The average charging voltage for alkali cell is about__________?

A. 1 v
B. 1.2 v
C. 1.7 v
D. 2.1 v

The watt-hour efficiency of a lead-acid cell varies between________?

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

Trickle charging of a storage battery helps to___________?

A. Maintain proper electrolyte level
B. Increase its reserve capacity
C. Prevent sulphation
D. Keep it fresh and fully charged

It is noticed that durum charging___________?

A. there is a rise in voltage
B. energy is absorbed by the cell
C. specific gravity of h2so4 is increased
D. the anode becomes chocolate brown in colour (pbcfe) and cathode becomes grey metallic lead (pb)

As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?

A. Compactness
B. Lower e.m.f.
C. Small quantity of electrolyte used
D. Higher internal resistance

In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following__________?

A. One part h2o, three parts h2so4
B. Two parts h2o, two parts h2so4
C. Three parts h2o, one part h2so4
D. All h2s04

It is noticed that during discharging the following does not happen___________?

A. Both anode and cathode become pbs04
B. Specific gravity of h2so4 decreases
C. Voltage of the cell decreases
D. The cell absorbs energy

Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials

A. Passive
B. Active
C. Redundant
D. Inert

During the charging and discharging of a nickel-iron cell____________?

A. Corrosive fumes are produced
B. Water is neither formed nor absorbed
C. Nickel hydroxide remains unsplit
D. Its e.m.f. remains constant

A dead storage battery can be revived by___________?

A. Adding distilled water
B. Adding so-called battery restorer
C. A dose of h2so4
D. None of the above