Electrolysis and storage of batteries MCQs with answers PDF for Electrical Engineering. Includes MCQs on electrostatics, electricity and magnetism, and electrolysis and storage of batteries. Electrical MCQs PDF available for test preparation.
Hydrogen evolved during charging produces explosive mixture when it is more than?
A. 2%
B. 8%
C. 6%
D. 13%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 themIn 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 currentThe output voltage of a silver oxide cell?
A. 1.3 V
B. 1.9 V
C. 1.2 V
D. 1.5 VBatteries are charged by?
A. engine generator sets
B. motor generator sets
C. rectifiers
D. any one of the above methodsElectrolyte for silver plating is?
A. dilute sulphuric acid
B. double cyanide of silver and potassium solution
C. potassium nitrate solution
D. any of the aboveIf 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 nilInternal 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 methodsOn 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 themThe internal resistance of a lead-acid cell is that of Edison cell _____ .
A. Equal to
B. Less than
C. More than
D. None