MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Utilization Of Electrical Energy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Complete the cell reaction on the positive electrode for the lead-acid battery.\(Pb{{O}_{2}}+{{H}_{2}}S{{O}_{4}}+2{{H}^{2}}+2{{e}^{-}}^{\begin{matrix} \text{Discharge} \\ \begin{matrix} \to \\ \leftarrow \\ \text{Charge} \\ \end{matrix} \\ \end{matrix}}\) |
| A. | NaOH + 2H2O |
| B. | 3Pb2SO4 + 2HCl |
| C. | 2Pb2SO4 + 2H2O |
| D. | Pb2O4 + 2SO2 |
| Answer» D. Pb2O4 + 2SO2 | |
| 2. |
A lead-acid battery should NOT be discharged beyond ___________. |
| A. | 3.75 V |
| B. | 2.2 V |
| C. | 1.8 V |
| D. | 5 V |
| Answer» D. 5 V | |
| 3. |
Complete the cell reaction on the positive electrode for the nickel-cadmium battery.\(2NiOOH + 2{H_2}O + 2{e^ - }^{\begin{array}{*{20}{c}} {{\rm{Discharge}}}\\ {\begin{array}{*{20}{c}} \to \\ \leftarrow \\ {{\rm{Charge}}} \end{array}} \end{array}}\) |
| A. | 2Ni(OH)2 + (H2O̅) |
| B. | 3Ni2SO4 + 2HCl |
| C. | Ni2HO2 + 2H2O |
| D. | 2Ni(OH)2 + 2(OH̅) |
| Answer» E. | |
| 4. |
In nickel-cadmium cells, the electrolyte is a mixture of _____. |
| A. | Potassium chloride and deionized water |
| B. | Potassium hydroxide and deionized water |
| C. | Sulphuric acid and water |
| D. | Potassium peroxide and deionized water |
| Answer» C. Sulphuric acid and water | |
| 5. |
Carborundum is another name of |
| A. | Silicon carbide |
| B. | Silicon oxide |
| C. | Calcium carbide |
| D. | Calcium oxide |
| Answer» B. Silicon oxide | |
| 6. |
An electrically insulating material that is used to prevent metallic contact between the positive and negative plates in a cell, but permits the flow of ions between the plates, is ______. |
| A. | cathode |
| B. | negative electrode |
| C. | separator |
| D. | positive electrode |
| Answer» D. positive electrode | |
| 7. |
Active materials of a lead-acid cell are: |
| A. | Lead peroxide, sponge lead and dilute sulfuric acid |
| B. | Lead peroxide and filler caps |
| C. | Lead peroxide and pillar |
| D. | Sponge lead and pillar |
| Answer» B. Lead peroxide and filler caps | |
| 8. |
______ batteries are used in car. |
| A. | Zinc-cadmium |
| B. | Lead-acid |
| C. | Nickel-cadmium |
| D. | Zinc oxide |
| Answer» C. Nickel-cadmium | |
| 9. |
Lead, in case of lead-acid cell, is known as __________. |
| A. | negative passive material |
| B. | negative active material |
| C. | positive passive material |
| D. | positive active material |
| Answer» C. positive passive material | |
| 10. |
In a charged state, the Ni-Cd battery has _____ in the positive electrode and ______ in the negative electrode. |
| A. | cadmium peroxide, nickel |
| B. | Cadmium, Nickel |
| C. | Nickel hydroxide, cadmium oxide |
| D. | Nickel hydroxide, cadmium |
| Answer» E. | |
| 11. |
Complete the cell reaction at negative electrode for the nickel-cadmium battery.\(Cd + 2\left( {O\bar H} \right)\begin{array}{*{20}{c}} {{\rm{Discharge\;}}}\\ {\begin{array}{*{20}{c}} \to \\ \leftarrow \\ {{\rm{Charge\;}}} \end{array}} \end{array}\) |
| A. | 2Ni (OH)2 + Cd (OH)2 |
| B. | 2Ni (OH)2 + H2O + 2e- |
| C. | 2Ni (OH)2 + 2(OH) |
| D. | Cd (OH)2 + 2e- |
| Answer» E. | |
| 12. |
Complete the cell reaction on the negative electrode for the lead-acid battery.\(Pb + {H_2}S{O_4}\begin{array}{*{20}{c}} {{\rm{Discharge}}}\\ {\begin{array}{*{20}{c}} \to \\ \leftarrow \\ {{\rm{Charge}}} \end{array}} \end{array}\) |
| A. | PbSO4 + 2H+ + 2e |
| B. | PbO2 + H2SO4 + 2H+ + 2e |
| C. | PbO2 + H2SO4 |
| D. | 3Pb2SO4 + 2HCl |
| Answer» B. PbO2 + H2SO4 + 2H+ + 2e | |
| 13. |
Complete the overall cell reaction for the lead-acid battery.\(Pb{{O}_{2}}+Pb+2{{H}_{2}}S{{O}_{4}}\begin{matrix} \text{Discharge} \\ \begin{matrix} \to \\ \leftarrow \\ \text{Charge} \\ \end{matrix} \\ \end{matrix}\) |
| A. | 2PbSO4 + 2H2O |
| B. | PbOH4 + 2SO2 |
| C. | 2H2SO4 + 2PbOH |
| D. | 3Pb2SO4 + 2H2O |
| Answer» B. PbOH4 + 2SO2 | |
| 14. |
During the discharge of a lead-acid battery, the terminal voltage drops as there is a drop in __________. |
| A. | electrolyte |
| B. | electrode size |
| C. | temperature |
| D. | discharge rate |
| Answer» E. | |
| 15. |
Batteries operate by converting chemical energy into electrical energy through _____ reactions. |
| A. | chemically neutral |
| B. | electrochemical discharge |
| C. | electromechanical discharge |
| D. | electron discharge |
| Answer» C. electromechanical discharge | |
| 16. |
Batteries are composed of one or more cells, each containing: |
| A. | positive electrode and the negative electrode |
| B. | a neutral electrode, a negative electrode, separator and electrolyte |
| C. | a positive electrode, a negative electrode, separator and electrolyte |
| D. | a positive electrode, ionic electrode, separator and electrolyte |
| Answer» D. a positive electrode, ionic electrode, separator and electrolyte | |
| 17. |
In Ni-Cd batteries ____ is commonly used as an electrolyte. |
| A. | Nickel hydroxide |
| B. | Sodium Chloride |
| C. | potassium hydroxide |
| D. | cadmium peroxide |
| Answer» D. cadmium peroxide | |