Mechanical Engineering Exam > Mechanical Engineering Questions > Assertion (A): Hydrogen cooling is used for h...
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Assertion (A): Hydrogen cooling is used for high capacity electrical generators.
Reason (R): Hydrogen is light and has high thermal conductivity ascompared to air
Reason (R): Hydrogen is light and has high thermal conductivity ascompared to air
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'A'. Can you explain this answer?
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Assertion (A): Hydrogen cooling is used for high capacity electrical g...
Ans. (a) It reduces the cooling systems size.
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Assertion (A): Hydrogen cooling is used for high capacity electrical g...
Assertion (A): Hydrogen cooling is used for high capacity electrical generators.
Reason (R): Hydrogen is light and has high thermal conductivity as compared to air.
The correct answer is option 'A', i.e., both Assertion (A) and Reason (R) are individually true, and Reason (R) is the correct explanation of Assertion (A).
Explanation:
Hydrogen Cooling for High Capacity Electrical Generators:
1. High capacity electrical generators produce a significant amount of heat during operation.
2. To maintain the temperature within acceptable limits and prevent overheating, cooling methods are employed.
3. Hydrogen cooling is one such method used for high capacity electrical generators.
Reasoning for Hydrogen Cooling:
1. Hydrogen is a lightweight gas that possesses excellent cooling properties.
2. Hydrogen has a high thermal conductivity, which means it can efficiently transfer heat away from the generator components.
3. The thermal conductivity of hydrogen is much higher compared to air, which is commonly used for cooling in small generators.
4. Due to its low molecular weight, hydrogen can rapidly absorb heat and carry it away from the generator's core.
5. Hydrogen also has a low density, allowing it to flow easily through the generator's windings and effectively dissipate heat.
6. Additionally, hydrogen has a high specific heat capacity, which means it can absorb a significant amount of heat without experiencing a significant rise in temperature.
7. Another advantage of using hydrogen as a cooling medium is its low viscosity, which reduces the friction losses within the generator.
8. Overall, hydrogen cooling helps in maintaining the temperature and preventing hotspots in high-capacity electrical generators, ensuring their efficient and reliable operation.
Conclusion:
Hydrogen cooling is indeed used for high capacity electrical generators because of its lightweight nature, high thermal conductivity, low viscosity, and high specific heat capacity. These properties enable hydrogen to effectively absorb and dissipate heat, preventing overheating and ensuring the efficient operation of the generators. Therefore, both Assertion (A) and Reason (R) are individually true, and Reason (R) provides a correct explanation for Assertion (A).
Reason (R): Hydrogen is light and has high thermal conductivity as compared to air.
The correct answer is option 'A', i.e., both Assertion (A) and Reason (R) are individually true, and Reason (R) is the correct explanation of Assertion (A).
Explanation:
Hydrogen Cooling for High Capacity Electrical Generators:
1. High capacity electrical generators produce a significant amount of heat during operation.
2. To maintain the temperature within acceptable limits and prevent overheating, cooling methods are employed.
3. Hydrogen cooling is one such method used for high capacity electrical generators.
Reasoning for Hydrogen Cooling:
1. Hydrogen is a lightweight gas that possesses excellent cooling properties.
2. Hydrogen has a high thermal conductivity, which means it can efficiently transfer heat away from the generator components.
3. The thermal conductivity of hydrogen is much higher compared to air, which is commonly used for cooling in small generators.
4. Due to its low molecular weight, hydrogen can rapidly absorb heat and carry it away from the generator's core.
5. Hydrogen also has a low density, allowing it to flow easily through the generator's windings and effectively dissipate heat.
6. Additionally, hydrogen has a high specific heat capacity, which means it can absorb a significant amount of heat without experiencing a significant rise in temperature.
7. Another advantage of using hydrogen as a cooling medium is its low viscosity, which reduces the friction losses within the generator.
8. Overall, hydrogen cooling helps in maintaining the temperature and preventing hotspots in high-capacity electrical generators, ensuring their efficient and reliable operation.
Conclusion:
Hydrogen cooling is indeed used for high capacity electrical generators because of its lightweight nature, high thermal conductivity, low viscosity, and high specific heat capacity. These properties enable hydrogen to effectively absorb and dissipate heat, preventing overheating and ensuring the efficient operation of the generators. Therefore, both Assertion (A) and Reason (R) are individually true, and Reason (R) provides a correct explanation for Assertion (A).
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Assertion (A): Hydrogen cooling is used for high capacity electrical generators.Reason (R): Hydrogen is light and has high thermal conductivity ascompared to aira)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'A'. Can you explain this answer?
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