1. When a glass rod is placed in steam, its length increases but its width:
remains unchanged
decreases
increases
becomes irregular
2. Why does an iron nail float on mercury while it sinks in water?
Due to less chemical interaction of iron with mercury than it is with water.Due to less chemical interaction of iron with mercury than it is with water.
Iron is heavier than water and lighter than mercury.
Iron has greater density than water and lesser than mercury.
Mercury is heavier than water.
3. The number of images of an object placed between two parallel mirrors is:
Two
One
Six
Infinite
4. Oil spreads over the surface of water because:
Oil is more dense than water.
Oil is less dense than water
Oil has more surface tension than water.
Oil has less surface tension than water.
5. Telescope was invented by:
Gallileo
Gutenberg
Edison
Graham Bell
6. It is difficult to walk on ice than on road because:
Ice is harder than road.
Road is harder than ice.
Ice does not offer any reaction when we push it with our foot.
Ice has a lesser friction than road.
7. Television signals cannot be received beyond a certain distance because:
Signals are weak
Antenna is weak
Air absorbs its signals
The surface of the earth is curved.
8. Why do pendulum clocks usually lose time in Summer?
Due to longer days in summer.
Due to friction caused by coils.
Length of the pendulum increases, increasing the time period of unit oscillation.
The weight of the pendulum increases in summer.
9. Why does water boil at temperature below 100°C at higher altitudes?
The atmospheric pressure decreases and hence boiling point is lowered.
The gravitational attraction is less.
Because of heavy winds in mountains.
None of the above is correct.
10. Neutron was discovered by:
Chadwick
Rutherford
Bohr
Newton
11. Gas engine was invented by:
Diesel
Davy
Daimler
Charles
12. Relative humidity of atmosphere is measured by:
Hydrometer
Hygrometer
Potentiometer
Lactometer
13. When water is filled in a bottle and allowed to freeze, the bottle breaks because:
Water expands on freezing
Bottle contracts at freezing point
Temperature outside the bottle is more than inside
Water expands on heating
14. A man feels unpleasant due to humidity and heat. The reason for this is:
More sweating
Less sweating
Sweat does not evaporate due to humidity
Sweat is not formed due to humidity
15. Maximum temperature inside pressure cooker depends on:
Area of hole on the top and weight kept on it
Area of hole on the top and food being cooked
Weight kept on hole at top and food being cooked
Area of hole on the top only
16. A ball thrown outside from an artificial satellite revolving round the Earth will:
Go on the Sun
Go on the Moon
Fall on the Earth
Revolve round the Earth in the same orbit with the same time period as satellite
17. Pressure inside a soap bubble is:
More than atmospheric pressure
Less than atmospheric pressure
Equal to atmospheric pressure
Half to atmospheric pressure
18. Power of sunglass is:
0 Diopter
1 Diopter
2 Diopter
4 Diopter
19. Mirage is an example of:
Refraction
Total internal reflection
Dispersion
Diffraction
20. Red light is used for danger signals because it:
is scattered least
is soothing to eye
has least chemical effect
is absorbed least by air
12 Total Test
360 Total Question
Scientifically designed for PCS
A must have for Civil services aspirant
IAS PCS SCC and others
75 Total Test
2250 Total Question
Scientifically designed for PCS
A must have for Civil services aspirant
IAS PCS SCC and others
69 Total Test
2070 Total Question
Scientifically designed for PCS
A must have for Civil services aspirant
Timer for time management
