RRB-GROUP D EXAM 2021|GENERAL SCIENCE QUESTIONS

 


1 ‘ The production of tears when dust particles  hit the human eye ‘ is an example of which of the following ?

1) Respiration          

2) Immunity                 

3) Excrection                   

4) Differentiation

2. ‘The generation of electricity by flow of water through dams ‘ is an example of which of the following ?

1) Law of conservation of momentum            

2) Kepler’s law

3) Archimedes Principle                           

4) Law of conservation of energy

3. Which of the following is NOT an example of gravity ?

1) Revolution of planets around the sun

2) A rock rolling down a hill

3) Writing with a pencil

4) Formation of tides in the ocean

4. Which of the following principles is used in  the system of rader , that is being used by t raffic police  to check over speeding vehicles ?

1) Electromagnetic

2) Law of reflection       

3) Doppler effect

4) Bemoulli’s principle

5. Which of the following acids is are present in lemons ?

(i) Citric acid              (ii) Tartaric acid             (iii) Malic acid

1) Only (i)                 

2) Only (i) and (ii)  

3) only (i) and (iii)

4) (i), (ii), and(iii)

6.  Which of the following is an example of a Maillard reaction ?

1) Burning of eyes while cutting onions 

2) Hardening  of egg when heated

3) Browning of bread in to toast               

4) Formation of curd  from milk

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