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Electrolysis And Storage Of Batteries — Part 2 MCQs with Explanations

Practice high-yield Electrical Engineering MCQs on Electrolysis And Storage Of Batteries — Part 2 with worked academic solutions for WAPDA, NTDC, IESCO, LESCO, PPSC, FPSC.

Questions
40
Difficulty Level
Exam-Level
Target Exams
WAPDA, NTDC, IESCO...
Estimated Time
48 mins
Exam-Level WAPDA NTDC IESCO LESCO PPSC FPSC
Verified for Commission Syllabus • Oct 14, 2026
40

Verified Practice Questions

Interactive test mode with detailed academic worked solutions

Live Progress | 0/40 answered
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Question 1 of 40
★ WAPDA ★ NTDC

48 ampere-hour capacity would deliver a current of

Question 2 of 40
★ WAPDA ★ NTDC

Following will occur if level of electrolyte falls below plates

Question 3 of 40
★ WAPDA ★ NTDC

In order that a hydrometer may float vertically in electrolyte its C.G. should be

Question 4 of 40
★ WAPDA ★ NTDC

Which of the following factors adversely affects the capacity of the leadacid battery ?

Question 5 of 40
★ WAPDA ★ NTDC

The current flow through electrolyte is due to the movement of

Question 6 of 40
★ WAPDA ★ NTDC

The active materials on the positive and negative plates of a fully charged lead-acid battery are

Question 7 of 40
★ WAPDA ★ NTDC

Cells are connected in parallel to

Question 8 of 40
★ WAPDA ★ NTDC

On the average the ampere-hour efficiency of an Edison cell is about

Question 9 of 40
★ WAPDA ★ NTDC

On overcharging a battery

Question 10 of 40
★ WAPDA ★ NTDC

Batteries are charged by

Question 11 of 40
★ WAPDA ★ NTDC

The active material of the positive plates of silver-zinc batteries is

Question 12 of 40
★ WAPDA ★ NTDC

The capacity of a lead-acid cell does not depend on its

Question 13 of 40
★ WAPDA ★ NTDC

During the charging and discharging of a nickel-iron cell

Question 14 of 40
★ WAPDA ★ NTDC

Excessive charging a battery tends to

Question 15 of 40
★ WAPDA ★ NTDC

_______ of electrolyte indicates the state of charge of the battery

Question 16 of 40
★ WAPDA ★ NTDC

As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of

Question 17 of 40
★ WAPDA ★ NTDC

Which of the following primary cells has the highest voltage ?

Question 18 of 40
★ WAPDA ★ NTDC

Petroleum jelly is applied to the electrical connections to the lead-acid battery

Question 19 of 40
★ WAPDA ★ NTDC

Five 2 V cells are connected in parallel. The output voltage is

Question 20 of 40
★ WAPDA ★ NTDC

Charging a sulphated battery at high rate results in

Question 21 of 40
★ WAPDA ★ NTDC

During the idle period of the battery, strong electrolyte tends to change the active material of the cell into

Question 22 of 40
★ WAPDA ★ NTDC

Electrolyte used in an Edison cell is

Question 23 of 40
★ WAPDA ★ NTDC

Life of the batteries is in the following ascending order.

Question 24 of 40
★ WAPDA ★ NTDC

Mercury cell has which of the following characteristics?

Question 25 of 40
★ WAPDA ★ NTDC

Following will happen if battery charging rate is too high

Question 26 of 40
★ WAPDA ★ NTDC

Negative plate of an Edison cell is made of

Question 27 of 40
★ WAPDA ★ NTDC

The body of Edison cell is made of

Question 28 of 40
★ WAPDA ★ NTDC

The active materials of a nickel-iron battery are

Question 29 of 40
★ WAPDA ★ NTDC

As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its

Question 30 of 40
★ WAPDA ★ NTDC

Dry cell is modification of

Question 31 of 40
★ WAPDA ★ NTDC

In alkaline cell the electrolyte is

Question 32 of 40
★ WAPDA ★ NTDC

In a lead-acid cell, lead is called as

Question 33 of 40
★ WAPDA ★ NTDC

The common impurity in the electrolyte of lead-acid battery is

Question 34 of 40
★ WAPDA ★ NTDC

The substances which combine together to store electrical energy during the charge are called ______ materials

Question 35 of 40
★ WAPDA ★ NTDC

If a lead-acid cell is discharged below 1.8 V the following will happen.

Question 36 of 40
★ WAPDA ★ NTDC

Sulphated cells are indicated by

Question 37 of 40
★ WAPDA ★ NTDC

Weston standard cell at 20°C has voltage of ____ volts.

Question 38 of 40
★ WAPDA ★ NTDC

In constant voltage charging method, the charging current from discharged to fully charged condition

Question 39 of 40
★ WAPDA ★ NTDC

In constant-current charging method, the supply voltage from discharged to fully charged condition

Question 40 of 40
★ WAPDA ★ NTDC

A battery of 6 cells will show a drop of _____ volts from fully charged state to fully discharged state.

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In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.

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