Which of the following is incorrect ? A. A storage cell has a reversible chemical reaction B. A lead-acid cell can be rechargedC. A carbon-zinc cell has unlimited shelf life D. A primary cell has an irreversible chemical reaction
While preparing electrolyte for a lead-acid battery___________? A. water is poured into acidB. acid is poured into water C. anyone of the two can be added to other chemical
The common impurity in the electrolyte of lead-acid battery is_____________? A. chlorine B. dust particles C. lead crystalsD. iron
Petroleum jelly is applied to the electrical connections to the lead-acid battery___________? A. prevent local heating B. prevent short-circuiting C. reduce path resistanceD. prevent corrosion
Which of the following cell has a. reversible chemical reaction ___________? A. Lead-acid B. Mercury oxide C. Carbon-zinc D. Silver-oxide
When two batteries are connected in parallel, it should be ensured that___________? A. they have same e.m.f. B. they have same make C. they have same ampere-hour capacity D. they have identical internal resistance
Which of the following has lower specific gravity V__________? A. Dilute H2S04 B. Concentrated H2SO4C. Water D. Any of the above
Which of the following battery is used for air-craft _____________? A. Lead-acid batteryB. Nickel-iron battery C. Dry cell battery D. Silver oxide battery
In a battery cover is placed over the element and sealed to the top of the battery container. This is done____________? A. to reduce evaporation of water from electrolyte B. to exclude dirt and foreign matter from the electrolyteC. to…
Hydrogen evolved during charging produces explosive mixture when it is more than___________? A. 2% B. 4% C. 6%D. 8%