Module 8 Set 1 AST

Question 1

The ISA value for air density is calculated by

Accepted Answer

Using ambient values of temperature and pressure applied to Boyle’s Law

Question 2

Steady state airflow around a cylindrical body becomes turbulent at the

Accepted Answer

Transition point at a velocity which is inversely proportion to the cylinder diameter

Question 3

Airflow velocities around a body may be calculated using

Accepted Answer

Static pressure in the combined gas law

Question 4

The result of ice forming on an aero plane wing in flight will be, increase in weight and

Accepted Answer

Drag coefficient and decrease in lift coefficient

Question 5

According to Lapse Rate theory, if sea level temperature is 10’C temperature

Accepted Answer

At 10000 ft will be minus 9.8’C

Question 6

Equivalent airspeed is calculated by multiplying calibrated airspeed by the ratio of

Accepted Answer

Ambient density to standard density

Question 7

On a conventional aero foil section, as angle of attack is increased, the

Accepted Answer

Transition point moves towards the trailing edge

Question 8

Total drag on an aero plane in flight is greater than the sum of lift dependent drag, skin friction and form drag because of

Accepted Answer

Mixing of airflows at joints

Question 9

To maintain the same altitude when velocity is increased

Accepted Answer

The angle of attack must be reduced to reduce lift coefficient

Question 10

The most efficient angle of attack for an aero foil may be obtained by referring to the

Accepted Answer

Graph of lift coefficient to angle of attack

Question 11

The total drag of a symmetrical aero foil at zero angle of attack is made up of

Accepted Answer

Form drag plus surface friction drag

Question 12

When a aircraft in straight and level flight suffers an engine failure, the transition to a stable glide is due to the

Accepted Answer

Action of the pilot

Question 13

In a stable climb, the rate of climb is proportional to the amount by which

Accepted Answer

Thrust exceeds drag

Question 14

When an aero plane is in a stable glide, if the pilot reduces the angle of attack, speed will

Accepted Answer

Increase and gliding distance will increase

Question 15

In a turn, if bank angle is increased, lift

Accepted Answer

Must be increased by increasing speed or angle of attack

Question 16

In a turn during which a force of 2G is produced, the aero plane's stalling speed will be the

Accepted Answer

Same as the basic stalling speed

Question 17

If two identical aero planes with a large difference in their weight are stalled

Accepted Answer

The heavier will have a higher stalling speed than the lighter

Question 18

The lift generated by a general-purpose aero foil would be ‘zero’ at

Accepted Answer

Zero degrees angle of attack

Question 19

Longitudinal dihedral is the angle between the

Accepted Answer

Mainplane dihedral and tailplane dihedral

Question 20

When an aero foil stalls, the movement of the center of pressure will cause the

Accepted Answer

Aero plane to rotate into a gliding attitude

Alle Karten