CELL AND BATTERIES - Practice Mode

1) Why the vent plug is kept open during charging of a battery?

To escape the gas freely To allow oxygen enter inside To check the level of electrolyte To check the colour changes in the plates

Correct Answer: To escape the gas freely

2) In which method the battery is charged at low current for long period?

Rectifier method Trickle charging method Constant current method Constant potential method

Correct Answer: Trickle charging method

3) How the hard sulphation defect in lead acid battery can be rectified?

Changing with new electrolyte Replacing with new electrodes Recharging the battery for a longer period at low current Recharging the battery for short period at high current

Correct Answer: Recharging the battery for a longer period at low current

4) Which material is used as cathode (-ve) electrode in silver oxide battery?

Zinc Copper Carbon Silver oxide

Correct Answer: Zinc

5) What is the Electro Chemical Equivalent (ECE) of silver?

0.001182 mg/coulomb 0.01182 mg/coulomb 0.1182 mg/coulomb 1.1182 mg/coulomb

Correct Answer: 1.1182 mg/coulomb

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