Why an aeroplane cannot fly In vacuum ?
Because pilot and passengers will die for lack of oxygen.
Acroplane can fly in vacuum.
Because the propeller will not work and also there will be nothing to support its weight.
None of these.
Why cream separates out when milk is churned ?
Because cream particles are lighter than milk particles.
Because cream particles are heavier than milk particles -
Because the force of adhesion between the molecules of cream and milk is very weak.
Because of none of these reasons.
What is the shape ofwater meniscus in a glass capillary tube ?
It is convex.
It is concave.
It is plane.
It is irregular.
Why wet clothes dry more quickly on a warin day than on a cold day ?
Because wind blows faster on warm days.
Because humidity is less on warm days.
Because high temperature of air fastens' evaporation.
ecause clothes expand on warm days. Thus more surface area is exposed.
A lump of ice floaft In a vessel of ice-cold water. How the level of water will be affected when ice melts completely?
The level will fall.
The level will rise.
The level will remain unchanged.
None of these.
Why does a cheap clock lose time in summer ?
1ecause the pendulum gains length in summer.
Because the pendulum loses length in summer.
Because days are longer in summer.
Because the dial of the clock expands in summer.
Why water pipes are in danger of bursting in extremely cold weather ?
Because water pipes contract in extremely cold weather.
Because water freezes and hence expands.
Because water exerts greater pressure at lower temperatures.
Because short-range repulsive forces are produced between water' jand pipes.
Wny cooking more difficult on the mountains?
Because pressure is low at higher altitudes. Low pressutd lowers the boiling point. Therefore cooking takes longer on the mountains.
Because fuel for cooking is not easily available on the mountains.
Because it is cold on the mountains.
Because there is snowfall on mountains.
Which of the two is more elastic, rubber or steel ?
Rubber is more elastic than steel.
Steel is more elastic than rubber.
Both are equally elastic.
Only the rubber is elastic. Steel is a plastic body.
Why water cannot put out fire of petrol burning in a container
Because petrol has a property of absorbing oxygen from water.
Because petrol is lighter than water.
Because petrol. is heavier than water.
Because petrol is highly inflammable.
1. World Geography -Test-01
2. World Geography -Test-02
3. World Geography -Test-03
4. Geography of India -Test-01
5. Geography of India -Test-02
6. Geography of India -Test-03
7. Geography of India -Test-04
8. Geography of India -Test-05
9. History of India - Test - 01
10. History of India - Test - 02
11. History of India - Test - 03
12. History of India - Test - 04
13. History of India - Test - 05
14. History of India - Test - 06
15. History of India - Test - 07
Eating Secrets to Help You Lose Weight
Unstable Countries In The World
Global Dial Code
Untouched Corners Of The Earth
Pregnancy Health Care
Handmade Valentines Day Cards