General Science Question Answers For Rail NTPC/Group D/SSC/WBPSC | Set - 03

 

General Science Question Answers For Rail NTPC/Group D/SSC/WBPSC | Set - 03 

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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 measured by Bolometer ?

Ans : Radiated Heat

2. What is the source of the brightest artificial light ?

Ans : Laser

3. What amount of heat is required to increase 1℃ temperature of 1 gm pure water is ?

Ans : 1 calorie

4. Why woollen clothes keep the body warm in winter ?

Ans : It prevent heat of the body from inside to come outside

5. Which portion of sun is visible in the time of total solar eclipse ?

Ans : Corona

6. What will be happened in absence of 'Green House' effect ?

Ans : The temperature of Earth will gradually decrease

7. Why metal is a good conductor of heat ?

Ans : Due to huge number of free electrons

8. At which temperature a man feel same when touches an iron and a wood ?

Ans : 98.4° F (temperature of the body)

9. What is black hole ?

Ans : A strong gravitational field

10. Which is measured by manometer ?

Ans : pressure of Gas

11. What is the diameter of an atom ?

Ans : 10^-14 m

12. Which is measured by the unit 'Nautical Mile' ?

Ans : Distance at the sea

13. If density = 5 gm/c.c ,Volume = 20 gm/c.c then what will be the mass of the body ?

Ans : 100 gram ( 5×20= 100)

21. How the dew point is measured ?

Ans : By the watee vapour present in air

22. What quantity of heat is required to convert 1 gm of ice of 0℃ to stream of 100℃ ?

Ans : 716 Cal (80+100+536)

23. Why fishplate is used in Rail line ?

Ans : It prevents line from bending even at high temperature

24. What is radio carbon dating ?

Ans : The process by which the age of fossil is determined 

25. Which instrument is used to convert from AC current to DC current ?

Ans : Rectifier

26. A man is running towards the mirror at a speed of 5 m/s. At what speed the image runs towards him ?

Ans : 10 m/s

27. Which particle acquired inteenational fame invented by a Bengali scientist ?

Ans : Boson

28. Why diamond is Shinning ?

Ans : For total internal reflection of light

29. Where 'Diode Valve' is used ?

Ans : Rectifier

30. What amount of electric energy is consumed if a light of 100w is switched on 6 hours daily for 30 days ?

Ans : 18 Kwh

31. At certain depth, the pressure of liquid depends on ?

Ans : Density

32. A dam is full of water, which type of energy is stored in water ?

Ans : Potential Energy

33. On which principle Tape Recorder acts ?

Ans : Ekectro Magnetic Induction

34. What amount of work is done to produce 10 calorie of heat ?

Ans : 42 Joule

35. Where is the non-ohmic conductor ?

Ans : Semi-Conductor

36. Where the gravitational force is minimum ?

Ans : Equator

37. Who is the inventor of universal gravutational law ?

Ans : Newton

38. What is the temperature of Photosphere of Sun ?

Ans : 6000 K

39. What ia the unit of the power of a lens ?

Ans : Dioptre

40. Which is the nearest Star of the earth ?

Ans : Alpha Centrauri

41. What is the SI unit of Pressure ?

Ans : Pascal

42. In what unit Nuclear sizes are expressed ?

Ans : fermi

43. In India which one of the following is responsible for the maintenance and improvement of physical standards of length and time ?

Ans : National Physical Laboratoryz New Delhi

44. What is Solar Day ?

Ans : Time between noons of two consecutive days 

45. Where angular measurement is applicable ?

Ans : Measuring the height of the mountain or distance of the planets

46. What is Kinematics ?

Ans : It is a part of a mechanics which deals with the description of motion, without involving force

47. What is Dynamics ?

Ans : It is the branch of mechanics which deals with the description of motion - in terms of force.

48. If a Sheet of paper is pulled out quickly from under a glass of watee without spilling the water, why ?

Ans : Due to inertia

49. If a body lowers his hand while catching the ball to save injury, why ?

Ans : To lessen the reaction due to Newton's third law

50. Why swimming becomes possible ?

Ans : Due to Newton's third law of motion

51. Inertia is the property of which physical quantity ?

Ans : Mass

52. One finds it more difficult to walk on ice than on concrete road, why ?

Ans : The friction between the ice and the feet is less than that between the concrete and the feet

53. It is easier to roll a barrel than to pull it , why ?

Ans : rolling friction is much less than sliding friction

54. A horse pulling a tonga moves forward. What reaction force exerted by him ?

Ans : The ground on the horse's feet

55. A bomb initially at rest, explodes into a large number of tiny fragments. What is the total momentum of all the fragments ?

Ans : Zero due to conservation of linear momentum