In order that a hydrometer may float vertically in electrolyte its C.G. should be___________?

A. increases
B. decreases
C. remains same
D. none of the above

A. adding distilled water
B. adding so-called battery restorer
C. a dose of H2SO4
D. none of the above

A. one part H2O, three parts H2SO4
B. two parts H2O, two parts H2SO4
C. three parts H2O, one part H2SO4
D. all H2S04

A. decreases
B. increases
C. remains constant
D. none of the above

A. capacity of the cell is reduced
B. life of the cell is reduced
C. open plates are converted to lead sulphate
D. all above

A. 25 to 35%
B. 40 to 60%
C. 70 to 80%
D. 90 to 95%