Search
.Management Sciences
Category: Electrolysis and Storage of Batteries
Which of the following cell has a. reversible chemical reaction ___________?
A. Lead-acid
B. Mercury oxide
C. Carbon-zinc
D. Silver-oxide
During charging the specific gravity of the electrolyte of a lead-acid battery
A. increases
B. decreases
C. remains the same
D. becomes zero
Internal short circuits are caused by___________?
A. breakdown of one or more separators
B. excess accumulation of sediment at the bottom of the cell
C. both (A) and (B)
D. none of the above
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
In ________ system the charging current is intermittently controlled at either a maximum or minimum value
A. two rate charge control
B. trickle charge
C. floating charge
D. an equalizing charge
Lead-acid cell has a life of nearly charges and discharges______________?
A. 500
B. 700
C. 1000
D. 1250
The best indication about the state of charge on a lead-acid battery is given by____________?
A. output voltage
B. temperature of electrolyte
C. specific gravity of electrolyte
D. none of the above
Cell short circuit results in_________?
A. low sp. gravity electrolyte
B. abnormal high temperature
C. reduced gassing on charge
D. all above
Batteries are charged by_____________?
A. rectifiers
B. engine generator sets
C. motor generator sets
D. any one of the above methods
Each cell has a vent cap________?
A. to allow gases out when the cell is on charge
B. to add water to the cell if needed
C. to check the level of electrolyte
D. to do all above functions
Recent Comments