Question 1 of 39

1. What is the effect of buckling defect in lead acid battery?

Increasing internal resistance

Reducing strength of electrolyte

Bending of the electrodes

Making short between electrodes

Question 1 of 39

Question 2 of 39

2. What is the formula for Faraday's first law of electrolysis?

M = it/Z

M = Zt/i

M = Z/it

M = Zit

Question 2 of 39

Question 3 of 39

3. QUESTION: Which cell is most often used in digital watches?

Silver oxide

Voltaic

Lithium

Mercury

Question 3 of 39

Question 4 of 39

4. QUESTION: Which technique is used to control the corrosion of a metal surface?

Electrostatic protection

Electrolytic protection

Anodic protection

Cathodic protection

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Question 5 of 39

5. What is the effect if one cell is connected with reverse polarity in a parallel combination circuit?

Will get short circuited

Voltage become zero

Become open circuit

No effect will function normally

Question 5 of 39

Question 6 of 39

6. QUESTION: Which material is used to make negative plates in lead acid battery?

Sponge lead

Lead peroxide

Lead dioxide

Lead sulphate

Question 6 of 39

Question 7 of 39

7. QUESTION: Which effect causes by passing electric current in liquids?

Heating

Lighting

Magnetic

Chemical

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Question 8 of 39

8. QUESTION: How the capacity of batteries is specified?

Watt

Ampere hour

Volt Ampere

Volt

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Question 9 of 39

9. What is the Electro Chemical Equivalent (ECE) of copper?

0.329 g/coulomb

1.1182 g/coulomb

0.329 mg/coulomb

1.1182 mg/coulomb

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Question 10 of 39

10. Which is used as an electrolyte in lead acid battery?

Hydrochloric acid

Ammonium chloride

Potassium hydroxide

Diluted sulphuric acid

Question 10 of 39

Question 11 of 39

11. Which instrument measures specific gravity of electrolyte in lead acid battery?

Hydrometer

High rate discharge tester

Barometer

Anima meter

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Question 12 of 39

12. What is the effect on output power with respect to temperature in solar cells?

Decreases with increase in temperature

No effect on change in temperature

Decreases with decrease in temperature

Increases with increase in temperature

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Question 13 of 39

13. Why the vent plug is kept open during charging of a battery?

To check the colour changes in the plates

To check the level of electrolyte

To allow oxygen enter inside

To escape the gas freely

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Question 14 of 39

14. Which material is used as cathode (-ve) electrode in silver oxide battery?

Carbon

Zinc

Copper

Silver oxide

Question 14 of 39

Question 15 of 39

15. Which apparatus checks battery charging voltage condition?

High rate discharge tester

Hydrometer

Multimeter

Voltmeter

Question 15 of 39

Question 16 of 39

16. Which part loses electrons during electrolysis?

Separator

Anode

Cathode

Electrolyte

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Question 17 of 39

17. What is the function of fine selector switch in battery charger?

Selection of voltage range

Selection of current rating

Selection of charging method

Selection of charging time

Question 17 of 39

Question 18 of 39

18. What happens to terminal voltage when load increases?

Falls to zero

Decreases

Remains same

Increases

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Question 19 of 39

19. QUESTION: What is the unit of electric charge?

Watt

Ampere

Coulomb

Volt

Question 19 of 39

Question 20 of 39

20. What is the Electro Chemical Equivalent (ECE) of silver?

1.1182 mg/coulomb

0.1182 mg/coulomb

0.01182 mg/coulomb

0.001182 mg/coulomb

Question 20 of 39

Question 21 of 39

21. What purpose the hydrometer is used during charging of battery?

Determine the specific gravity of electrolyte

Assess the battery voltage level

Determine the AH capacity

Assess the discharge level of battery

Question 21 of 39

Question 22 of 39

22. What causes buckling defect in lead acid batteries?

Formation of sediments falling from plates

Keeping battery discharged for long periods

Overcharging or over discharging

Charging with low rate for short period

Question 22 of 39

Question 23 of 39

23. How is local action defect prevented in voltaic cell?

Connecting cells in series

Using depolarizing agent

Connecting cells in parallel

Amalgamating zinc plate

Question 23 of 39

Question 24 of 39

24. What does 'Z' represent in formula M=Z/it?

Current in Amperes

Time in seconds

Mass deposited in grams

E.C.E of electrolyte

Question 24 of 39

Question 25 of 39

25. What is the outcome at the positive plate, after the chemical reaction in lead acid battery during charging?

Lead peroxide(PbO2)

Lead sulphate(PbSO4)

Sponge lead (Pb)

Lead sulphate + water

Question 25 of 39

Question 26 of 39

26. QUESTION: Which electrolyte used in carbon zinc dry cells?

Potassium hydroxide

Ammonium chloride

Dilute sulphuric acid

Concentrated hydrochloric acid

Question 26 of 39

Question 27 of 39

27. QUESTION: What is the name of defect that bending of plates in secondary cells?

Buckling

Local action

Hard sulphation

Partial short

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Question 28 of 39

28. How the hard sulphation defect in lead acid battery can be rectified?

Recharging the battery for short period at high current

Replacing with new electrodes

Changing with new electrolyte

Recharging the battery for a longer period at low current

Question 28 of 39

Question 29 of 39

29. In which method the battery is charged at low current for long period?

Constant potential method

Trickle charging method

Rectifier method

Constant current method

Question 29 of 39

Question 30 of 39

30. Which is used as positive electrode in dry cell?

Carbon

Copper

Lithium

Zinc

Question 30 of 39

Question 31 of 39

31. What is the total output voltage of the circuit?

1.5 V

4.5 V

0 V

3.0 V

Question 31 of 39

Question 32 of 39

32. Which type of inverter circuit?

Two winding transformer inverter

SCR used inverter

Single transistor inverter

Driven inverter

Question 32 of 39

Question 33 of 39

33. QUESTION: Which law secondary cell works?

Joule's law

Faradays laws of electromagnetic induction

Faradays laws of electrolysis

Lenz's law

Question 33 of 39

Question 34 of 39

34. What is the total voltage of the circuit?

6.0 Volt

1.5 Volt

7.5 Volt

9.0 Volt

Question 34 of 39

Question 35 of 39

35. What is the purpose of separator in lead acid battery?

To avoid short between positive and negative plates

To hold the positive and negative plate firmly

To keep positive and negative plate in sequence array

To provide a path for electrolyte

Question 35 of 39

Question 36 of 39

36. QUESTION: What is the method of charging if the battery is to be charged for short duration at higher rate?

Initial charge

Freshening charge

Trickle charge

Boost charge

Question 36 of 39

Question 37 of 39

37. QUESTION: Which device converts sunlight into electrical energy?

Light emitting diode

Light dependent resistor

Photo voltaic cell

Liquid crystal diode

Question 37 of 39

Question 38 of 39

38. What is the outcome of the chemical reaction in negative plate of lead acid battery during discharging?

Sponge lead(Pb)

Lead sulphate + water

Lead peroxide(PbO2)

Lead sulphate(PbSO4)

Question 38 of 39

Question 39 of 39

39. QUESTION: What is the output voltage of lithium cell?

2.5 V

1.8 V

1.2 V

1.5 V

Question 39 of 39