With the increase of battery temperature, the specific gravity of electrolyte

increases

decreases

remains the same

none of these

adding distilled water

adding sulphuric acid

applying voltage in the same direction to that of charging

applying voltage in the reverse direction to that of charging

a maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid

a maintenance free battery has a relatively short shelf life when compared with standard batteries

since it is sealed, the water in a maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water

recharging of a maintenance free battery is neither required nor possible

has lead antimony plate grid

has lead calcium plate grid

does not contain acid

does not contain water

supply electric power

convert mechanical energy into electrical energy

continually recharge the battery

partly convert engine power into electric power