electrical

Electrolysis and Storage Batteries MCQ With Answers Page - 3

1.

Level of electrolyte in a cell should be ……… the level of plates.

Answer/ Hint      

Answer : C

Explanation :

2.

Proper charging rate of a battery in ampere is about ……. Of its ampere-hour capacity.

Answer/ Hint      

Answer : A

Explanation :

3.

During discharge, the active material of both the positive and negative plates is changed to.

Answer/ Hint      

Answer : D

Explanation :

4.

………. Of electrolyte indicates the state of charge of the battery

Answer/ Hint      

Answer : D

Explanation :

5.

The following indicates that the battery on charge has attained full charge

Answer/ Hint      

Answer : D

Explanation :

6.

If the e.m.f of a cell is 2 V, internal resistance 0.2 Ω and external resistance 0.8 Ω then the current delivered will be

Answer/ Hint      

Answer : D

Explanation :

7.

Dry cell is modification of

Answer/ Hint      

Answer : B

Explanation :

8.

Capacity of a battery is expressed in

Answer/ Hint      

Answer : A

Explanation :

9.

In alkaline cell the electrolyte is

Answer/ Hint      

Answer : D

Explanation :

10.

Self-charge of a Ni-Fe cell is ……… Edison cell

Answer/ Hint      

Answer : B

Explanation :

11.

For given ampere capacity, weight of lead-acid cell is ….. times that of the Edison cell

Answer/ Hint      

Answer : D

Explanation :

12.

All dry cell when new have about…. V

Answer/ Hint      

Answer : C

Explanation :

13.

Polarisation in a cell is due to accumulation of …….. gas over anode

Answer/ Hint      

Answer : A

Explanation :

14.

To prevent local action in battery, only … is used in electrolytes.

Answer/ Hint      

Answer : B

Explanation :

15.

Even though voltage of the dry cell, big or small is 1.5 v, small cell delivers less current because it has comparatively ………. internal resistance.

Answer/ Hint      

Answer : C

Explanation :

16.

Ampere hour capacity of an industrial battery is based on …….. hour discharge rate

Answer/ Hint      

Answer : A

Explanation :

17.

The body of Edison cell is made of

Answer/ Hint      

Answer : C

Explanation :

18.

Specific gravity of electrolyte in Edison

Answer/ Hint      

Answer : D

Explanation :

19.

All the electrical connections between the battery and vehicle should be by

Answer/ Hint      

Answer : D

Explanation :

20.

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

Answer/ Hint      

Answer : C

Explanation :

21.

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

Answer/ Hint      

Answer : B

Explanation :

22.

Charging of sulphated battery produces ………… heat

Answer/ Hint      

Answer : D

Explanation :

23.

Hydrogen evolved during charging produces explosive mixture when it is more than

Answer/ Hint      

Answer : D

Explanation :

24.

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

Answer/ Hint      

Answer : C

Explanation :

25.

When two cells of unequal voltages are in parallel, the e.m.f of the combination is equal to the e.m.f of the ……. Cell

Answer/ Hint      

Answer : B

Explanation :

26.

Battery charging room is to be kept well ventilated so as to reduce the hydrogen concentration below ...... percent.

Answer/ Hint      

Answer : C

Explanation :

27.

Mercury cell has which of the characteristics?

Answer/ Hint      

Answer : D

Explanation :

28.

To avoid freezing in cold weather, sp. Gravity of electrolyte of lead-acid cell should be kept above

Answer/ Hint      

Answer : C

Explanation :

29.

Charging a sulphated battery at high rate results in

Answer/ Hint      

Answer : D

Explanation :

30.

Short circuiting of a cell may be caused by

Answer/ Hint      

Answer : D

Explanation :

31.

In a battery cover is placed over the element and sealed to the top of the battery container. This is done

Answer/ Hint      

Answer : C

Explanation :

32.

For a cell to work, which of the following condition(s) become necessary?

Answer/ Hint      

Answer : D

Explanation :

33.

Which of the following primary cell has the lowest voltage?

Answer/ Hint      

Answer : C

Explanation :

34.

Which of the following primary cells has the highest voltage?

Answer/ Hint      

Answer : C

Explanation :

35.

While preparing electrolyte for lead-acid battery

Answer/ Hint      

Answer : B

Explanation :

36.

Which of the following battery is used for air-craft?

Answer/ Hint      

Answer : B

Explanation :

37.

Which of the following cell has a reversible chemical reaction?

Answer/ Hint      

Answer : A

Explanation :

38.

Which of the following is incorrect?

Answer/ Hint      

Answer : C

Explanation :

39.

The internal resistance of a dry cell is of order of

Answer/ Hint      

Answer : B

Explanation :

40.

Which of the following has the lower sp. gravity?

Answer/ Hint      

Answer : C

Explanation :

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