Electrical Engineering MCQs

Page No. 198

Cells are connected in parallel to__________?


a increase the efficiency


bincrease the current capacity


cincrease the voltage output


dincrease the internal resistance



Which among the following constitutes the major load for an automobile battery _________?


aBrake light


bSelf starter


cParking lights


dSpark plugs


View Answer Self starter

When the load resistance equals the generator resistance which of the following will be maximum __________?


aCurrent


bEfficiency of the circuit


cPower in the load resistance


dVoltage across the load resistance



Under normal charging rate, the charging current should be__________?


a10% of capacity


b20% of capacity


c30% of capacity


d 40% of capacity


View Answer 10% of capacity

Which of the following is incorrect ?


aA storage cell has a reversible chemical reaction


bA lead-acid cell can be recharged


cA carbon-zinc cell has unlimited shelf life


dA primary cell has an irreversible chemical reaction



While preparing electrolyte for a lead-acid battery___________?


awater is poured into acid


bacid is poured into water


canyone of the two can be added to other chemical


dNone



The common impurity in the electrolyte of lead-acid battery is_____________?


achlorine


bdust particles


clead crystals


diron


View Answer iron

Petroleum jelly is applied to the electrical connections to the lead-acid battery___________?


aprevent local heating


bprevent short-circuiting


creduce path resistance


dprevent corrosion


View Answer prevent corrosion

Which of the following cell has a. reversible chemical reaction ___________?


aLead-acid


bMercury oxide


cCarbon-zinc


dSilver-oxide


View Answer Lead-acid

When two batteries are connected in parallel, it should be ensured that___________?


athey have same e.m.f.


bthey have same make


cthey have same ampere-hour capacity


dthey have identical internal resistance


View Answer they have same e.m.f.

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