DGCA Performance: Climb & Descent Questions
292 exam-style Climb & Descent 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
What happens to the drag of a jet aeroplane if, during the initial climb after takeoff, a constant IAS and constant configuration is maintained? (Assume a constant mass..
- AThe drag decreases
- BThe drag increases initially and decrease thereafter
- CThe drag remains almost constant
- DThe drag increases considerably
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Correct answer: C. The drag remains almost constant
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- Q2
What happens to the speed for Vx and Vy with increasing altitude?
- ABoth remain constant
- BVx remains constant and Vy increases.
- CVx increases and Vy remains constant.
- DVx remains constant and Vy decreases.
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Correct answer: D. Vx remains constant and Vy decreases.
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- Q3
Two identical aeroplanes at different masses are descending at idle thrust. Which of the following statements correctly describes their descent characteristics?
- AAt a given angle of attack, both the vertical and the forward speed are greater for the heavier aeroplane.
- BThere is no difference between the descent characteristics of the two aeroplanes.
- CAt a given angle of attack the heavier aeroplane will always glide further than the lighter aeroplane.
- DAt a given angle of attack the lighter aeroplane will always glide further than the heavier aeroplane.
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Correct answer: A. At a given angle of attack, both the vertical and the forward speed are greater for the heavier aeroplane.
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- Q4
The speed for best rate of climb is called?
- AVO
- BVY
- CVX
- DV2
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Correct answer: B. VY
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- Q5
In a steady descending flight equilibrium of forces acting on the aeroplane is given by: (T=Thrust, D = Drag, W=Weight, descent angle = GAMMA)
- AT+D=-W sin GAMMA
- BT+W sin GAMMA = D
- CT - W sin GAMMA = D
- DT -D =W sin GAMMA
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Correct answer: B. T+W sin GAMMA = D
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- Q6
When comparing Vx to Vy:
- AVx will always be greater than Vy.
- BVy will always be greater than or equal to Vx.
- CVy will always be greater than Vx.
- DVx will sometimes be greater than Vy, but sometimes be less than Vy.
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Correct answer: B. Vy will always be greater than or equal to Vx.
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- Q7
An increase in atmospheric pressure has, among other things, the following consequences on take-off performance
- Aa reduced take-off distance and degraded initial climb performance
- Ba reduced take-off distance and improved initial climb performance
- Can increases take-off distance and degraded initial climb performance
- Dan increased take-off distance and improved initial climb performance
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Correct answer: B. a reduced take-off distance and improved initial climb performance
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- Q8
Which of the following combinations has an effect on the angle of decent in a glide? (Ignore compressibility effects).
- AConfiguration and mass.
- BConfiguration and angle of attack.
- CMass and altitude.
- DAltitude and configuration.
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Correct answer: B. Configuration and angle of attack.
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- Q9
A higher outside air temperature
- Adoes not have any noticeable effect on climb performance
- Breduces the angle of climb but increases the rate of climb
- Creduces the angle and the rate of climb
- Dincreases the angle of climb but decreases the rate of climb
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Correct answer: C. reduces the angle and the rate of climb
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- Q10
The take-off climb gradient:
- Aincreases in a head wind and decreases in a tail wind
- Bdecreases in a head wind and increases in a tail wind
- Cis independent of the wind component
- Dis determined with the aircraft in the take-off configuration
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Correct answer: C. is independent of the wind component
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- Q11
Which statement is correct for a descent without engine thrust at maximum lift to drag ratio speed?
- AThe mass of an aeroplane does not have any effect on the speed for descent
- BThe higher the gross mass the greater is the speed for descent
- CThe higher the gross mass the lower is the speed for descent.
- DThe higher the average tempwrature (OAT, the lower is the speed for descent.
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Correct answer: B. The higher the gross mass the greater is the speed for descent
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- Q12
The effect of changing altitude on the maximum rate of climb (ROC) and speed for best rate of climb for a turbo-jet aircraft, assuming everything else remains constant, is:
- Aas altitude increases the ROC and speed both decrease
- Bas altitude increases the ROC and speed both increase
- Cas altitude increases the ROC decreases but the speed remains constant
- Das altitude increases the ROC remains constant but the speed increases
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Correct answer: A. as altitude increases the ROC and speed both decrease
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