Q.1.
Internal short circuits are caused by
Q.2.
The storage battery generally used in electric power station is
Q.3.
A dead storage battery can be revived by
Q.4.
Ampere hour capacity of an industrial battery is based on ____ hours discharge rate.
Q.5.
Over charging
Q.6.
If a battery is wrongly connected on charge following will happen
Q.7.
A constant-voltage generator has
Q.8.
The charge required to liberate one gram equivalent of any substance is known as ______ constant
Q.9.
Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as______materials.
Q.10.
Cells are connected in series in order to
Q.11.
Which of the following is incorrect?
Q.12.
Weston standard cell at 20°C has voltage of ____ volts.
Q.13.
In constant voltage charging method, the charging current from discharged to fully charged condition
Q.14.
In constant-current charging method, the supply voltage from discharged to fully charged condition
Q.15.
In a lead-acid cell, lead is called as
Q.16.
The common impurity in the electrolyte of lead-acid battery is
Q.17.
A battery of 6 cells will show a drop of _____ volts from fully charged state to fully discharged state.
Q.18.
The substances which combine together to store electrical energy during the charge are called ______ materials
Q.19.
If a lead-acid cell is discharged below 1.8 V the following will happen.
Q.20.
Sulphated cells are indicated by
Q.21.
The body of Edison cell is made of
Q.22.
The active materials of a nickel-iron battery are
Q.23.
Which of the following primary cells has the highest voltage ?
Q.24.
Petroleum jelly is applied to the electrical connections to the lead-acid battery
Q.25.
Following will occur if level of electrolyte falls below plates
Q.26.
The capacity of a lead-acid cell does not depend on its
Q.27.
Cells are connected in parallel to
Q.28.
On the average the ampere-hour efficiency of an Edison cell is about
Q.29.
The lead-acid cell should never be discharged beyond
Q.30.
In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3