On a reciprocating engined aeroplane, with increasing altitude at constant gross mass, constant angle of attack and configuration, the power required:

increases and the TAS increases by the same percentage

remains unchanged but the TAS increases

increases but TAS remains constant

decreases slightly because of the lower air density

Moving the centre of gravity from the forward to the aft limit: (gross mass, altitude and airspeed remain unchanged)

decreases slightly because of the lower air density

affects neither drag nor power required

For jet-engined aeroplanes operating below the optimum altitude, what is the effect of increased altitude on specific range?

Increases only if there is no wind

If the thrust available exceeds the thrust required for level flight:

the aeroplane accelerates if the altitude is maintained

the aeroplane descends if the airspeed is maintained

the aeroplane decelerates if it is in the region of reversed command

the aeroplane decelerates if the altitude is maintained

Given a jet aircraft. Which order of speeds is correct?

Maximum endurance speed, Maximum range speed, VX

Maximum endurance speed, Long range speed, Maximum range speed

Referring to Fig. 4.24. Why does the curve for an equivalent weight of 35 000 kg, only start 4 mins after engine failure?

At that weight the aircraft takes longer to slowdown to the optimum drift down speed.

All the curves start at the same point higher up

At that altitude the engine takes longer to spool down after failure.

At that weight the aircraft has a higher TAS and therefore more momentum

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:

only a new performance analysis will determine if the service ceiling is higher or lower than 4,000 m

In the drag versus speed curve for a jet aeroplane, the speed for maximum range corresponds with:

the point of contact of the tangent from the origin to the drag curve

the point of intersection of the parasite drag curve and the induced drag curve

the point of contact of the tangent from the origin to the parasite drag curve

the point of contact of the tangent from the origin to the induced drag curve

If the C of G moves aft from the most forward position:

The range will increase and the fuel consumption will decrease

The range and the fuel consumption will increase.

The range and the fuel consumption will decrease.

The range will decrease and the fuel consumption will increase.

The speed VS is defined as the:

stalling speed or minimum steady flight speed at which the aeroplane is controllable

safety speed for take-off in case of a contaminated runway

What is the effect of a head wind component, compared to still air, on the maximum range speed for maximum climb angle respectively?

Maximum range speed increases and maximum climb angle speed stays constant

Maximum range speed decreases and maximum climb angle speed decreases

Maximum range speed increases and maximum climb angle speed increases

maximum range speed decreases and maximum climb angle speed increases

DGCA Performance: Cruise & En-Route Questions

197 exam-style Cruise & En-Route questions for the DGCA Performance paper (CPL · ATPL · PPL). 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:
- A remains unchanged but the TAS increases
- B increases and the TAS increases by the same percentage
- C increases but TAS remains constant
- D decreases slightly because of the lower air density
Show answer

Correct answer: B. increases and the TAS increases by the same percentage

This Explanation is Coming Soon
Q2
Moving the centre of gravity from the forward to the aft limit: (gross mass, altitude and airspeed remain unchanged)
- A increases the power required
- B affects neither drag nor power required
- C increases the induced drag
- D decreases slightly because of the lower air density
Show answer

Correct answer: D. decreases slightly because of the lower air density

This Explanation is Coming Soon
Q3
For jet-engined aeroplanes operating below the optimum altitude, what is the effect of increased altitude on specific range?
- A It does not change
- B Increases only if there is no wind
- C Increases
- D Decreases
Show answer

Correct answer: C. Increases

This Explanation is Coming Soon
Q4
If the thrust available exceeds the thrust required for level flight:
- A the aeroplane accelerates if the altitude is maintained
- B the aeroplane descends if the airspeed is maintained
- C the aeroplane decelerates if it is in the region of reversed command
- D the aeroplane decelerates if the altitude is maintained
Show answer

Correct answer: A. the aeroplane accelerates if the altitude is maintained

This Explanation is Coming Soon
Q5
Given a jet aircraft. Which order of speeds is correct?
- A Vs, Maximum range speed, Vx
- B Maximum endurance speed, Maximum range speed, VX
- C Vs, Vx Maximum range speed
- D Maximum endurance speed, Long range speed, Maximum range speed
Show answer

Correct answer: C. Vs, Vx Maximum range speed

This Explanation is Coming Soon
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?
- A All the curves start at the same point higher up
- B At that altitude the engine takes longer to spool down after failure.
- C At that weight the aircraft has a higher TAS and therefore more momentum
- D At that weight the aircraft takes longer to slowdown to the optimum drift down speed.
Show answer

Correct answer: D. At that weight the aircraft takes longer to slowdown to the optimum drift down speed.

This Explanation is Coming Soon
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:
- A less than 4,000 m
- B unchanged, equal to 4,000 m
- C only a new performance analysis will determine if the service ceiling is higher or lower than 4,000 m
- D higher than 4,000 m
Show answer

Correct answer: D. higher than 4,000 m

This Explanation is Coming Soon
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:
- A critical angle of attack
- B maximum endurance
- C minimum power
- D maximum specific range
Show answer

Correct answer: B. maximum endurance

This Explanation is Coming Soon
Q9
In the drag versus speed curve for a jet aeroplane, the speed for maximum range corresponds with:
- A the point of contact of the tangent from the origin to the drag curve
- B the point of intersection of the parasite drag curve and the induced drag curve
- C the point of contact of the tangent from the origin to the parasite drag curve
- D the point of contact of the tangent from the origin to the induced drag curve
Show answer

Correct answer: A. the point of contact of the tangent from the origin to the drag curve

This Explanation is Coming Soon
Q10
If the C of G moves aft from the most forward position:
- A The range and the fuel consumption will increase.
- B The range and the fuel consumption will decrease.
- C The range will increase and the fuel consumption will decrease
- D The range will decrease and the fuel consumption will increase.
Show answer

Correct answer: C. The range will increase and the fuel consumption will decrease

This Explanation is Coming Soon
Q11
The speed VS is defined as the:
- A speed for best specific range
- B stalling speed or minimum steady flight speed at which the aeroplane is controllable
- C safety speed for take-off in case of a contaminated runway
- D design stress speed
Show answer

Correct answer: B. stalling speed or minimum steady flight speed at which the aeroplane is controllable

This Explanation is Coming Soon
Q12
What is the effect of a head wind component, compared to still air, on the maximum range speed for maximum climb angle respectively?
- A Maximum range speed decreases and maximum climb angle speed decreases
- B Maximum range speed increases and maximum climb angle speed increases
- C Maximum range speed increases and maximum climb angle speed stays constant
- D maximum range speed decreases and maximum climb angle speed increases
Show answer

Correct answer: C. Maximum range speed increases and maximum climb angle speed stays constant

This Explanation is Coming Soon

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