Question 1 of 39

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

Barometer

Anima meter

High rate discharge tester

Hydrometer

Question 1 of 39

Question 2 of 39

2. 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 2 of 39

Question 3 of 39

3. 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 3 of 39

Question 4 of 39

4. What causes buckling defect in lead acid batteries?

Formation of sediments falling from plates

Overcharging or over discharging

Charging with low rate for short period

Keeping battery discharged for long periods

Question 4 of 39

Question 5 of 39

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

Freshening charge

Boost charge

Initial charge

Trickle charge

Question 5 of 39

Question 6 of 39

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

Increases with increase in temperature

Decreases with increase in temperature

No effect on change in temperature

Decreases with decrease in temperature

Question 6 of 39

Question 7 of 39

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

Lead sulphate

Lead peroxide

Lead dioxide

Sponge lead

Question 7 of 39

Question 8 of 39

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

Watt

Volt

Ampere hour

Volt Ampere

Question 8 of 39

Question 9 of 39

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

1.1182 mg/coulomb

0.001182 mg/coulomb

0.01182 mg/coulomb

0.1182 mg/coulomb

Question 9 of 39

Question 10 of 39

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

Hard sulphation

Local action

Buckling

Partial short

Question 10 of 39

Question 11 of 39

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

Trickle charging method

Constant current method

Constant potential method

Rectifier method

Question 11 of 39

Question 12 of 39

12. QUESTION: Which law secondary cell works?

Lenz's law

Faradays laws of electrolysis

Joule's law

Faradays laws of electromagnetic induction

Question 12 of 39

Question 13 of 39

13. Which type of inverter circuit?

Driven inverter

Single transistor inverter

Two winding transformer inverter

SCR used inverter

Question 13 of 39

Question 14 of 39

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

Zinc

Carbon

Lithium

Copper

Question 14 of 39

Question 15 of 39

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

To keep positive and negative plate in sequence array

To provide a path for electrolyte

To hold the positive and negative plate firmly

To avoid short between positive and negative plates

Question 15 of 39

Question 16 of 39

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

Reducing strength of electrolyte

Increasing internal resistance

Bending of the electrodes

Making short between electrodes

Question 16 of 39

Question 17 of 39

17. What is the total voltage of the circuit?

9.0 Volt

1.5 Volt

7.5 Volt

6.0 Volt

Question 17 of 39

Question 18 of 39

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

M = Z/it

M = it/Z

M = Zt/i

M = Zit

Question 18 of 39

Question 19 of 39

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

Concentrated hydrochloric acid

Ammonium chloride

Dilute sulphuric acid

Potassium hydroxide

Question 19 of 39

Question 20 of 39

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

Copper

Carbon

Zinc

Silver oxide

Question 20 of 39

Question 21 of 39

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

Hydrochloric acid

Potassium hydroxide

Diluted sulphuric acid

Ammonium chloride

Question 21 of 39

Question 22 of 39

22. What happens to terminal voltage when load increases?

Remains same

Decreases

Falls to zero

Increases

Question 22 of 39

Question 23 of 39

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

Watt

Ampere

Coulomb

Volt

Question 23 of 39

Question 24 of 39

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

To escape the gas freely

To check the level of electrolyte

To allow oxygen enter inside

To check the colour changes in the plates

Question 24 of 39

Question 25 of 39

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

Amalgamating zinc plate

Connecting cells in parallel

Connecting cells in series

Using depolarizing agent

Question 25 of 39

Question 26 of 39

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

Selection of current rating

Selection of voltage range

Selection of charging time

Selection of charging method

Question 26 of 39

Question 27 of 39

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

Replacing with new electrodes

Recharging the battery for a longer period at low current

Recharging the battery for short period at high current

Changing with new electrolyte

Question 27 of 39

Question 28 of 39

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

0 V

4.5 V

3.0 V

1.5 V

Question 28 of 39

Question 29 of 39

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

Will get short circuited

Become open circuit

No effect will function normally

Voltage become zero

Question 29 of 39

Question 30 of 39

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

Magnetic

Heating

Lighting

Chemical

Question 30 of 39

Question 31 of 39

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

Light emitting diode

Light dependent resistor

Liquid crystal diode

Photo voltaic cell

Question 31 of 39

Question 32 of 39

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

1.2 V

2.5 V

1.8 V

1.5 V

Question 32 of 39

Question 33 of 39

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

Assess the discharge level of battery

Determine the specific gravity of electrolyte

Assess the battery voltage level

Determine the AH capacity

Question 33 of 39

Question 34 of 39

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

Lead peroxide(PbO2)

Lead sulphate + water

Lead sulphate(PbSO4)

Sponge lead(Pb)

Question 34 of 39

Question 35 of 39

35. Which apparatus checks battery charging voltage condition?

Hydrometer

Voltmeter

Multimeter

High rate discharge tester

Question 35 of 39

Question 36 of 39

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

Lithium

Mercury

Voltaic

Silver oxide

Question 36 of 39

Question 37 of 39

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

1.1182 g/coulomb

0.329 g/coulomb

1.1182 mg/coulomb

0.329 mg/coulomb

Question 37 of 39

Question 38 of 39

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

Electrostatic protection

Anodic protection

Cathodic protection

Electrolytic protection

Question 38 of 39

Question 39 of 39

39. Which part loses electrons during electrolysis?

Anode

Electrolyte

Separator

Cathode

Question 39 of 39