A. passive
B. active
C. redundant
D. inert
Related Mcqs:
- 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 - In constant voltage charging method, the charging current from discharged to fully charged condition_____________?
A. decreases
B. increases
C. remains constant
D. none of the above - Under normal charging rate, the charging current should be__________?
A. 10% of capacity
B. 20% of capacity
C. 30% of capacity
D. 40% of capacity - 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 - During the idle period of the battery, strong electrolyte tends to change the active material of the cell into____________?
A. Pb02
B. PbSC-4
C. PbO
D. Pb - The average charging voltage for alkali cell is about__________?
A. 1 V
B. 1.2 V
C. 1.7 V
D. 2.1 V - As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of___________?
A. reducing time of charging
B. increasing cell capacity
C. both (A) and (B)
D. avoiding excessive gassing - During charging the specific gravity of the electrolyte of a lead-acid battery
A. increases
B. decreases
C. remains the same
D. becomes zero - During the charging of a lead-acid cell__________?
A. its voltage increases
B. it gives out energy
C. its cathode becomes dark chocolate brown in colour
D. specific gravity of H2SO4 decreases - Hydrogen evolved during charging produces explosive mixture when it is more than___________?
A. 2%
B. 4%
C. 6%
D. 8%
