Quiz on Science - General Knowledge Questions with Answers | GK for SSC UPSC CDS NDA Railawys PSC Exams

Questions

46 Which of the following principles is associated with Optical fibre ?

A Scattering

B Interference

C Total internal reflection

D Refraction

Answer: Option [C]

47 Which type of coal produces the greatest energy ?

A Coal

B Anthracite

C Lignite

D Bituminous

Answer: Option [B]

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48 Ultra violet radiations of the Sun do not reach the earth because of the layer of :

A Ozone

B Carbon di-oxide

C Nitrogen

D Ammonia

Answer: Option [A]

49 Which metal is used for the manufacturing of heating elements used in electric iron ?

A Chromium

B Nichrome

C Lead

D Nickel

Answer: Option [B]

50 Which device is used to measure the speed of wind ?

A Altimeter

B Anemometer

C Calorimeter

D Chronometer

Answer: Option [B]

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