Online Test For Second Semester Electrician Students(Module 1 Cell And Batteries)

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| By Vishnu V
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Vishnu V
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Quizzes Created: 1 | Total Attempts: 137
| Attempts: 137
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  • 1/21 Questions

    Which device convertssunlight into electrical energy

    • Photo voltaic cell
    • Liquid crystal diode
    • Light emitting diode
    • Light dependentresistor
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About This Quiz

This online test for second semester electrician students focuses on Module 1, covering cells and batteries. It assesses knowledge in photovoltaic cells, Faraday's laws of electrolysis, electric charge units, battery capacity, and common defects in secondary cells, preparing students for practical applications in electrical engineering.

Online Test For Second Semester Electrician Students(Module 1 Cell And Batteries) - Quiz

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  • 2. 

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

    • Initial charge 

    • Boost charge

    • Trickle charge

    • Freshening charge

    Correct Answer
    A. Boost charge
    Explanation
    Boost charging is the method of charging a battery for a short duration at a higher rate. This is done to quickly replenish the battery's charge and bring it to a suitable level for normal use. Boost charging is commonly used when a battery needs to be charged quickly, such as in emergency situations or when there is limited time available for charging. This method helps to provide a rapid charge to the battery, allowing it to be used again in a shorter amount of time.

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  • 3. 

    Which effect causes by passsing electric curent in liquids?

    • Heating

    • Lighting

    • Magnetic

    • Chemical

    Correct Answer
    A. Chemical
    Explanation
    Passing an electric current through liquids can cause a chemical effect. This is because the movement of electrons can break down molecules and create new chemical compounds. This process is known as electrolysis and is commonly used in various applications such as electroplating, water splitting, and electrolytic cells.

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  • 4. 

    What is the name of defect that bending of plates in secondary cells?

    • Buckling

    • Local action

    •  partial short

    • Hard sulphation

    Correct Answer
    A. Buckling
    Explanation
    Buckling is the correct answer because it refers to the defect of bending in plates in secondary cells. Buckling occurs when the plates in a battery become deformed or distorted, typically due to excessive pressure or stress. This can lead to reduced battery performance and potential damage to the battery. Therefore, buckling is the appropriate term to describe the bending of plates in secondary cells.

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  • 5. 

    What is the formula for faradays first law of electrolysis?

    • M=z/it

    • M=zit

    • M=it/z

    • M=zt/i

    Correct Answer
    A. M=zit
    Explanation
    The formula for Faraday's first law of electrolysis is M = zit, where M represents the mass of the substance deposited or liberated at the electrode, z is the electrochemical equivalent, i is the current, and t is the time. This formula shows the relationship between the amount of substance deposited or liberated during electrolysis and the current and time.

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  • 6. 

    Which law secondary cell works?

    • Lenzs law

    • Jouls law

    • Faradays laws of electrolysis

    • Faradays laws of electromagnetic induction

    Correct Answer
    A. Faradays laws of electrolysis
    Explanation
    The correct answer is "faradays laws of electrolysis." Faraday's laws of electrolysis describe the relationship between the amount of substance produced or consumed during an electrolytic reaction and the quantity of electricity passed through the electrolyte. This law explains the process of electrolysis, where an electric current is used to drive a non-spontaneous chemical reaction. Lenz's law, Joule's law, and Faraday's laws of electromagnetic induction are unrelated to the functioning of secondary cells.

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  • 7. 

    How the capacity of batteries is specified

    • Volt

    • Watt

    • Volt ampere

    • Ampere hour

    Correct Answer
    A. Ampere hour
    Explanation
    The capacity of batteries is specified in ampere hour, which is a unit of electrical charge. It represents the amount of electrical charge that a battery can deliver over a certain period of time. This unit is commonly used to measure the capacity of batteries because it takes into account both the current (amperes) and the duration (hours) for which the battery can provide a steady flow of current. Therefore, ampere hour is the most appropriate unit to specify the capacity of batteries.

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  • 8. 

    What purpose the hydrometr is used during charging of battery?

    • Determine the AH capacity

    • Assess the battery voltage level 

    • Assess the discharge level of battery

    • Determine the specific  gravity of electrolysis

    Correct Answer
    A. Determine the specific  gravity of electrolysis
    Explanation
    The hydrometer is used during the charging of a battery to determine the specific gravity of the electrolyte. The specific gravity of the electrolyte is a measure of its density and can indicate the state of charge of the battery. As the battery charges, the specific gravity of the electrolyte increases, indicating that the battery is becoming fully charged. By measuring the specific gravity, the user can determine if the battery is properly charging and if it has reached its full capacity. This helps to ensure that the battery is functioning correctly and can provide accurate information about its charge level.

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  • 9. 

    What is the unit of electric charge?

    • Volt

    • Watt

    • Ampere

    • Coulomb

    Correct Answer
    A. Coulomb
    Explanation
    The unit of electric charge is coulomb. The coulomb is a fundamental unit of charge in the International System of Units (SI). It represents the amount of electric charge transported by a constant current of one ampere in one second. The coulomb is commonly used to measure the quantity of charge in electrical systems and is essential in understanding the behavior of electric currents and electromagnetic interactions.

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  • 10. 

    Which cell is most often used in digital watches ?

    • Voltaic

    • Lithium

    • Mercury

    • Silver oxide

    Correct Answer
    A. Mercury
    Explanation
    Mercury cells are commonly used in digital watches due to their high energy density, long shelf life, and stable voltage output. They provide a reliable power source for digital watch movements, ensuring accurate timekeeping. Additionally, mercury cells are small and lightweight, making them suitable for compact electronic devices like watches.

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  • 11. 

    Which one do you like?

    • Option 1

    • Option 2

    • Option 3

    • Option 4

    Correct Answer
    A. Option 1
  • 12. 

    What is the formula to calculate the mas depositedduring electrolysis

    • M=it  gm

    • M=zit gm

    • M=it/z gm

    • M=z/it gm

    Correct Answer
    A. M=zit gm
    Explanation
    The formula to calculate the mass deposited during electrolysis is M = zit gm. This formula takes into account the charge of the ions (z), the current (i), and the time (t) to determine the amount of mass deposited. The product of z, i, and t gives the total charge passed during electrolysis, which is then multiplied by the molar mass (g/mole) to obtain the mass deposited.

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  • 13. 

    Which is used as an electrolyte in lead acid battery?

    • Hydrochloric acid

    • Ammonium chloride

    • Pottassium hydroxide 

    • Diluted sulphuric acid

    Correct Answer
    A. Diluted sulphuric acid
    Explanation
    Diluted sulfuric acid is used as an electrolyte in lead-acid batteries. This is because sulfuric acid dissociates into hydrogen ions (H+) and sulfate ions (SO4^2-) in solution, allowing for the flow of electric current. The hydrogen ions participate in the redox reactions that occur during the charging and discharging of the battery, while the sulfate ions help maintain electrical neutrality. Additionally, sulfuric acid is able to provide the necessary acidity for the reactions to occur efficiently.

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  • 14. 

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

    • Voltage become zero

    • Become open circuit 

    • Will get short circuited

    • No effect will function normally

    Correct Answer
    A. Will get short circuited
    Explanation
    If one cell is connected with reverse polarity in a parallel combination circuit, it means that the positive terminal of one cell is connected to the negative terminal of the other cell. This creates a short circuit because the current flows in the opposite direction through the cells, causing a high amount of current to flow between them. As a result, the cells will get short-circuited, which can lead to damage or malfunctioning of the circuit.

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  • 15. 

    What is the out put voltage of lithium cell?

    • 1.2v

    • 1.5v

    • 1.8v

    • 2.5v

    Correct Answer
    A. 2.5v
    Explanation
    The output voltage of a lithium cell is typically around 3.7 volts. However, it is important to note that lithium cells can come in various voltages depending on their specific chemistry and design. Therefore, it is incorrect to state that the output voltage of a lithium cell is 2.5 volts.

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  • 16. 

    Which material is used to make negative plates in lead acid battery?

    • Lead dioxide

    • Sponge lead

    • Lead peroxide

    • Lead sulphate

    Correct Answer
    A. Sponge lead
    Explanation
    Sponge lead is used to make negative plates in a lead-acid battery. The negative plates in a lead-acid battery are made from a porous and spongy form of lead, known as sponge lead. This material allows for a larger surface area and increased contact with the electrolyte, which enhances the battery's performance and efficiency. Sponge lead is chosen for its ability to efficiently store and release electrical energy during the battery's charging and discharging cycles.

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  • 17. 

    Which technique is used  to control the corrosion of metal surface?

    • Anodic  protection

    • Cathodic protection

    • Electrolytic protection

    • Electrotatic protection

    Correct Answer
    A. Cathodic protection
    Explanation
    Cathodic protection is a technique used to control the corrosion of metal surfaces. It involves making the metal surface the cathode of an electrochemical cell, which results in the reduction of corrosion by supplying electrons to the metal surface. This technique is commonly used in industries such as oil and gas, maritime, and infrastructure to protect metal structures from corrosion caused by environmental factors such as moisture and saltwater.

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  • 18. 

    Which electrolyte used to carbon zinc dry cells?

    • Dilute sulphuric acid

    • Ammonium chloride

    • Pottassium hydroxide

    • Concentrated hydrochloric acid

    Correct Answer
    A. Ammonium chloride
    Explanation
    Ammonium chloride is used as an electrolyte in carbon zinc dry cells. It helps to facilitate the flow of electrons between the zinc anode and the carbon cathode, allowing the cell to generate electrical energy. Ammonium chloride also helps to prevent the build-up of zinc oxide on the anode, which can hinder the cell's performance. Therefore, ammonium chloride is the correct answer for the electrolyte used in carbon zinc dry cells.

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  • 19. 

    What i s the effect on out put power with respect to temperature in solar cells?

    • No effect change in temperature

    • Increase with increase in temperature

    • Decrease with increase in temperature

    • Decrease with decrease in temperature

    Correct Answer
    A. Decrease with decrease in temperature
    Explanation
    The output power of solar cells decreases with a decrease in temperature. This is because as the temperature decreases, the efficiency of the solar cells decreases, resulting in a lower output power.

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  • 20. 

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

    • Elect of current  rating

    • Selection of charging time

    • Selection of voltage range

    • Selection of charging method

    Correct Answer
    A. Elect of current  rating
    Explanation
    The function of the fine selector switch in a battery charger is to select the desired current rating for charging the battery. This switch allows the user to choose the appropriate current level based on the battery's specifications and charging requirements. By selecting the correct current rating, the charger can provide the optimal charging current to ensure efficient and safe charging of the battery.

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  • 21. 

    What is the out come at the positive plate,after the chemical reaction in lead acid battery during charging

    • Sponge lead

    • Lead peroxide

    • Lead sulphate 

    • Lead slphate+water

    Correct Answer
    A. Lead peroxide
    Explanation
    During the charging process of a lead-acid battery, a chemical reaction occurs at the positive plate. This reaction involves the conversion of lead dioxide (PbO2) into lead peroxide (PbO4), which is the correct answer. Lead peroxide is formed as a result of the charging process and is essential for the battery's functionality. It helps in the conversion of electrical energy into chemical energy, allowing the battery to store and release electricity efficiently.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 30, 2020
    Quiz Created by
    Vishnu V
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