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

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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

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bA lead-acid cell can be recharged

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cA carbon-zinc cell has unlimited shelf life

✓


dA primary cell has an irreversible chemical reaction

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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

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


achlorine

✖


bdust particles

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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

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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

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cthey have same ampere-hour capacity

✖


dthey have identical internal resistance

✖


View Answer they have same e.m.f.

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