Mechanics: MCQ Test (25 questions)

Question 1 of 25

Capillarity is not the sole reason for which one of the following?

Aink adsorption
Bgroundwater upwelling
CSpreading of a water drop on a cotton cloth
Dthe movement of water from a plant's roots to its foliage

Question 2 of 25

Two stones of different masses are dropped simultaneously from the top of a building.

Athe smaller stone reaches the ground first
BThe bigger stone reaches the ground first.
CBoth stones reach the ground at the same time.
DDepends on the composition of the stone

Question 3 of 25

At what angle should a cricket ball be hit so that it travels the maximum distance?

Aan angle of 60° with the horizontal
Ban angle of 45° to the horizontal
Can angle of 30° with the horizontal
Dan angle of 15° with the horizontal

Question 4 of 25

Consider the following statements about jet engines and rockets. 1. A jet engine uses ambient air for its oxygen supply. Therefore, it is unsuitable for space travel. 2. A rocket carries its oxygen supply in the form of gas and fuel. Which of the above statements is/are correct?

Aonly 1
Bonly 2
CBoth 1 and 2
DNeither 1 nor 2

Question 5 of 25

Why does the shape of a raindrop become spherical?

Aviscosity
BSurface tension
Celasticity
Dgravity

Question 6 of 25

When a ship moving in a river reaches the sea, the level of the ship-

Aas much as before
Bwill come up a little
Cwill come down a little
Dwill move up or down depending on the load it carries

Question 7 of 25

Why do pendulum clocks slow down in summer?

ABecause of the long summer days
Bdue to friction in the coil
CThe length of the pendulum increases, which increases the time taken for a single oscillation.
DThe weight of the pendulum increases in summer

Question 8 of 25

What is the SI unit of 'force'?

AKelvin
BNewton
CPascal
DVolt

Question 9 of 25

Which of the following does not have a unit of Newton meter?

AForce
Bkinetic energy
CWork
Denergy

Question 10 of 25

Why does a swimmer find it easier to swim in sea water than in river water?

AReduces pollution in sea water
BSea waves help a swimmer to float
CSea water has a higher density than ordinary water.
DThe ocean has a larger volume of water

Question 11 of 25

Which of the following is the SI unit of thermodynamic temperature?

AFahrenheit
BCelsius
Cradian
DKelvin

Question 12 of 25

Why can a person jump higher on the surface of the Moon than on the surface of the Earth?

AThe surface of the Moon is rough
Bthe moon has no atmosphere
CThe acceleration due to gravity on the Moon is less than on the Earth.
DThe moon is colder than the earth.

Question 13 of 25

If the horse suddenly starts moving, the rider is likely to fall because of-

Amoment of inertia
BLaw of conservation of mass
CRest inertia
Dthird law of motion

Question 14 of 25

body will remain at rest unless acted upon by an external force. Whose statement is this?

ANewton
BEinstein
CArchimedes
DGalileo

Question 15 of 25

Which of the following does not have kinetic energy?

Afired bullet
Brushing water
CMoving Hammer
Ddrawn bow

Question 16 of 25

Ampere is the unit of measurement of what?

Avoltage
Bcurrent
Cresistance
DPower

Question 17 of 25

Why is it more difficult to breathe in the mountains than on the plains?

AAs altitude increases, air pressure decreases and oxygen requirement increases.
BMountain air is heavy and cannot be filled into the lungs.
CMountain air is impure, so we cannot breathe it.
Dnone of the above

Question 18 of 25

The principle of cleaning surfaces with soap is based on-

Aon viscosity
Bon flotation
Con elasticity
Don surface tension

Question 19 of 25

The absorption of ink by blotting paper involves-

Aink viscosity
Bcapillary reaction phenomenon
Cdiffusion of ink through blotting
DSiphon action

Question 20 of 25

For a steel boat floating in a lake, what is the weight of the water displaced by the boat?

Aless than the boat's weight
Bmore than the weight of the boat
Cequal to the weight of that part of the boat which is below the surface of the lake water
Dequal to the weight of the boat

Question 21 of 25

Which of the following is most elastic?

Arubber
Bwet soil
CSteel
Dplastic

Question 22 of 25

There is no atmosphere on the Moon because-

AIt is near the Earth
Bit revolves around the sun
CIt gets light from the sun.
DHere the escape velocity of atoms is less than their root mean square velocity

Question 23 of 25

A stone tied to a string is rotated rapidly in a circle. If the string suddenly breaks while rotating, then-

AThe stone touches and flies linearly
BThe stone moves inwards radially
CThe stone moves radially outwards
DThe speed of the stone depends on its velocity.

Question 24 of 25

What is measured by cusec?

Apurity of water
Bdepth of water
Cflow of water
Damount of water

Question 25 of 25

The energy stored in the spring of a watch is-

Akinetic energy
Bpotential energy
Cheat energy
Dchemical energy