Question 1 of 39

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

Potassium hydroxide

Diluted sulphuric acid

Ammonium chloride

Hydrochloric acid

Question 1 of 39

Question 2 of 39

2. Which part loses electrons during electrolysis?

Anode

Separator

Cathode

Electrolyte

Question 2 of 39

Question 3 of 39

3. What causes buckling defect in lead acid batteries?

Overcharging or over discharging

Formation of sediments falling from plates

Keeping battery discharged for long periods

Charging with low rate for short period

Question 3 of 39

Question 4 of 39

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

Buckling

Local action

Partial short

Hard sulphation

Question 4 of 39

Question 5 of 39

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

Decreases with decrease in temperature

Decreases with increase in temperature

Increases with increase in temperature

No effect on change in temperature

Question 5 of 39

Question 6 of 39

6. 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 escape the gas freely

To allow oxygen enter inside

Question 6 of 39

Question 7 of 39

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

Voltage become zero

No effect will function normally

Become open circuit

Will get short circuited

Question 7 of 39

Question 8 of 39

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

Bending of the electrodes

Increasing internal resistance

Making short between electrodes

Reducing strength of electrolyte

Question 8 of 39

Question 9 of 39

9. Which apparatus checks battery charging voltage condition?

Multimeter

Hydrometer

Voltmeter

High rate discharge tester

Question 9 of 39

Question 10 of 39

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

M = it/Z

M = Zit

M = Z/it

M = Zt/i

Question 10 of 39

Question 11 of 39

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

Sponge lead(Pb)

Lead peroxide(PbO2)

Lead sulphate(PbSO4)

Lead sulphate + water

Question 11 of 39

Question 12 of 39

12. Which type of inverter circuit?

Single transistor inverter

Two winding transformer inverter

Driven inverter

SCR used inverter

Question 12 of 39

Question 13 of 39

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

Trickle charging method

Constant potential method

Rectifier method

Constant current method

Question 13 of 39

Question 14 of 39

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

Voltaic

Lithium

Mercury

Silver oxide

Question 14 of 39

Question 15 of 39

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

0.001182 mg/coulomb

0.01182 mg/coulomb

1.1182 mg/coulomb

0.1182 mg/coulomb

Question 15 of 39

Question 16 of 39

16. What happens to terminal voltage when load increases?

Increases

Falls to zero

Decreases

Remains same

Question 16 of 39

Question 17 of 39

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

Current in Amperes

Mass deposited in grams

Time in seconds

E.C.E of electrolyte

Question 17 of 39

Question 18 of 39

18. 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 18 of 39

Question 19 of 39

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

Light dependent resistor

Photo voltaic cell

Light emitting diode

Liquid crystal diode

Question 19 of 39

Question 20 of 39

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

To avoid short between positive and negative plates

To provide a path for electrolyte

To hold the positive and negative plate firmly

To keep positive and negative plate in sequence array

Question 20 of 39

Question 21 of 39

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

Recharging the battery for a longer period at low current

Recharging the battery for short period at high current

Replacing with new electrodes

Changing with new electrolyte

Question 21 of 39

Question 22 of 39

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

Connecting cells in series

Connecting cells in parallel

Using depolarizing agent

Amalgamating zinc plate

Question 22 of 39

Question 23 of 39

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

Boost charge

Initial charge

Trickle charge

Freshening charge

Question 23 of 39

Question 24 of 39

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

Watt

Ampere

Coulomb

Volt

Question 24 of 39

Question 25 of 39

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

Copper

Lithium

Zinc

Carbon

Question 25 of 39

Question 26 of 39

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

High rate discharge tester

Hydrometer

Barometer

Anima meter

Question 26 of 39

Question 27 of 39

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

Carbon

Zinc

Copper

Silver oxide

Question 27 of 39

Question 28 of 39

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

2.5 V

1.8 V

1.5 V

1.2 V

Question 28 of 39

Question 29 of 39

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

Lead dioxide

Sponge lead

Lead peroxide

Lead sulphate

Question 29 of 39

Question 30 of 39

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

Electrostatic protection

Electrolytic protection

Anodic protection

Cathodic protection

Question 30 of 39

Question 31 of 39

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

1.1182 mg/coulomb

0.329 mg/coulomb

1.1182 g/coulomb

0.329 g/coulomb

Question 31 of 39

Question 32 of 39

32. 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 32 of 39

Question 33 of 39

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

4.5 V

0 V

3.0 V

1.5 V

Question 33 of 39

Question 34 of 39

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

Magnetic

Lighting

Heating

Chemical

Question 34 of 39

Question 35 of 39

35. QUESTION: Which law secondary cell works?

Faradays laws of electromagnetic induction

Joule's law

Lenz's law

Faradays laws of electrolysis

Question 35 of 39

Question 36 of 39

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

Assess the battery voltage level

Determine the specific gravity of electrolyte

Assess the discharge level of battery

Determine the AH capacity

Question 36 of 39

Question 37 of 39

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

Concentrated hydrochloric acid

Dilute sulphuric acid

Ammonium chloride

Potassium hydroxide

Question 37 of 39

Question 38 of 39

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

Watt

Ampere hour

Volt

Volt Ampere

Question 38 of 39

Question 39 of 39

39. What is the total voltage of the circuit?

1.5 Volt

6.0 Volt

7.5 Volt

9.0 Volt

Question 39 of 39