Electrolysis and storage batteries. Part – 2

11. Which of the following are the applications of D.C. system?

A. Battery charging work

B. Arc welding

C. Electrolytic and electrochemical processes

D. all of the above

12. In fuel cell, the _____ energy is converted into electrical energy

A. Mechanical

B. Chemical

C. Heat

D. Sound

13. Level of electrolyte in a cell should be ________ the level of plates

A. Below

B. Equal to

C. Above

D. None of the above

14. The current flow through electrolyte is due to the movement of

A. Ions

B. Holes

C. Electrons

D. None of the above

15. The body of Edison cell is made of

A. Bakelite

B. Rubber

C. Nickel plated steel

D. Aluminium

16. The active materials of a nickel-iron battery are-

A. Nickel hydroxide

B. powdered iron and its oxide

C. 21% solution of KOH

D. all of the above

17. When the lead-acid cell is fully charged, the electrolyte assumes_____ appearance

A. Dull

B. Reddish

C. Bright

D. Milky

18. Over charging

A. Produces excessive gassing

B. Loosens the active material

C. Increases the temperature resulting in buckling of plates

D. All the above

19. On overcharging a battery

A. It will bring about chemical changes in active material

B. It will increase the capacity of the battery

C. It will raise the specific gravity of the electrolyte

D. None of the above will occur

20. Persons preparing electrolyte should wear

A. Goggles or other face shield

B. Rubber

C. Rubber boots and gloves

D. All above safety devices