General Science Question Answers For Rail NTPC/Group D/SSC/WBPSC | Set - 02

 

General Science Question Answers For Rail NTPC/Group D/SSC/WBPSC | Set - 02 

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                          Welcome to www.jobguidee.com. Today we are providing some important General Science Questions Answers set -02 for Upcoming exams like Railway NTPC/Group D/PSC/SSC and many more. These questions are based on previous year and many important topic.So just go down and read those questions, You can note down also : 

1) What is the rate of vapourisation in case of high amount of water vapour in air ?

Ans : Vapourisation decreases

2) When the boiling point of liquid increases ?

Ans : with the increase of pressure

3) The displacement of a substance in unit, is known as ?

Ans : velocity

4) What is the unit of force in CGS system ?

Ans : Dyne

5) What is the colour of sky to a astronaut ?

Ans : Black

6) What is used by a radar ?

Ans : Radio-Wave

7) What is anaroid barometer ?

Ans : The barometer where liquid is not used 

8) What is a light year ?

Ans : The distance traversed by light in one year

9) What is the friction of flowing liquid ?

Ans : Viscosity

10) What type of glass is used in the headlight of Cars ?

Ans : Concavo-Convex lens

11) Which metal is used to make the filament of electric bulb ?

Ans : Tungsten

12) In which layer of air the ultra-violet ray which is scattered from sun is absorbed ?

Ans : Ozonosphere

13) Which gas is used in flying ballon ?

Ans : Hydrogen/Helium

14) What is the speed of light in vaccum ?

Ans : 3× 10^10 cm/s

15) IC Chips of computer is constituted by ?

Ans : Silicon (Si)

16) Why bat can fly even in dark ?

Ans : With the help of ultrasonic wave

17) In which state gas is in cooking gas cyllinder ?

Ans : liquid

18) What  is the chemical name of the washing soda ?

Ans : Sodium Carbonate (Na2CO3)

19) Which mixture of gas used for welding ?

Ans : Oxygen & Acytelene

20) Brass is the mixture of ?

Ans : Cu + Zn ( Copper + Zinc)

21) Why it is difficult to cook at the top of the mountain ?

Ans : Atmosphere pressure is low

22) Why two pieces of ice become one when pressed ?

Ans : Low melting point at the contact point

23) Why the dress of traffic police is white ?

Ans : The white clothes do not absorb sunlight much

24) What is the amount of Gold in 18 carate gold ?

Ans : 75%

25) Why microphone is used ?

Ans : To convert sound energy to electrical energy

26) What is the acceleration of free falling bodies of different masses ?

Ans : Equal

27) Why amount of dew is low in time of cloudy night ?

Ans : The radiation of heat is very slow in cloudy night

28) What is measured by spring balance ?

Ans : Weight of the object

29) In Dynamo mechanical energy converts into ?

Ans : Electric energy

30) Which device is utilised most in modern communication system ?

Ans : Optical Fibre

31) Who discovered natural radio activity ?

Ans : Henry Beckerell

32) How many time is required to light to come from sun to earth ?

Ans : 8 min 18 sec

33) Which is the brightest star in the sky ?

Ans : Cirrus

34) What is the magnetic strength at the middle of a bar margnet ?

Ans : Nil

35) What type of reaction occur in the sun ?

Ans : Nuclear Fusion

36) What is the source of electric energy of artificial Satellite ?

Ans : Solar Cell

37) What substance causes maximum pollution in air ?

Ans : Carbon Monooxide

38) Why a football jump immediately after falling on floor ?

Ans : It is very light and can easily overcome the obstacles made by air

39) The fish remain alive,even after the water of pond become freeze, why ?

Ans : The water under the ice remain unfrozen

40) Why a sky appears black to a astronaut ?

Ans : Due to lack of dust particle, no reflection of light

41) Why Hydrometer is used ?

Ans : To determine relative density of liquid 

42) In the E= mc^2 , What 'c' stands for ?

Ans : Speed of light

43) Why a falling rain drop is sperical in shape ?

Ans : Due to surface tension

44) What will be happened if ultraviolet ray falls on certain metal ?

Ans : The emission of electron

45) Why the sound of lightning is heared,after it is seen ?

Ans : The speed of light is more than that of sound

46) What is approximate weight of a body in a moon if his weight in Kolkata is 42 kg ?

Ans : 7 kg

47) Why a Athletic run some distance before Jumping ?

Ans : To accquire inertia of motion

48) Which law states - 'At a constant temperature, the volume of a certain amount of gas is indirectly proportional to its pressure ?

Ans : Boyel's law

49) If the time period of a simple pendulum of length 1 metre is 1 seconds,then what will be time period when the length is 4 metre ?

Ans : 2 Secs

50) What type of reflector is used in a periscope of a submarine ?

Ans : Total Reflecting Prism

51) What type of glass is used as a looking glass in a car ?

Ans : Convex mirror

52) What type of glass is used aa the shaving mirror ?

Ans : Concave mirror

53) What type of mirror of the headlight of car use ?

Ans : Hyperbolic Mirror

54) At same temperature, why Puri is seemed hotter than Delhi ?

Ans : As Puri is situated beside sea,so relative humidity in Puri is greater than Delhi

55) In which direction Rainbow appears after a short spell of shower ?

Ans : At the opposite side of the sun

56) Which is used as lubricant in heavy machine ?

Ans : Graphite dust

57) What is the reason of the start travelling from East to West ?

Ans : Beacuse earth rotates from West to East

58) What is the principle of pressure cooker ?

Ans : Boiling point is increased with the increase of pressure

59) Why lightning cinductor is used in the tall buildings ?

Ans : Neutralise the change of the cloud

60) Which is measured by the apparatus named technometer ?

Ans : The speed of Rotation