DGCA Performance: Cruise & En-Route Questions
197 exam-style Cruise & En-Route 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
On a reciprocating engined aeroplane, with increasing altitude at constant gross mass, constant angle of attack and configuration, the power required:
- Aremains unchanged but the TAS increases
- Bincreases and the TAS increases by the same percentage
- Cincreases but TAS remains constant
- Ddecreases slightly because of the lower air density
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Correct answer: B. increases and the TAS increases by the same percentage
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- Q2
Moving the centre of gravity from the forward to the aft limit: (gross mass, altitude and airspeed remain unchanged)
- Aincreases the power required
- Baffects neither drag nor power required
- Cincreases the induced drag
- Ddecreases slightly because of the lower air density
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Correct answer: D. decreases slightly because of the lower air density
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- Q3
For jet-engined aeroplanes operating below the optimum altitude, what is the effect of increased altitude on specific range?
- AIt does not change
- BIncreases only if there is no wind
- CIncreases
- DDecreases
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Correct answer: C. Increases
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- Q4
If the thrust available exceeds the thrust required for level flight:
- Athe aeroplane accelerates if the altitude is maintained
- Bthe aeroplane descends if the airspeed is maintained
- Cthe aeroplane decelerates if it is in the region of reversed command
- Dthe aeroplane decelerates if the altitude is maintained
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Correct answer: A. the aeroplane accelerates if the altitude is maintained
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- Q5
Given a jet aircraft. Which order of speeds is correct?
- AVs, Maximum range speed, Vx
- BMaximum endurance speed, Maximum range speed, VX
- CVs, Vx Maximum range speed
- DMaximum endurance speed, Long range speed, Maximum range speed
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Correct answer: C. Vs, Vx Maximum range speed
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- Q6
Referring to Fig. 4.24. Why does the curve for an equivalent weight of 35 000 kg, only start 4 mins after engine failure?
- AAll the curves start at the same point higher up
- BAt that altitude the engine takes longer to spool down after failure.
- CAt that weight the aircraft has a higher TAS and therefore more momentum
- DAt that weight the aircraft takes longer to slowdown to the optimum drift down speed.
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Correct answer: D. At that weight the aircraft takes longer to slowdown to the optimum drift down speed.
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- Q7
The pilot of a light twin engine aircraft has calculated a 4,000 m service ceiling with a take-off mass 3,250 kg, based on the general forecast conditions for the flight. If the take-off mass is 3,000 kg the service ceiling will be:
- Aless than 4,000 m
- Bunchanged, equal to 4,000 m
- Conly a new performance analysis will determine if the service ceiling is higher or lower than 4,000 m
- Dhigher than 4,000 m
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Correct answer: D. higher than 4,000 m
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- Q8
Consider the graphic representation of the power required for a jet aeroplane versus true air speed (TAS). When drawing the tangent out of the origin, the point of contact determines the speed of:
- Acritical angle of attack
- Bmaximum endurance
- Cminimum power
- Dmaximum specific range
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Correct answer: B. maximum endurance
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- Q9
In the drag versus speed curve for a jet aeroplane, the speed for maximum range corresponds with:
- Athe point of contact of the tangent from the origin to the drag curve
- Bthe point of intersection of the parasite drag curve and the induced drag curve
- Cthe point of contact of the tangent from the origin to the parasite drag curve
- Dthe point of contact of the tangent from the origin to the induced drag curve
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Correct answer: A. the point of contact of the tangent from the origin to the drag curve
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- Q10
If the C of G moves aft from the most forward position:
- AThe range and the fuel consumption will increase.
- BThe range and the fuel consumption will decrease.
- CThe range will increase and the fuel consumption will decrease
- DThe range will decrease and the fuel consumption will increase.
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Correct answer: C. The range will increase and the fuel consumption will decrease
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- Q11
The speed VS is defined as the:
- Aspeed for best specific range
- Bstalling speed or minimum steady flight speed at which the aeroplane is controllable
- Csafety speed for take-off in case of a contaminated runway
- Ddesign stress speed
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Correct answer: B. stalling speed or minimum steady flight speed at which the aeroplane is controllable
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- Q12
What is the effect of a head wind component, compared to still air, on the maximum range speed for maximum climb angle respectively?
- AMaximum range speed decreases and maximum climb angle speed decreases
- BMaximum range speed increases and maximum climb angle speed increases
- CMaximum range speed increases and maximum climb angle speed stays constant
- Dmaximum range speed decreases and maximum climb angle speed increases
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Correct answer: C. Maximum range speed increases and maximum climb angle speed stays constant
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