Basic Electrical mcq online test part-2

Basic Electrical Engineering Quiz 

Electrician MCQ Part -2

Basic Electrical Engineering Quiz Types of questions and answers in Electrical Engineering , welding, Electrical Engineering  quiz questions, and answers. 

 

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

A) No effect on change in temperature
B) Increases with increase in temperature
C) Decreases with increase in temperature
D) Decreases with decrease in temperature

ANSWER= (D) Decreases with decrease in temperature

 

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

A) Determine the AH capacity
B) Assess the battery voltage level
C) Assess the discharge level of battery
D) Determine the specific gravity of electrolyte

ANSWER= (D) Determine the specific gravity of electrolyte

 

3. What is the formula for Faraday’s first law of electrolysis?

A) M = it gm
B) M = zit gm
C) M = it/z gm
D) M = z/it gm

ANSWER= (B) M = zit gm

 

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

A) Hydrochloric acid
B) Ammonium chloride
C) Potassium hydroxide
D) Diluted sulphuric acid

ANSWER= (D) Diluted sulphuric acid

 

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

A) Sponge lead(Pb)
B) Lead peroxide(PbO2)
C) Lead sulphate(PbSO4)
D) Lead sulphate + water

ANSWER= (B) Lead peroxide(PbO2)

 

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

A) To escape the gas freely
B) To allow oxygen enter inside
C) To check the level of electrolyte
D) To check the colour changes in the plates

ANSWER= (A) To escape the gas freely

 

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

A) Rectifier method
B) Trickle charging method
C) Constant current method
D) Constant potential method

ANSWER= (B) Trickle charging method

 

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

A) Changing with new electrolyte
B) Replacing with new electrodes
C) Recharging the battery for a longer period at low current
D) Recharging the battery for short period at high current

ANSWER= (C) Recharging the battery for a longer period at low current

 

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

A) Zinc
B) Copper
C) Carbon
D) Silver oxide

ANSWER= (A) Zinc

 

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

A) 0.001182 mg/coulomb
B) 0.01182 mg/coulomb
C) 0.1182 mg/coulomb
D) 1.1182 mg/coulomb

ANSWER= (D) 1.1182 mg/coulomb

 

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

A) Sponge lead(Pb)
B) Lead peroxide(PbO2)
C) Lead sulphate(PbSO4)
D) Lead sulphate + water

ANSWER= (C) Lead sulphate (PbSO4)

 

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

A) To provide a path for electrolyte
B) To hold the positive and negative plate firmly
C) To avoid short in between the positive and negative plates
D) To keep positive and negative plate in a sequence array

ANSWER= (C) To avoid short in between the positive and negative plates .

 

13. Which instrument is used to measure the specific gravity of electrolyte in lead acid battery?

A) Barometer
B) Hydrometer
C) Anima meter
D) High rate discharge tester

ANSWER= (B) Hydrometer

 

14. Which type of inverter circuit?

A) Driven inverter
B) SCR used inverter
C) Single transistor inverter
D) Two winding transformer inverter

ANSWER= (B) SCR used inverter

 

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

A) Bending of the electrodes
B) Reducing the strength of electrolyte
C) Making short between the electrodes
D) Increasing the internal resistance

ANSWER= (A) Bending of the electrodes