Question 1 of 39

1. Which type of inverter circuit?

Two winding transformer inverter

Single transistor inverter

Driven inverter

SCR used inverter

Question 1 of 39

Question 2 of 39

2. Which part loses electrons during electrolysis?

Cathode

Separator

Anode

Electrolyte

Question 2 of 39

Question 3 of 39

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

4.5 V

0 V

1.5 V

3.0 V

Question 3 of 39

Question 4 of 39

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

To hold the positive and negative plate firmly

To keep positive and negative plate in sequence array

To provide a path for electrolyte

To avoid short between positive and negative plates

Question 4 of 39

Question 5 of 39

5. QUESTION: Which law secondary cell works?

Lenz's law

Joule's law

Faradays laws of electromagnetic induction

Faradays laws of electrolysis

Question 5 of 39

Question 6 of 39

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

0.329 g/coulomb

1.1182 g/coulomb

1.1182 mg/coulomb

0.329 mg/coulomb

Question 6 of 39

Question 7 of 39

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

Lead peroxide

Sponge lead

Lead sulphate

Lead dioxide

Question 7 of 39

Question 8 of 39

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

Mercury

Silver oxide

Voltaic

Lithium

Question 8 of 39

Question 9 of 39

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

Hydrometer

Anima meter

High rate discharge tester

Barometer

Question 9 of 39

Question 10 of 39

10. 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

Will get short circuited

Become open circuit

Question 10 of 39

Question 11 of 39

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

Changing with new electrolyte

Recharging the battery for a longer period at low current

Replacing with new electrodes

Recharging the battery for short period at high current

Question 11 of 39

Question 12 of 39

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

Magnetic

Heating

Lighting

Chemical

Question 12 of 39

Question 13 of 39

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

Light dependent resistor

Photo voltaic cell

Light emitting diode

Liquid crystal diode

Question 13 of 39

Question 14 of 39

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

Volt

Ampere hour

Watt

Volt Ampere

Question 14 of 39

Question 15 of 39

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

Lead peroxide(PbO2)

Lead sulphate + water

Sponge lead (Pb)

Lead sulphate(PbSO4)

Question 15 of 39

Question 16 of 39

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

Bending of the electrodes

Reducing strength of electrolyte

Making short between electrodes

Increasing internal resistance

Question 16 of 39

Question 17 of 39

17. What causes buckling defect in lead acid batteries?

Keeping battery discharged for long periods

Charging with low rate for short period

Formation of sediments falling from plates

Overcharging or over discharging

Question 17 of 39

Question 18 of 39

18. What happens to terminal voltage when load increases?

Remains same

Decreases

Increases

Falls to zero

Question 18 of 39

Question 19 of 39

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

Concentrated hydrochloric acid

Dilute sulphuric acid

Ammonium chloride

Potassium hydroxide

Question 19 of 39

Question 20 of 39

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

Partial short

Buckling

Local action

Hard sulphation

Question 20 of 39

Question 21 of 39

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

M = Zt/i

M = Z/it

M = Zit

M = it/Z

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. Which apparatus checks battery charging voltage condition?

Hydrometer

Multimeter

High rate discharge tester

Voltmeter

Question 23 of 39

Question 24 of 39

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

2.5 V

1.8 V

1.5 V

1.2 V

Question 24 of 39

Question 25 of 39

25. 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 25 of 39

Question 26 of 39

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

Trickle charge

Freshening charge

Initial charge

Boost charge

Question 26 of 39

Question 27 of 39

27. What is the total voltage of the circuit?

1.5 Volt

9.0 Volt

7.5 Volt

6.0 Volt

Question 27 of 39

Question 28 of 39

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

Potassium hydroxide

Diluted sulphuric acid

Ammonium chloride

Hydrochloric acid

Question 28 of 39

Question 29 of 39

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

Selection of charging time

Selection of voltage range

Selection of charging method

Selection of current rating

Question 29 of 39

Question 30 of 39

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

Carbon

Zinc

Silver oxide

Copper

Question 30 of 39

Question 31 of 39

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

1.1182 mg/coulomb

0.1182 mg/coulomb

0.001182 mg/coulomb

0.01182 mg/coulomb

Question 31 of 39

Question 32 of 39

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

Decreases with decrease in temperature

Increases with increase in temperature

No effect on change in temperature

Decreases with increase in temperature

Question 32 of 39

Question 33 of 39

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

Determine the AH capacity

Determine the specific gravity of electrolyte

Assess the discharge level of battery

Assess the battery voltage level

Question 33 of 39

Question 34 of 39

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

To escape the gas freely

To check the colour changes in the plates

To check the level of electrolyte

To allow oxygen enter inside

Question 34 of 39

Question 35 of 39

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

E.C.E of electrolyte

Mass deposited in grams

Current in Amperes

Time in seconds

Question 35 of 39

Question 36 of 39

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

Ampere

Watt

Coulomb

Volt

Question 36 of 39

Question 37 of 39

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

Carbon

Zinc

Copper

Lithium

Question 37 of 39

Question 38 of 39

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

Constant current method

Constant potential method

Rectifier method

Trickle charging method

Question 38 of 39

Question 39 of 39

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

Anodic protection

Electrolytic protection

Cathodic protection

Electrostatic protection

Question 39 of 39