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

Directions: The following problem has a question and two statements labelled (1) and (2). You have to decide whether the statements are sufficient to answer the question. Mark your answer as

A plane flies over New Delhi. What is its speed in km per hour?

(1) The plane is flying in a circle. (2) The plane is flying at the speed of 1/9 km per second.

  1. if you can get the answer from (1) alone, but not from (2) alone

  2. if you can get the answer from (2) alone, but not from (1) alone

  3. if you can get the answer from (1) and (2) together, although neither statement by itself suffices

  4. if (1) alone suffices and (2) alone suffices

  5. if you cannot get the answer from (1) and (2) together, and need even more data

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In statement (1), no information is given regarding the speed of the plane. From statement (2), it is given that in 1 second, the plane covers = 1/9 km. So, in 3600 seconds, the plane covers = 400 km. This implies that the speed of the plane is 400 km/hr. So, the correct option is (2).

Multiple choice properties of magnet magnetism physics neutral points magnetic poles and magnetic compass magnetic field

An aeroplane, in which the distance between the tips of the wings is $50 m$, is flying horizontally with a speed of $360$ km/hour, over a place where the vertical component of earth's magnetic field is $2.0 \times 10^{-4} \ tesla$ . The potential difference between the tips of the wings would be

  1. $0.1 V$
  2. $0.5 V$
  3. $0.2 V$
  4. $1.0 V$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The induced EMF across the wings is e = B * v * l. Speed v = 360 km/h = 100 m/s. B = 2.0 * 10^-4 T. l = 50 m. e = (2.0 * 10^-4) * 100 * 50 = 1.0 V.

Multiple choice maths compound measures and motion kinetic graphs time - calcuation of distance travel graphs

Fighter planes  $X$  and  $Y$  are moving towards a target $ 'O'$ along two perpendicular paths, with equal speeds.  $X$  starts from a point at a distance of  $19\mathrm { km }$  from  $^ { \prime } O ^ { \prime }$  and  $Y$  starts from a point at a distance of   $12\mathrm { km }$  from  $ \mathrm '{ O } '.$  After  $1$  minute, it was found that they were  $13\mathrm { km }$  away from each other. What is the speed at which they are travelling. given that they start simultaneously?

  1. $35 \mathrm { km } / \mathrm { min }$
  2. $28 \mathrm { km } / \mathrm { min }$
  3. $7 \mathrm { km } / \mathrm { min }$
  4. $21 \mathrm { km } / \mathrm { min }$
Reveal answer Fill a bubble to check yourself
B Correct answer
Multiple choice physics dynamics - explaining motion air resistance fluid friction moving through fluids

What measures are taken to reduce fluid friction in aeroplanes?

  1. Optimum speed is maintained with respect to the air

  2. Metals are choosen in a way to make the aeroplane lighter with smoother surface

  3. Streamlined body inspired by birds

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is very important to minimize fluid friction for aeroplanes because more friction for aeroplanes may produce more heat, which may harm the plane. Thus, various measures are taken to reduce friction. An optimum speed is maintained and the body structure of the plane is more streamlined so that it can cut through air with minimum friction. Also, such metals are chosen which are light but strong and also make for smooth surface.

Multiple choice physics behaviour of perfect gas and kinetic theory of gases mean free path law of equipartition of energy and mean free path behavior of perfect gas and kinetic theory

Ten small planes are flying at a speed of $150$km $h^{-1}$ in total darkness in an air space that is $20\times 20\times 1.5km^3$ in volume. You are in one of the planes, flying at random within this space with no way of knowing where the other planes are. On the average about how long a time will elapse between near collision with your plane. Assume for this rough computation that a safety region around the plane can be approximated by a sphere of radius $10$m.

  1. $125$h
  2. $220$h
  3. $432$h
  4. $225$h
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Here, $v=150$km $h^{-1}$
$N=10$
$V=20\times 20\times 1.5$ $km^3$
Diameter of plane, $d=2R=2\times 10$
$=20m=20\times 10^{-3}$km
$n=\dfrac{N}{V}=\dfrac{10}{20\times 20\times 1.5}=0.0167km^{-3}$
Mean free path of a plane
$\lambda =\dfrac{1}{\sqrt{2}\pi d^2n}$
Time elapse before collision of two planes randomly,
$t=\dfrac{\lambda}{v}=\dfrac{1}{\sqrt{2}\pi d^2nv}$
$=\dfrac{1}{1.414\times 3.14\times (20)^2\times 10^{-6}\times (0.0167)\times (150)}$
$=\dfrac{10^6}{4449.5}=224.74$h $=225$h
Multiple choice physics upthrust in fluids, archimedes' principle and floatation density of a fluid density of fluid density and relative density

Air streams horizontally past an air plane. The speed over the top surface is 60 m/s and that under the bottom surface is 45 m/s.The density of air is $1.293\;kg/{m^3}$, then the difference in pressure is.

  1. 1018 $N/{m^2}$
  2. 516 $N/{m^2}$
  3. 1140 $N/{m^2}$
  4. 2250 $N/{m^2}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$\begin{array}{l} \dfrac { { { V^{ 2 } } } }{ 2 } +gh+\dfrac { p }{ d } ={ { constant } } \ d=density \ R=pressure \ \dfrac { { V _{ t }^{ 2 } } }{ 2 } +\dfrac { { { P _{ t } } } }{ d } =\dfrac { { V _{ B }^{ 2 } } }{ 2 } +\frac { { { P _{ B } } } }{ d }  \ { P _{ B } }-{ P _{ t } }=\dfrac { d }{ 2 } \left( { V _{ t }^{ 2 }-V _{ B }^{ 2 } } \right) =1018\, \, N/{ M^{ 2 } } \ where\, \, { V _{ t } }+{ V _{ B } }=speeds\, \, over\, \, top\, \, and\, \, bottom \ K.\in =\frac { 1 }{ 2 } \times 100\times { \left( { 11150 } \right) ^{ 2 } }m/s \ =6.2\times { 10^{ 9 } }\, \, joules \ \in scope\, \, velocity=11.15\, \, KM/s=11150\, \, m/s \end{array}$

Multiple choice geography the earth and the graticule general idea about earth space around the earth is the earth round?

An aeroplane takes off from 30 North Lat., 50 East long., and lands at the opposite end of the earth. Where does it land?

  1. 30 North Lat., 50 West long.

  2. 30 south Lat., 50 West long.

  3. 50 North Lat., 30 West long.

  4. 30 south Lat., 130 West long.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This airplane taking off from N30 E50 would have to be a seaplane or floatplane. That location is in the Persian Gulf off the coast of Iran. 

The opposite side on the globe would be S30 (the other side of the equator) and W130 or south of the Pitcairn Islands in the South Pacific.

Multiple choice biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

During the takeoff of an aeroplane there is a _____________pressure on the top and a _____ pressure below.

  1. Low, low

  2. Low, high

  3. High, high

  4. High, low
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Because of the curved upper surface of the aeroplane more air flows in the same time as compared to the lower surface. Therefore, the pressure over the aeroplane is less when compared to the lower surface.

So, the answer is low , High

Multiple choice physics propagation of sound waves longitudinal vs transverse wave sound and light comparison of speed of sound with speed of light

An aeroplane travelling at the speed of sound will have a velocity of:

  1. 1000 km/hr

  2. 1180 km/hr

  3. 1540 k/hr

  4. 1620 k/hr
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed of sound in air is , $v=330m/s=330\times18/5=1188km/hr$ , as stated that aeroplane is travelling with the velocity of sound therefore its velocity is $1188km/hr$ .