Neets Quiz 1 MCQ With Answers
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- 1.Which of the following is the purpose of an electrical cell?
- A.
To change mechanical energy to electrical energy
- B.
To change chemical energy to electrical energy
- C.
To change electrical energy to mechanical energy
- D.
To change electrical energy to chemical energy
- 2.What are the three basic parts of a cell?
- A.
Electrodes, electrolyte, container
- B.
Electrodes, acid, water
- C.
Anode, cathode, ions
- D.
Anode, load, depolarizer
- 3.What term is given to the process that takes place inside a cell?
- A.
Electromagnetic action
- B.
Piezoelectric action
- C.
Electromechanical action
- D.
Electrochemical action
- 4.With respect to recharging a primary or secondary cell, of the following statements, which one is correct?
- A.
The secondary cell can be recharged by passing current through it in the proper direction
- B.
The primary cell can be recharged by passing current through it in the proper direction
- C.
The secondary cell can only be recharged by changing the electrodes
- D.
The primary cell can only be recharged by changing the electrolyte
- 5.What causes negative ions to be attracted to the cathode of a primary cell while the cell is discharging?
- A.
A negative charge caused by a loss of electrons
- B.
A negative charge caused by an excess of electrons
- C.
A positive charge caused by a loss of electrons
- D.
A positive charge caused by an excess of electrons
- 6.What causes hydrogen to be attracted to the anode of a primary cell when the cell is discharging?
- A.
A negative charge caused by a loss of electrons
- B.
A negative charge caused by an excess of electrons
- C.
A positive charge caused by a loss of electrons
- D.
A positive charge caused by an excess of electrons
- 7.What causes the cathode to be "eaten away" in the primary cell while the cell is discharging?
- A.
The material of the cathode combines with the negative ions to form a new substance.
- B.
The material of the cathode dissolves in the electrolyte.
- C.
The material of the cathode leaves the negative terminal of the cell and goes through the load to the anode.
- D.
Bacteria in the electrolyte erodes the material in the cathode.
- 8.The primary cell is completely discharged when which of the following conditions exists?
- A.
The cathode is completely eaten away
- B.
The active ingredient in the electrolyte is used up
- C.
The voltage of the cell is reduced to zero
- D.
Each of the above
- 9.In a zinc-carbon primary cell, what is the function of the carbon electrode?
- A.
To generate electrons
- B.
To supply a return path for current
- C.
To speed electrolysis
- D.
To collect hydrogen
- 10.The lead-acid cell is an example of which of the following types of cells?
- A.
The dry cell
- B.
The voltaic cell
- C.
The primary cell
- D.
The secondary cell
- 11.In a fully charged lead-acid cell, what is the composition of the anode, cathode, and electrolyte respectively?
- A.
Zinc, carbon, and water
- B.
Carbon, lead, sulfuric acid and water
- C.
Lead peroxide, sponge lead, sulfuric acid, and water
- D.
Nickel, cadmium, potassium hydroxide, and water
- 12.Which of the following actions will recharge a secondary cell?
- A.
Adding more water to the electrolyte
- B.
Adding more active ingredient to the electrolyte
- C.
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
- D.
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
- 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?
- A.
Fully charged
- B.
Discharged
- C.
Sulfated
- D.
Unusable
- 14.Polarization has what effects on an electrical cell?
- A.
Decreases internal resistance, thereby increasing the output voltage
- B.
Decreases internal resistance, thereby decreasing the output voltage
- C.
Increases internal resistance, thereby increasing the output voltage
- D.
Increases internal resistance, thereby decreasing the output voltage
- 15.Which of the following methods is used to control polarization in a cell?
- A.
Venting the cell
- B.
Heating the electrolyte
- C.
Adding mercury to the electrode material
- D.
Using an electrolyte that absorbs oxygen
- 16.Which of the following is caused by local action in a cell?
- A.
Shelf life is reduced
- B.
Hydrogen is generated in large quantities
- C.
Impurities rise to the surface of the electrolyte
- D.
Mercury coating of the zinc electrode is worn away
- 17.In a dry cell, what is the consistency of the electrolyte?
- A.
Solid
- B.
Liquid
- C.
Paste
- D.
Powder
- 18.What serves as the cathode in a common type of dry cell?
- A.
Carbon electrode
- B.
Zinc container
- C.
Steel cover
- D.
Nickel terminal
- 19.How should the dry cell be stored to obtain maximum shelf life?
- A.
In a dark container
- B.
In a heated cabinet
- C.
In a ventilated area
- D.
In a refrigerated space
- 20.The blotting paper in a dry cell serves which of the following purposes?
- A.
Separates the paste from the zinc
- B.
Permits the electrolyte from the paste to filter through to the zinc slowly
- C.
Both 1 and 2 above
- D.
Keeps the electrolyte dry
- 21.Of the following characteristics, which one describes the mercury cell?
- A.
It is physically one of the largest cells
- B.
It has a very stable output voltage
- C.
It is designed to be rechargeable
- D.
It produces a large amount of current but has a short shelf life
- 22.Which of the following describes the shorting of a cell?
- A.
Decreasing the length of a cell
- B.
Connecting the anode and cathode together without a load
- C.
Using the cell below its full potential
- D.
Providing a recharge voltage that is not sufficient to recharge the cell
- 23.What is/are the advantages(s) of using a manganese-dioxide-alkaline- zinc cell over the zinc-carbon cell?
- A.
Better voltage stability
- B.
Longer storage life
- C.
Operates over a wide temperature range
- D.
All the above
- 24.What is the common name for manganesedioxide- alkaline-zinc cell?
- A.
Alkaline cell
- B.
Long-life cell
- C.
Moz cell
- D.
Manganese-dioxide cell
- 25.Which of the following factors should be considered when selecting a primary cell as a power source?
- A.
Power requirement
- B.
Type of electrolyte used
- C.
Container material
- D.
All of the above
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