Physics · Mathematics

Aviation and Flight Principles

300 Questions

Aviation and flight principles cover the physics of aircraft, including speed, altitude, lift, and takeoff requirements. These concepts frequently appear in physics and general science sections of various competitive exams. Use this collection to practice solving numerical and conceptual problems related to flight dynamics and aviation rules.

Aircraft takeoff speedFlight instrument rulesAverage speed calculationGlider and balloon altitudeEarth magnetic field effects

Aviation and Flight Principles Questions

Multiple choice maths mapping your way mapping mapping space around us bearing and drawings

A model of an aeroplane is made to a scale of $1:400$. Calculate the length, in cm, of the model; if the length of the aeroplane is $40$ m.

  1. $10$ cm
  2. $20$ cm
  3. $140$ cm

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scale $= k =$ $\dfrac{1}{400}$
Now, $\dfrac{\text{Length of model}}{\text{Length of aeroplane}} = k$
$\text{Length of model }= \dfrac{40 \times 100}{400}$
$\text{Length of model} =10$ cm

Multiple choice maths mapping your way mapping mapping space around us bearing and drawings

A model of an aeroplane is made to a scale of $1:400$. Calculate the length, in m, of the aeroplane, if the length of its model is $16$ cm.

  1. $68$ m
  2. $64$ m
  3. $54$ m

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Scale $= k =$ $\dfrac{1}{400}$
Now, $\dfrac{\text{Length of model}}{\text{Length of aeroplane}} = k$
$\text{Length of aeroplace} = 400 \times 16$
$\text{Length of model }= 6400$ cm
$\text{Length of model }= 64$ m

Multiple choice physics reflection of light in spherical mirrors sign convention for mirrors sign convention for spherical mirrors sign convention for the measurement of distances

Photographs of the ground are taken from an aircraft flying at an altitude of 2000 m by a camera with a lens of focal length 50 cm. The size of the film in the camera is $18 cm\times 18 cm.$ The area of the ground that can be photographed by the camera is:

  1. $720 m\times 720 m$
  2. $720 cm\times 720 cm$
  3. $360 cm\times 360 cm$

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$\dfrac {\text {Area of the image}}{\text {Area of the object}}=$ Aerial magnification $=m^2$
Where m is the linear magnification
$\therefore m=\dfrac {f}{f+u}=\dfrac {0.5}{0.5 - 2000} \approx -\dfrac {1}{4000}$
Now, area of the image is equal to size of the camera film, therefore
Area of object$=\dfrac {\text {Area of the image}}{m^2}$
$=18\times 18\times 4000\times 4000$
$=72000 cm\times 72000 cm$
Note that m has no unit, so area of object is in same units as area of image.

Multiple choice maths area and volume of cylinder hollow cylinder volume of cylinder volume of cylinder and cone

Mark the correct alternative of the following.
The altitude of a right circular cylinder is increased six times and the base area is decreased one-ninth of its value. The factor by which the lateral surface of the cylinder increases, is?

  1. $\dfrac{2}{3}$
  2. $\dfrac{1}{2}$
  3. $\dfrac{3}{2}$
  4. $2$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Curved surface area of cylinder $=2\pi r h$


Height is increased to $6$ times $=6h$


Base area is decreased to $\left(\dfrac{1}{9}th\right)$ 

i.e. $\pi (r{^{\prime}})^2=\dfrac{1}{9}\pi r^2\Rightarrow r^{\prime}=\dfrac13r $

Now,
New curved surface area $=2\pi\times\dfrac{1}{3}r\times 6h$

                                           $=2\times(2\pi r h)$
$\therefore$  Lateral surface area becomes twice.

Multiple choice physics energy and its forms idea of energy introduction to work and energy work and energy

A helicopter flying in the air has:

  1. only kinetic energy but not potential energy

  2. Only potential energy but not kinetic energy

  3. both potential and kinetic energy

  4. neither kinetic nor potential energy
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A flying helicopter has potential energy,mgh(mass by g by weight) and this potential energy does not depend in any way on how fast it is flying in a horizontal direction.

It also possesses kinetic energy at a constant velocity which is same at any height it flies.
The total energy is sum of both potential energy and kinetic energy.

Multiple choice physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

An aeroplane of mass is moving uniformly at a constant height under the action of two forces (i) upward force (lift) and (ii) downward force (weight). What is the net force on the aeroplane.

  1. Zero.

  2. mg

  3. only downward force

  4. only upward force
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If the net force is not zero the plane would be moving upward or downward. Since its height is constant the net force is 0

Multiple choice physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

A flying aeroplane has:

  1. only potential energy

  2. only kinetic energy

  3. both potential and kinetic energy

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An flying aeroplane required some work to be done against gravity to go upto that much height that work will be stored as potential energy of the body. Also aeroplane has some mass and moving with some velocity so has some kinetic energy also. 

So this poses both potential as well as kinetic energy.

Multiple choice physics pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

When a plane moves along the runway, the air above the wing speeds up more, So the pressure

  1. Lowers

  2. Increases

  3. Raises

  4. No Pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
According to Bernoulli's theorem        $ P + \rho gh+ \dfrac{1}{2}\rho v^2= constant$
$\implies$  When $v$ is increases, then pressure $(P)$ is lowers.
Multiple choice physics pressure in fluids and atmospheric pressure common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

A fully loaded Boeing aircraft has a mass of $33\times 10^{5}$ kg. Its total wing area is $500 m^2$. It is in level flight with a speed of $960 km/h$. (a) Estimate the pressure difference between the lower and upper surfaces of the wings. (b) Estimate the fractional increase in the speed of the air on the upper surface of the wing relative to the lower surface. The density of air is $\rho = 1.2 kg m^{-3}$ and $g = 9.81 m^{-2}$.

  1. $0.067$
  2. $0.075$
  3. $0.98$
  4. $0.88$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using Bernoulli's principle and the lift force equation (F = delta(P) * A), the pressure difference is calculated. Then, using the lift equation, the fractional speed increase is derived.

Multiple choice physics the essence of change different forms of energy energy conversions energy transformations and energy transfers

A helicopter takes off from the ground and rises vertically. It then hovers at a constant height
above the ground.
Which sequence of energy changes takes place during the gain in height?

  1. $Chemical \rightarrow gravitational\ potential\rightarrow kinetic$
  2. $Chemical \rightarrow kinetic \rightarrow gravitational\ potential$
  3. $Gravitational\ potential \rightarrow chemical \rightarrow kinetic$
  4. $Kinetic \rightarrow chemical \rightarrow gravitational\ potential$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

First the fuel in the engine gives chemical energy during burning. That chemical energy then converts to kinetic energy if the rotor of blades of the helicopter. Then kinetic energy converts in gravitational potential energy as it gains height.

Multiple choice physics wave motion wave velocity speed and acceleration of travelling wave speed of a travelling wave

A kite flying at a height h meter has r meter of string paid out at a time of t sec . If the kite moves horizontally with constant velocity v meter/sec then the at which the string is paid out is

  1. $\sqrt{\left ( r^2 h^2 \right )v}$ mt/sec
  2. $\dfrac{v\sqrt{\left ( r^2 h^2 \right )}}{r}$ mt/sec
  3. $\dfrac{r\sqrt{\left ( r^2 h^2 \right )}}{v}$ mt/sec
  4. $\dfrac{\sqrt{\left ( r^2 h^2 \right )}}{rv}$ mt/sec
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice maths calculations and mental strategies 1 equations from statements forming equations from statements writing mathematical statements

Two birds are flying in opposite directions over the edge of a circle-shaped forest of radius 4 km. Both start off from the same point simultaneously and both have to go to the same nest. Who reaches the nest first?
I. Speed of bird A is 60 km/hr and speed of bird B is 50 km/hr.
II. The nest is diametrically opposite to the starting point of the flight of the two birds, on the circumference of the forest.

  1. If the question can be answered by anyone of the statements alone, but cannot be answered by using the other statement alone.

  2. If the question can be answered by using either statement alone.

  3. If the question can be answered by using both the statements together, but cannot be answered by using either statement alone.

  4. If the question. cannot be answered even by using both the statements together.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the problem statement, the distance is given. 
In the first statement, the speeds are given.
In the second statement, nothing substantial can be concluded.
Since information on the paths of flight is not given, we can not determine which bird reaches first. D,

Multiple choice

For how long did Flyer III stay airborne during its most successful flight?

  1. 1 hour / flew 100 miles

  2. 39 minutes / flew 24 miles

  3. 15 minutes / flew 10 miles

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

On October 5, 1905, the Flyer III stayed airborne for 39 minutes and 23 seconds, covering a distance of approximately 24.5 miles. This was a significant improvement over their earlier flights.