Hydrogen evolved during charging produces explosive mixture when it is more than?
A. 2%
B. 8%
C. 6%
D. 13%
Electrolysis and Storage of Batteries
Electrolysis and Storage of Batteries Mcqs
For cadmium plating electrolyte used is?
A. cadmium hexa metaphosphate
B. sodium cyanide, cadmium and caustic soda
C. cadmium sulphate and sulphuric acid
D. None of them
In a lead-acid battery, separators are provided to?
A. avoid internal short circuits
B. reduce tendency for polarisation
C. reduce internal resistance
D. facilitate flow of current
The output voltage of a silver oxide cell?
A. 1.3 V
B. 1.9 V
C. 1.2 V
D. 1.5 V
Batteries are charged by?
A. engine generator sets
B. motor generator sets
C. rectifiers
D. any one of the above methods
Electrolyte for silver plating is?
A. dilute sulphuric acid
B. double cyanide of silver and potassium solution
C. potassium nitrate solution
D. any of the above
If a battery is wrongly connected on charge following will happen:
A. Current drawing will be very small
B. Current drawing will be very high
C. Current delivered by the battery will be high
D. Current drawing will be nil
Internal resistance of a cell is reduced by _____ .
A. Increasing the plate area
B. Putting plates very close together
C. Using vent plug to permit gas formed during discharge
D. All above methods
On overcharging a battery _____ .
A. It will raise the specific gravity of the electrolyte
B. It will bring about chemical change in active materials
C. It will increase the capacity of the battery
D. None of them
The internal resistance of a lead-acid cell is that of Edison cell _____ .
A. Equal to
B. Less than
C. More than
D. None