanations — sign up free to practise all of them with progress tracking.
- Q1
If TAS is increased from 300 Kts to 400 Kts with no change in altitude, configuration, or weight, by what percentage will power required change?
- ADecrease by 1 35%.
- BDecrease by 35%.
- Clncrease by 135%.
- Dlncrease by 235%.
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Correct answer: C. lncrease by 135%.
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- Q2
What is curve A in the diagram at the right?
- Alnduced drag.
- BTotal drag.
- CProfile drag
- DForm drag
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Correct answer: A. lnduced drag.
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- Q3
What is the relationship between pewer required and TAS, as an aircraft accelerates above VMD?
- APower required increases in direct proportion to TAS.
- BPower required increases in inverse proportion to TAS.
- CPower required increases in proportion to (TAS)3.
- DPower required increases in proportion to (TAS)2.
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Correct answer: C. Power required increases in proportion to (TAS)3.
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- Q4
What is curve B in the diagram at the right?
- Alnduced drag.
- BTotal drag.
- CProfile drag
- DForm drag
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Correct answer: B. Total drag.
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- Q5
At what % of its stalling speed must a jet aircraft fly to achieve maximum endurance for a given fuel load?
- A122%.
- B132%.
- C142%.
- D152%.
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Correct answer: B. 132%.
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- Q6
What iscurve C in the diagram at the right?
- Alnduced drag.
- BTotal drag.
- CProfile drag.
- DForm drag
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Correct answer: C. Profile drag.
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- Q7
For a piston aircraft at constant weight, angle of attack, and configuration, what will be the effect of increasing altitude?
- Alncreased power and TAS will be required.
- Blncreased power will be required but at the same TAS.
- CLower power will be required at the same TAS.
- DThe same power will be required but at an increased TAS.
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Correct answer: A. lncreased power and TAS will be required.
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- Q8
What is point D in the diagram at the right?
- AMinimum induced power.
- BMinimum total drag.
- CMinimum profile drag
- DMinimum power required
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Correct answer: B. Minimum total drag.
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- Q9
The point where Drag coefficient/Lift coefficient is a minimum is
- Aat stalling speed (VS).
- Bthe lowest point of the drag curve
- Con the ""back side"" of the drag curve.
- Dthe point where a tangent from the origin touches the drag curve.
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Correct answer: D. the point where a tangent from the origin touches the drag curve.
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- Q10
For a piston aircraft at a constant altitude, angle of attack, and configuration, what will be the effect of increasing weight?
- AMore power will be required but at the same TAS.
- BMore power will be required but at a higher TAS.
- CThe same power will be required but at a higher TAS.
- DMore power will be required but at a lower TAS.
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Correct answer: B. More power will be required but at a higher TAS.
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- Q11
What is the airspeed at point D in the diagram?
- AV MDI.
- BV IMD.
- CV MDP.
- DV MP.
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Correct answer: B. V IMD.
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- Q12
The point at which a tangent out of the origin touches the power required curve
- Ais the point where Drag coefficient is a minimum.
- Bis the point where the Lift to Drag ratio is a maximum.
- Cis the maximum drag speed
- Dis the point where the Lift to Drag ratio is a minimum.
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Correct answer: B. is the point where the Lift to Drag ratio is a maximum.
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