BASICS – Air – DGCA Question Bank For Politics

#1. Newton's second laws states that .........?

F= MA.

F = MIA.

A = MF.

M= AF.

#2. The direction of static air pressure is ..... ?

Parallel to dynamic pressure.

Normal to dynamic pressure.

In all directions.

In no directions.

#3. Bernoulli's theorem states that.. .. ..?

Air is incompressible.

Total pressure is constant.

Air has viscosity.

Air does not expand.

#4. The SI units of mass and weight are .... and ......?.

Kilograms, Newtons.

Newtons, Kilograms.

Kilograms, Kilograms.

Newtons, Newtons.

#5. The SI units of density and velocity are .... and ..... ?

Kilograms per cubic centimetre, Centimetres per second.

Kilograms per cubic metre, Metres per second.

Newtons per cubic gram, Kilometres per minute.

Kilograms per cubic kilometre, Cubits per second.

#6. Bernoulli's theorem assumes that .......?.

Air is compressible.

Temperature changes.

Density changes.

Air is inviscid.

#7. Dynamic pressure acts .........?.

In all directions.

Downstream.

Upstream.

Upwards.

#8. A line midway between the-upper and lower surfaces of a wing is the.... ......?

Chord line.

Mean chord line.

Meail camber line.

Mean aerodynamic centre.

#9. An imbalance of moments about a point will cause ......?

Constant rate rotation.

Decreasing rate rotation.

Constant angular acceleration.

Spinning.

#10. The angle of attack is between the ...... ?

Flight path and chord line.

Fliglit path and longitudinal axis.

Relative airflow and longitudinal axis.

Relative airflow and chord line.

#11. The SI unit of density is ........a nd that of energy is ...... ?

Kg/min³, BTU.

Kg/m³, Therm.

Kg/m³, Joule.

N/m³ , Joule.

#12. The weight of a mass is calculated using the constant .......?

1N = 9.81 Kg.

1N = 1 Kg.

lN= 32Kg.

9.81N = 1 Kg.

#13. A Newton is ..............?

The force required to give a mass of 1 Kg an acceleration of 1 m/s².

The force required to give a mass of 1 Kg an acceleration of 9.81 m/s².

The mass requiring a force of 1 Kg for an acceleration of 9.81 m/s².

The mass requiring a force of 1 Kg for an acceleration of 1 m/s².

#14. A force of 1N applied to a mass of 1Kg it will cause an acceleration of ......... ?

9.81 m/s².

1 m/s².

32 m/s.

32 m/s².

#15. When flying below ISA MSL TAS will be ........ IAS?

The same as.

Higher than.

Twice.

Lower than.

#16. When flying at 40000 feet above ISA MSL TAS will be approximately ........ IAS?

Half.

Twice.

The same as.

Depends on load factor.

#17. A pressure of 100 kPa acting on a surface of 1 m² will exert a force of ... ?

100,000 N.

1 N.

1,000,000 N

10,000,000 Kg.

#18. The most efficient angle of attack of an aerofoil is ........?

About -4º

About 4º

About 15º

That which provides the best L:D ratio.

#19. The zero lift angle of attack of a symmetrical aerofoil is .....?

0°.

-4°.

4°.

15°.

#20. The zero lift angle of attack of an asymmetrical aerofoil is approximately.....?

0°.

-4°.

4°.

15°.

#21. Air density is increased by ........ ?

Increasing humidity.

Decreasing temperature.

Acceleration.

Acceleration or deceleration depending on velocity.

#22. Air viscosity is ...........

Its ability to flow

Its ability to expand and contract.

Its ability to resist acceleration.

Its resistance to flow.

#23. When subsonic airflow passes through a convergent duct its velocity ..... and its ' static pressure. .... .?

Increases, Increases.

Increases, Decreases.

Decreases, Remains constant.

Decreases, Decreases.

#24. When subsonic airflow passes through a convergent duct its temperature .......a nd its density ...... ?

Increases, Increases.

Increases, Decreases.

Decreases, Remains constant.

Decreases, Decreases.

#25. When supersonic airflow passes through a convergent duct its velocity .....i ts static pressure.. ... .?

Increases, Increases.

Increases, Decreases.

Decreases, Remains constant.

Decreases, Increases.

#26. Accelerating airflow first reaches sonic speed in a convergent duct at the ....... after which its velocity ..........?.

Centre, Increases.

Inlet, Decreases.

Throat, Remains constant.

Inlet or throat depending on temperature, Decreases.

#27. In order to accelerate supersonic airflow a ........d uct is required?

Convergent.

Parallel.

Convergent-divergent.

Divergent.

#28. Sonic airflow will not accelerate through a parallel duct because. ...........?.

It requires a convergent duct to accelerate.

It requires a divergent duct to accelerate.

Acceleration makes it supersonic after which it requires a divergent duct to accelerate.

It becomes supersonic then requires a convergent duct to accelerate.

#29. Acceleration of subsonic airflow through a convergent duct causes pressure and temperature to reduce because.. ..?

It is incompressible.

Its total pressure remains constant.

Its total energy remains constant so increasing kinetic energy is matched by decreasing static pressure and thermal energy.

It is compressible.

#30. When supersonic airflow passes through a convergent duct its temperature ..... and its density ..... ?

Increases, Increases.

Increases, Decreases.

Decreases, Remains constant.

Decreases, Decreases.

Dgca Question Bank For Pilots

Results

#1. Newton's second laws states that .........?

#2. The direction of static air pressure is ..... ?

#3. Bernoulli's theorem states that.. .. ..?

#4. The SI units of mass and weight are .... and ......?.

#5. The SI units of density and velocity are .... and ..... ?

#6. Bernoulli's theorem assumes that .......?.

#7. Dynamic pressure acts .........?.

#8. A line midway between the-upper and lower surfaces of a wing is the.... ......?

#9. An imbalance of moments about a point will cause ......?

#10. The angle of attack is between the ...... ?

#11. The SI unit of density is ........a nd that of energy is ...... ?

#12. The weight of a mass is calculated using the constant .......?

#13. A Newton is ..............?

#14. A force of 1N applied to a mass of 1Kg it will cause an acceleration of ......... ?

#15. When flying below ISA MSL TAS will be ........ IAS?

#16. When flying at 40000 feet above ISA MSL TAS will be approximately ........ IAS?

#17. A pressure of 100 kPa acting on a surface of 1 m² will exert a force of ... ?

#18. The most efficient angle of attack of an aerofoil is ........?

#19. The zero lift angle of attack of a symmetrical aerofoil is .....?

#20. The zero lift angle of attack of an asymmetrical aerofoil is approximately.....?

#21. Air density is increased by ........ ?

#22. Air viscosity is ...........

#23. When subsonic airflow passes through a convergent duct its velocity ..... and its ' static pressure. .... .?

#24. When subsonic airflow passes through a convergent duct its temperature .......a nd its density ...... ?

#25. When supersonic airflow passes through a convergent duct its velocity .....i ts static pressure.. ... .?

#26. Accelerating airflow first reaches sonic speed in a convergent duct at the ....... after which its velocity ..........?.

#27. In order to accelerate supersonic airflow a ........d uct is required?

#28. Sonic airflow will not accelerate through a parallel duct because. ...........?.

#29. Acceleration of subsonic airflow through a convergent duct causes pressure and temperature to reduce because.. ..?

#30. When supersonic airflow passes through a convergent duct its temperature ..... and its density ..... ?