Neets Quiz 1 MCQ With Answers

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  • 1/41 Questions

    Which of the following is the purpose of an electrical cell?  

    • To change mechanical energy to electrical energy
    • To change chemical energy to electrical energy
    • To change electrical energy to mechanical energy
    • To change electrical energy to chemical energy
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Neets Quiz 1 MCQ With Answers - Quiz

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  • 2. 

    What are the three basic parts of a cell?

    • Electrodes, electrolyte, container

    • Electrodes, acid, water

    • Anode, cathode, ions

    • Anode, load, depolarizer

    Correct Answer
    A. Electrodes, electrolyte, container
    Explanation
    The three basic parts of a cell are electrodes, electrolyte, and container. Electrodes are the conductive materials that allow the flow of electrons in and out of the cell. The electrolyte is a solution that contains ions and facilitates the movement of these ions between the electrodes. The container holds the electrodes and electrolyte together, providing a physical structure for the cell.

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  • 3. 

    What term is given to the process that takes place inside a cell?

    • Electromagnetic action

    • Piezoelectric action

    • Electromechanical action

    • Electrochemical action

    Correct Answer
    A. Electrochemical action
    Explanation
    Electrochemical action refers to the process that occurs inside a cell. This term describes the chemical reactions and electrical currents that take place within a cell, such as in a battery or in biological cells. It involves the movement of ions and electrons, leading to the conversion of chemical energy into electrical energy or vice versa.

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  • 4. 

    With respect to recharging a primary or secondary cell, of the following statements, which one is correct?

    • The secondary cell can be recharged by passing current through it in the proper direction

    • The primary cell can be recharged by passing current through it in the proper direction

    • The secondary cell can only be recharged by changing the electrodes

    • The primary cell can only be recharged by changing the electrolyte

    Correct Answer
    A. The secondary cell can only be recharged by changing the electrodes
  • 5. 

    What causes negative ions to be attracted to the cathode of a primary cell while the cell is discharging?

    • A negative charge caused by a loss of electrons

    • A negative charge caused by an excess of electrons

    • A positive charge caused by a loss of electrons

    • A positive charge caused by an excess of electrons

    Correct Answer
    A. A positive charge caused by a loss of electrons
    Explanation
    When a primary cell is discharging, the cathode becomes positively charged due to a loss of electrons. Negative ions are attracted to the cathode because opposite charges attract each other. Therefore, the positive charge caused by a loss of electrons is what causes negative ions to be attracted to the cathode during the discharge of a primary cell.

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  • 6. 

    What causes hydrogen to be attracted to the anode of a primary cell when the cell is discharging?

    • A negative charge caused by a loss of electrons

    • A negative charge caused by an excess of electrons

    • A positive charge caused by a loss of electrons

    • A positive charge caused by an excess of electrons

    Correct Answer
    A. A negative charge caused by an excess of electrons
    Explanation
    When a primary cell is discharging, the anode becomes negatively charged due to an excess of electrons. This negative charge attracts the positively charged hydrogen ions, causing the hydrogen to be attracted to the anode.

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  • 7. 

    What causes the cathode to be "eaten away" in the primary cell while the cell is discharging?

    • The material of the cathode combines with the negative ions to form a new substance.

    • The material of the cathode dissolves in the electrolyte.

    • The material of the cathode leaves the negative terminal of the cell and goes through the load to the anode.

    • Bacteria in the electrolyte erodes the material in the cathode.

    Correct Answer
    A. The material of the cathode dissolves in the electrolyte.
    Explanation
    In a primary cell, the cathode is typically made of a material that is reactive with the electrolyte. As the cell discharges, the chemical reactions at the cathode cause the material to dissolve in the electrolyte. This dissolution of the cathode material is what causes the cathode to be "eaten away" or corroded during the discharge process.

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  • 8. 

    The primary cell is completely discharged when which of the following conditions exists?

    • The cathode is completely eaten away

    • The active ingredient in the electrolyte is used up

    • The voltage of the cell is reduced to zero

    • Each of the above

    Correct Answer
    A. Each of the above
    Explanation
    The correct answer is "Each of the above". This means that all of the conditions mentioned in the options can cause the primary cell to be completely discharged. If the cathode is completely eaten away, there will be no more material available for the cell to generate electricity. If the active ingredient in the electrolyte is used up, the chemical reaction that produces electricity will no longer occur. And if the voltage of the cell is reduced to zero, it means that there is no more electrical potential difference to drive the flow of electrons. Therefore, all of these conditions can lead to a completely discharged primary cell.

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  • 9. 

    In a zinc-carbon primary cell, what is the function of the carbon electrode?

    • To generate electrons

    • To supply a return path for current

    • To speed electrolysis

    • To collect hydrogen

    Correct Answer
    A. To supply a return path for current
    Explanation
    The function of the carbon electrode in a zinc-carbon primary cell is to supply a return path for current. When the cell is in use, the carbon electrode allows the flow of electrons from the zinc electrode to the electrolyte, completing the circuit and allowing the current to flow. Without the carbon electrode, the current would not be able to return to complete the circuit, and the cell would not be able to function properly.

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  • 10. 

    The lead-acid cell is an example of which of the following types of cells?

    • The dry cell

    • The voltaic cell

    • The primary cell

    • The secondary cell

    Correct Answer
    A. The secondary cell
    Explanation
    The lead-acid cell is an example of a secondary cell because it can be recharged and reused multiple times. Unlike primary cells, which are disposable and cannot be recharged, secondary cells can be regenerated by passing an electric current through them in the opposite direction of discharge. The lead-acid cell is commonly used in automotive batteries and other applications that require a reliable and rechargeable power source.

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  • 11. 

    In a fully charged lead-acid cell, what is the composition of the anode, cathode, and electrolyte respectively?

    • Zinc, carbon, and water

    • Carbon, lead, sulfuric acid and water

    • Lead peroxide, sponge lead, sulfuric acid, and water

    • Nickel, cadmium, potassium hydroxide, and water

    Correct Answer
    A. Lead peroxide, sponge lead, sulfuric acid, and water
    Explanation
    The correct answer is "Lead peroxide, sponge lead, sulfuric acid, and water." In a fully charged lead-acid cell, the anode is made of lead peroxide, the cathode is made of sponge lead, and the electrolyte is sulfuric acid and water. This composition allows for the chemical reactions necessary for the cell to function properly. Zinc, carbon, and water are not the correct components for a fully charged lead-acid cell. Carbon, lead, sulfuric acid, and water are also not the correct components. Nickel, cadmium, potassium hydroxide, and water are the components of a nickel-cadmium battery, not a lead-acid cell.

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  • 12. 

    Which of the following actions will recharge a secondary cell?

    • Adding more water to the electrolyte

    • Adding more active ingredient to the electrolyte

    • Connecting the negative terminal of a voltage source to the cathode of the cell and the positive terminal of the voltage source to the anode of the cell

    • Connecting the negative terminal of a voltage source to the anode of the cell and the positive terminal of the voltage source to the cathode of the cell

    Correct Answer
    A. Connecting the negative terminal of a voltage source to the cathode of the cell and the positive terminal of the voltage source to the anode of the cell
    Explanation
    Connecting the negative terminal of a voltage source to the cathode of the cell and the positive terminal of the voltage source to the anode of the cell will recharge a secondary cell. This is because during the recharge process, the flow of electrons is reversed, causing the chemical reactions in the cell to be reversed as well. This allows the cell to store energy again, replenishing its charge.

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  • 13. 

    When all the lead sulfate in a lead-acid cell is converted to sulfuric acid, lead peroxide, and sponge lead, what is the condition of the cell?

    • Fully charged

    • Discharged

    • Sulfated

    • Unusable

    Correct Answer
    A. Fully charged
    Explanation
    When all the lead sulfate in a lead-acid cell is converted to sulfuric acid, lead peroxide, and sponge lead, it indicates that the cell is fully charged. This conversion process is a result of the charging process, where electrical energy is used to convert the lead sulfate back into its original components. Therefore, when this conversion is complete, it signifies that the cell has reached its maximum capacity and is ready for use.

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  • 14. 

    Polarization has what effects on an electrical cell?

    • Decreases internal resistance, thereby increasing the output voltage

    • Decreases internal resistance, thereby decreasing the output voltage

    • Increases internal resistance, thereby increasing the output voltage

    • Increases internal resistance, thereby decreasing the output voltage

    Correct Answer
    A. Increases internal resistance, thereby decreasing the output voltage
    Explanation
    When a cell is polarized, it means that the chemical reactions within the cell have caused a buildup of charge on the electrodes, creating an imbalance. This buildup of charge increases the internal resistance of the cell, making it more difficult for current to flow. As a result, the output voltage of the cell decreases because the voltage across the internal resistance also decreases. Therefore, the correct answer is that polarization increases the internal resistance, thereby decreasing the output voltage.

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  • 15. 

    Which of the following methods is used to control polarization in a cell?

    • Venting the cell

    • Heating the electrolyte

    • Adding mercury to the electrode material

    • Using an electrolyte that absorbs oxygen

    Correct Answer
    A. Venting the cell
    Explanation
    Venting the cell is a method used to control polarization in a cell because it allows the release of gas buildup, which can cause polarization. When a cell operates, gas bubbles can form at the electrodes, creating a barrier that hinders the flow of current. Venting the cell provides a way for these gas bubbles to escape, preventing polarization and maintaining efficient cell performance.

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  • 16. 

    Which of the following is caused by local action in a cell?

    • Shelf life is reduced

    • Hydrogen is generated in large quantities

    • Impurities rise to the surface of the electrolyte

    • Mercury coating of the zinc electrode is worn away

    Correct Answer
    A. Impurities rise to the surface of the electrolyte
    Explanation
    When local action occurs in a cell, impurities rise to the surface of the electrolyte. Local action refers to the occurrence of small-scale chemical reactions within the cell that do not contribute to the overall functioning of the cell. These reactions can cause the formation of impurities, which then accumulate and rise to the surface of the electrolyte. This can lead to reduced efficiency and performance of the cell over time.

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  • 17. 

    In a dry cell, what is the consistency of the electrolyte?

    • Solid

    • Liquid

    • Paste

    • Powder

    Correct Answer
    A. Paste
    Explanation
    In a dry cell, the consistency of the electrolyte is paste. This means that the electrolyte is in a semi-solid state, with a thick and sticky texture. The paste consistency allows for better contact between the electrolyte and the electrodes, ensuring efficient flow of ions and electricity within the cell. It also helps to prevent leakage and maintain the stability of the cell.

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  • 18. 

    What serves as the cathode in a common type of dry cell?

    • Carbon electrode

    • Zinc container

    • Steel cover

    • Nickel terminal

    Correct Answer
    A. Zinc container
    Explanation
    In a common type of dry cell, the zinc container serves as the cathode. The cathode is the electrode where reduction reactions occur during the cell's operation. In this type of dry cell, the zinc container acts as the negative terminal and is the site of the reduction reaction, where zinc atoms gain electrons. This reaction provides the necessary flow of electrons for the cell to generate electrical energy. Therefore, the zinc container is the correct answer for the cathode in a common type of dry cell.

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  • 19. 

    How should the dry cell be stored to obtain maximum shelf life?

    • In a dark container

    • In a heated cabinet

    • In a ventilated area

    • In a refrigerated space

    Correct Answer
    A. In a refrigerated space
    Explanation
    Storing the dry cell in a refrigerated space helps to maximize its shelf life. Low temperatures slow down the chemical reactions that occur within the cell, reducing the rate of self-discharge. This helps to preserve the energy stored in the cell for a longer period of time. Additionally, refrigeration helps to keep the cell cool and prevents it from overheating, which can cause damage to the cell and reduce its lifespan. Therefore, storing the dry cell in a refrigerated space is the best option for obtaining maximum shelf life.

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  • 20. 

    The blotting paper in a dry cell serves which of the following purposes?

    • Separates the paste from the zinc

    • Permits the electrolyte from the paste to filter through to the zinc slowly

    • Both 1 and 2 above

    • Keeps the electrolyte dry

    Correct Answer
    A. Separates the paste from the zinc
    Explanation
    The blotting paper in a dry cell serves the purpose of separating the paste from the zinc. This is important because the paste, which contains the electrolyte, needs to be in contact with the zinc in order to generate the chemical reactions that produce electricity. However, direct contact between the paste and the zinc would cause the reactions to occur too quickly and uncontrollably. The blotting paper acts as a barrier, allowing the electrolyte to filter through slowly and maintain a steady and controlled flow of reactions.

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  • 21. 

    Of the following characteristics, which one describes the mercury cell?

    • It is physically one of the largest cells

    • It has a very stable output voltage

    • It is designed to be rechargeable

    • It produces a large amount of current but has a short shelf life

    Correct Answer
    A. It has a very stable output voltage
    Explanation
    The mercury cell is described as having a very stable output voltage. This means that the voltage it produces remains consistent over time, regardless of changes in the load or other external factors. This characteristic is advantageous in applications where a stable power supply is required, such as in certain medical devices or precision instruments.

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  • 22. 

    Which of the following describes the shorting of a cell?

    • Decreasing the length of a cell

    • Connecting the anode and cathode together without a load

    • Using the cell below its full potential

    • Providing a recharge voltage that is not sufficient to recharge the cell

    Correct Answer
    A. Connecting the anode and cathode together without a load
    Explanation
    Shorting of a cell refers to the act of connecting the anode and cathode terminals of the cell directly without any load in the circuit. This creates a low resistance path for the current to flow, bypassing the intended load. As a result, a large amount of current is drawn from the cell, which can lead to overheating, damage, or even explosion of the cell. Therefore, shorting a cell is considered unsafe and can result in the degradation or failure of the cell.

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  • 23. 

    What is/are the advantages(s) of using a manganese-dioxide-alkaline- zinc cell over the zinc-carbon cell?

    • Better voltage stability

    • Longer storage life

    • Operates over a wide temperature range

    • All the above

    Correct Answer
    A. All the above
    Explanation
    The advantages of using a manganese-dioxide-alkaline-zinc cell over the zinc-carbon cell include better voltage stability, longer storage life, and the ability to operate over a wide temperature range. The manganese-dioxide-alkaline-zinc cell provides a more stable voltage output, ensuring consistent performance. It also has a longer storage life, meaning it can be stored for longer periods without losing its charge. Additionally, it can operate effectively in a wide range of temperatures, making it more versatile in various environments.

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  • 24. 

    What is the common name for manganesedioxide- alkaline-zinc cell?

    • Alkaline cell

    • Long-life cell

    • Moz cell

    • Manganese-dioxide cell

    Correct Answer
    A. Alkaline cell
    Explanation
    The common name for a manganese dioxide-alkaline zinc cell is an alkaline cell. This type of cell is commonly used in household devices such as remote controls, flashlights, and toys. It is known for its long-lasting power and ability to provide a steady voltage output. The alkaline cell gets its name from the alkaline electrolyte used in the cell, which is typically potassium hydroxide.

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  • 25. 

    Which of the following factors should be considered when selecting a primary cell as a power source?

    • Power requirement

    • Type of electrolyte used

    • Container material

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    When selecting a primary cell as a power source, all of the factors mentioned should be considered. The power requirement is important to ensure that the cell can provide enough power for the intended application. The type of electrolyte used is significant as it affects the cell's performance and lifespan. The container material is also crucial as it determines the cell's durability and compatibility with the environment. Considering all of these factors is necessary to make an informed decision and choose the most suitable primary cell for the specific power needs.

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  • 26. 

    Of the following types of cells, which one is a primary cell?

    • Nickel cadmium

    • Silver zinc

    • Lithium organic

    • Silver cadmium

    Correct Answer
    A. Lithium organic
  • 27. 

    Which of the following is/are the difference(s) in the construction of a NICAD cell as compared to a lead-acid cell?

    • The electrolyte used

    • The material of the anode

    • The material of the cathode

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    The construction of a NICAD cell differs from a lead-acid cell in all three aspects mentioned. The electrolyte used in a NICAD cell is typically potassium hydroxide, while a lead-acid cell uses sulfuric acid. The material of the anode in a NICAD cell is usually made of cadmium, whereas a lead-acid cell has a lead anode. Similarly, the material of the cathode differs as well, with a NICAD cell using nickel oxide and a lead-acid cell using lead dioxide. Therefore, all of the above options are correct.

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  • 28. 

    What is the most common use of a silverzinc cell?

    • Flashlight batteries

    • Automobile batteries

    • Aircraft storage batteries

    • Emergency equipment batteries

    Correct Answer
    A. Emergency equipment batteries
    Explanation
    Silver-zinc cells are commonly used in emergency equipment batteries. These batteries are designed to provide reliable power during critical situations such as power outages or emergencies. They offer high energy density, long shelf life, and good performance at high temperatures. Due to these characteristics, silver-zinc cells are suitable for powering emergency equipment like flashlights, radios, medical devices, and emergency backup systems.

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  • 29. 

    In addition to the nickel-cadmium and silver-zinc cells, which of the following cells uses potassium hydroxide as the active ingredient in the electrolyte?

    • Lead-acid cell

    • Silver-cadmium

    • Lithium-inorganic cell

    • Magnesium-manganese dioxide cell

    Correct Answer
    A. Silver-cadmium
    Explanation
    The correct answer is Silver-cadmium. Silver-cadmium cells use potassium hydroxide as the active ingredient in the electrolyte.

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  • 30. 

    What is the minimum number of cells necessary to form a battery?

    • One

    • Two

    • Three

    • Four

    Correct Answer
    A. One
    Explanation
    A battery is a device that converts chemical energy into electrical energy. It consists of one or more cells, where each cell contains two electrodes (a positive and a negative) and an electrolyte. When a cell is connected to a circuit, a chemical reaction occurs within the cell, causing electrons to flow from the negative electrode to the positive electrode, creating an electrical current. Therefore, a minimum of one cell is necessary to form a battery.

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  • 31. 

    What is the first step in performing maintenance on a secondary-cell battery?

    • Check the level of the electrolyte

    • Check the technical manual for information on the specific type of battery

    • Check the terminals for cleanliness and good electrical connection

    • Check the battery case for cleanliness and evidence of damage

    Correct Answer
    A. Check the technical manual for information on the specific type of battery
    Explanation
    The first step in performing maintenance on a secondary-cell battery is to check the technical manual for information on the specific type of battery. This is important because different types of batteries may have different maintenance requirements and procedures. The technical manual will provide guidance on how to properly maintain and care for the specific type of battery being used.

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  • 32. 

    When a hydrometer is used to check the specific gravity of the electrolyte in a battery, to what level should the electrolyte be drawn?

    • Enough to just wet the float

    • Enough so the float will rise without entering the suction bulb

    • Enough so the top one-third of the float will rise into the suction bulb

    • Enough so the float is completely covered by the electrolyte

    Correct Answer
    A. Enough so the float will rise without entering the suction bulb
    Explanation
    The correct answer is "Enough so the float will rise without entering the suction bulb." This is because the hydrometer measures the specific gravity of the electrolyte by measuring the buoyancy of the float. If the float enters the suction bulb, it may affect the accuracy of the reading. Therefore, the electrolyte should be drawn to a level where the float can rise freely without entering the suction bulb.

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  • 33. 

    To flush a hydrometer, which of the following liquids should be used?

    • Sulfuric acid

    • Salt water

    • Fresh water

    • A solution of baking soda and water

    Correct Answer
    A. Fresh water
    Explanation
    To flush a hydrometer, fresh water should be used. This is because fresh water is a neutral liquid that does not contain any chemicals or substances that could potentially contaminate the hydrometer or affect its accuracy. Using sulfuric acid or salt water could be corrosive and damage the hydrometer, while a solution of baking soda and water could introduce foreign particles or residues that may interfere with the readings. Therefore, fresh water is the safest and most suitable option for flushing a hydrometer.

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  • 34. 

    If the electrolyte level in a battery is low, what should be added to the electrolyte to bring it to the proper level?

    • Tap water

    • Sulfuric acid

    • Potassium hydroxide

    • Distilled water

    Correct Answer
    A. Distilled water
    Explanation
    Distilled water should be added to the electrolyte to bring it to the proper level. This is because distilled water is pure and does not contain any impurities or minerals that could affect the chemical reactions happening in the battery. Adding tap water, sulfuric acid, or potassium hydroxide could introduce impurities or alter the chemical composition of the electrolyte, which could negatively affect the battery's performance.

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  • 35. 

    Which one of the following safety precautions for batteries is NOT correct?

    • Terminals should be electrically connected together before transporting a battery

    • Care should be taken to prevent the spilling of electrolyte

    • Smoking, open flames, and electrical sparks are prohibited around charging batteries

    • Protective clothing, such as rubber apron, rubber gloves, and face shield, should be worn when working on batteries

    Correct Answer
    A. Terminals should be electrically connected together before transporting a battery
  • 36. 

    If electrolyte comes in contact with the skin, what first aid treatment should be given immediately to the affected area?

    • Cover with petroleum jelly

    • Wrap with a sterile bandage

    • Apply an antiseptic lotion

    • Flush with fresh water

    Correct Answer
    A. Flush with fresh water
    Explanation
    When electrolyte comes in contact with the skin, the immediate first aid treatment that should be given is to flush the affected area with fresh water. This is because fresh water helps to dilute and remove the electrolyte from the skin, reducing the risk of further damage or injury. Flushing with fresh water can help to minimize the potential harmful effects of the electrolyte on the skin and prevent any potential complications.

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  • 37. 

    A battery with a capacity of 600 ampere-hours should provide 3 amperes for a maximum of how many hours?

    • 100 hr

    • 200 hr

    • 300 hr

    • 600 hr

    Correct Answer
    A. 200 hr
    Explanation
    A battery with a capacity of 600 ampere-hours should provide 3 amperes for a maximum of 200 hours. This can be calculated by dividing the battery capacity (600) by the current (3). The result is 200, indicating that the battery can provide 3 amperes for 200 hours before it is completely drained.

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  • 38. 

    A battery is rated according to a 20-hour rate of discharge at 300 ampere-hours. Which of the following currents is the maximum current that will allow the battery to deliver its rated capacity?

    • 15 amperes

    • 20 amperes

    • 25 amperes

    • 30 amperes

    Correct Answer
    A. 15 amperes
    Explanation
    A battery is rated according to a 20-hour rate of discharge at 300 ampere-hours. This means that the battery is designed to deliver its rated capacity of 300 ampere-hours over a period of 20 hours. To calculate the maximum current that will allow the battery to deliver its rated capacity, we divide the rated capacity (300 ampere-hours) by the discharge time (20 hours). This gives us a current of 15 amperes. Therefore, the maximum current that will allow the battery to deliver its rated capacity is 15 amperes.

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  • 39. 

    Which of the following types of routine charges follows the nameplate data in restoring a battery to its charged condition during the ordinary cycle of operation?

    • Initial

    • Floating

    • Normal

    • Fast

    Correct Answer
    A. Normal
    Explanation
    Normal routine charges follow the nameplate data in restoring a battery to its charged condition during the ordinary cycle of operation. This means that the charging process is carried out according to the manufacturer's specifications and recommendations for the specific battery. The normal routine charge is designed to ensure that the battery is restored to its optimal charged state without causing any damage or overcharging.

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  • 40. 

    If violent gassing occurs during the charging of a battery, which of the following actions should be taken?

    • Increase the room ventilation

    • Decrease the room temperature

    • Increase the charging rate

    • Decrease the charging rate

    Correct Answer
    A. Increase the room ventilation
    Explanation
    Increasing the room ventilation is the appropriate action to take if violent gassing occurs during the charging of a battery. This is because violent gassing indicates that there is excessive gas buildup, which can be dangerous if not properly ventilated. Increasing the room ventilation helps to disperse the gas and prevent any potential hazards. Decreasing the room temperature, increasing or decreasing the charging rate are not directly related to addressing the issue of violent gassing.

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  • 41. 

    If a battery is being charged at the proper rate, which, if any of the following types of gassing should occur?

    • Steady gassing

    • Intermittent gassing

    • Violent gassing

    • None

    Correct Answer
    A. Steady gassing
    Explanation
    When a battery is being charged at the proper rate, steady gassing may occur. Gassing is the process in which hydrogen and oxygen gases are released from the electrolyte in the battery. Steady gassing refers to a controlled and consistent release of these gases, which is normal during the charging process. It indicates that the battery is functioning correctly and the charging rate is appropriate. Intermittent or violent gassing would suggest an issue with the charging process, such as overcharging or a faulty battery.

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  • Mar 21, 2023
    Quiz Edited by
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  • Jun 25, 2011
    Quiz Created by
    Blogblog1968

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