# GENERAL SCIENCE FOR SSC CGL AND RRB SET 16

General Science for SSC CGL and RRB exam. These Science questions are for the upcoming SSC CGL 2016 and RRB exam.

## GENERAL SCIENCE FOR SSC CGL AND RRB

1. A ball tied with a string to a rotating shaft revolves at uniform speed. As the shaft is suddenly brought to rest the string starts getting round the shaft with the angular velocity of the ball.
a)increasing
b)decreasing
c)remaining constant
d)becoming zero

2. If an apple is released from an orbiting spaceship, it will
a)fall towards the earth
b)move along with spaceship at the same speed
c)move at a higher speed
d)move at a lower speed

3. What happens when water is cooled from 8° C to 0° C?
a)Its volume decreases uniformly, becoming minimum at 0° C
b)Its density increases uniformly, attaining maximum value at 0° C
c)Its volume decreases upto 4° C and then increases
d)Its density decreases upto 4° C and then increases

4. During summer, we feel comfortable under a fan because it –
a)throws cool air on us
b)sets the air in motion, thereby increasing the evaporation of sweat
c)produces convection currents
d)produces air which carries heat away from the body

5. Light waves are different from sound waves in that
a)light waves are electromagnetic but sound waves are not
b)light waves can travel through water but sound waves cannot
c)light travels with the same speed in all media
d)light waves produce interference but sound waves do not

6. Planets are
a)luminous bodies which twinkle
b)non – luminous bodies which twinkle
c)luminous bodies which don’t twinkle
d)non – luminous bodies which don’t twinkle

7. In outer space a spaceman
a)cannot see stars during day time
b) cannot see stars at all
c) can see stars during day time opposite sun
d) can see stars during day time in all directions

8. The soap bubbles look coloured when viewed in white light due to
a)scattering of light by thin layer
b) interference of light by thin layer
c) trasmission of light
d) characteristics of the colours of soap – solution

9. Which of the following devices changes the electrical energy into mechanical energy?
a) Dynamo
b) Electric motor
c) Inductor
d) Rectifier

10. The function of a moderator in a nuclear reactor is to
a)moderate the number of secondary neutrons
b) moderate the velocity of secondary neutrons
c) increase the number of fissionable nuclei
d) control the fission reaction

11. The absolute zero of temperature is
a)the starting point of any scale of temperature
b) the lowest temperature that is theoretically possible
c) the temperature at which the vapours of all liquid substances freeze
d) the temperature at which all substances exists in the vapour phase

12. Heavy water
a)contains more dissolved air
b) contains more dissolved minerals and salts
c) contains deuterium in place of hydrogen
d) contains organic impurities

13. Animal charcoal is obtained by
a)the destructive distillation of bones
b) burning the bones of animals in contact with air
c) burning the flesh of animals
d) burning the bones of animals out of contact with air

14. Polythene is industrially prepared by the polymerisation of
a)Methane
b)Acetylene
c)Ethylene
d)Ethane

15. ‘Fixation of nitrogen’ implies
a)the liquefaction of nitrogen
b) the conversion of atmospheric nitrogen into useful compounds
c) the conversion of nitrogen into amines
d) the solidification of nitrogen gas of the atmosphere

16. Oxidation is a process which involves
a)the loss of electrons
b)the gain of hydrogen
c) the gain of electrons
d) no change in electrons

17. The bleaching agent of the colour of the clothes is
a)Sodium chloride
b) Sulphur dioxide
c) Carbon dioxide
d) Sulphur trioxide

18. What are potato ores?
a)Nodules on the sea bed containing a variety of minerals
b)Seed potato grown in Himachal Pradesh
c)Iron ore having a large concentration of Sulphur
d)Ores of nuclear minerals

19. Vaccination is invented by
a)Edward Jennar
b)Louis Pasteur
c)Wating
d)None of these

a)iron
b)copper
c)chromium
d)magnesium