ELECTRICIAN 1st YEAR MODULE – Cell and Batteries

Question 1 of 39

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

1.8 V

1.5 V

1.2 V

2.5 V

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Question 2 of 39

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

M = Zit

M = Zt/i

M = it/Z

M = Z/it

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Question 3 of 39

3. What is the total voltage of the circuit?

9.0 Volt

1.5 Volt

6.0 Volt

7.5 Volt

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Question 4 of 39

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

Magnetic

Lighting

Chemical

Heating

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Question 5 of 39

5. What causes buckling defect in lead acid batteries?

Charging with low rate for short period

Keeping battery discharged for long periods

Overcharging or over discharging

Formation of sediments falling from plates

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Question 6 of 39

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

0.1182 mg/coulomb

0.01182 mg/coulomb

0.001182 mg/coulomb

1.1182 mg/coulomb

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Question 7 of 39

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

3.0 V

1.5 V

0 V

4.5 V

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Question 8 of 39

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

Zinc

Lithium

Carbon

Copper

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Question 9 of 39

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

Mass deposited in grams

Current in Amperes

Time in seconds

E.C.E of electrolyte

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Question 10 of 39

10. Which part loses electrons during electrolysis?

Anode

Separator

Electrolyte

Cathode

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Question 11 of 39

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

Cathodic protection

Electrolytic protection

Anodic protection

Electrostatic protection

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Question 12 of 39

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

Rectifier method

Constant potential method

Constant current method

Trickle charging method

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Question 13 of 39

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

Zinc

Silver oxide

Carbon

Copper

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Question 14 of 39

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

Become open circuit

Voltage become zero

No effect will function normally

Will get short circuited

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Question 15 of 39

15. QUESTION: Which law secondary cell works?

Joule's law

Lenz's law

Faradays laws of electrolysis

Faradays laws of electromagnetic induction

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Question 16 of 39

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

Selection of charging method

Selection of voltage range

Selection of current rating

Selection of charging time

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Question 17 of 39

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

Hard sulphation

Local action

Buckling

Partial short

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Question 18 of 39

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

Anima meter

Hydrometer

Barometer

High rate discharge tester

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Question 19 of 39

19. What happens to terminal voltage when load increases?

Decreases

Falls to zero

Remains same

Increases

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Question 20 of 39

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

Watt

Ampere

Coulomb

Volt

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Question 21 of 39

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

To provide a path for electrolyte

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

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Question 22 of 39

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

Bending of the electrodes

Making short between electrodes

Reducing strength of electrolyte

Increasing internal resistance

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Question 23 of 39

23. Which type of inverter circuit?

Driven inverter

SCR used inverter

Two winding transformer inverter

Single transistor inverter

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Question 24 of 39

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

Sponge lead (Pb)

Lead sulphate(PbSO4)

Lead peroxide(PbO2)

Lead sulphate + water

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Question 25 of 39

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

Assess the battery voltage level

Assess the discharge level of battery

Determine the specific gravity of electrolyte

Determine the AH capacity

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Question 26 of 39

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

To check the level of electrolyte

To check the colour changes in the plates

To allow oxygen enter inside

To escape the gas freely

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Question 27 of 39

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

Ammonium chloride

Hydrochloric acid

Potassium hydroxide

Diluted sulphuric acid

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Question 28 of 39

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

Connecting cells in series

Using depolarizing agent

Amalgamating zinc plate

Connecting cells in parallel

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Question 29 of 39

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

Light emitting diode

Photo voltaic cell

Light dependent resistor

Liquid crystal diode

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Question 30 of 39

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

Freshening charge

Trickle charge

Initial charge

Boost charge

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Question 31 of 39

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

Lead peroxide(PbO2)

Lead sulphate + water

Sponge lead(Pb)

Lead sulphate(PbSO4)

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Question 32 of 39

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

Recharging the battery for a longer period at low current

Replacing with new electrodes

Recharging the battery for short period at high current

Changing with new electrolyte

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Question 33 of 39

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

Lithium

Mercury

Silver oxide

Voltaic

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Question 34 of 39

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

Potassium hydroxide

Concentrated hydrochloric acid

Dilute sulphuric acid

Ammonium chloride

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Question 35 of 39

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

Volt

Volt Ampere

Watt

Ampere hour

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Question 36 of 39

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

Lead dioxide

Lead peroxide

Sponge lead

Lead sulphate

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Question 37 of 39

37. Which apparatus checks battery charging voltage condition?

Hydrometer

High rate discharge tester

Multimeter

Voltmeter

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Question 38 of 39

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

1.1182 g/coulomb

0.329 g/coulomb

0.329 mg/coulomb

1.1182 mg/coulomb

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Question 39 of 39

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

No effect on change in temperature

Increases with increase in temperature

Decreases with increase in temperature

Decreases with decrease in temperature

Question 39 of 39