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Assertion (A): During the temperature measurement of hot gas in aduct that has relatively cool walls, the temperature indicated by the thermometer will be lower than the true hot gas temperature.
Reason(R): The sensing tip of thermometer receives energy from the hot gas and loses heat to the duct walls. 
  • 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): During the temperature measurement of hot gas in aduct ...
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Assertion (A): During the temperature measurement of hot gas in aduct ...
Assertion (A): During the temperature measurement of hot gas in a duct that has relatively cool walls, the temperature indicated by the thermometer will be lower than the true hot gas temperature.

Reason (R): The sensing tip of the thermometer receives energy from the hot gas and loses heat to the duct walls.

Explanation:
The given assertion and reason are related to the measurement of temperature in a duct where the walls are relatively cool compared to the hot gas flowing inside. Let's analyze the assertion and reason separately to understand their validity.

Assertion (A): During the temperature measurement of hot gas in a duct that has relatively cool walls, the temperature indicated by the thermometer will be lower than the true hot gas temperature.

This assertion is true. When a thermometer is used to measure the temperature of hot gas in a duct with cool walls, heat transfer occurs between the gas, the thermometer, and the duct walls. The temperature indicated by the thermometer will be lower than the true hot gas temperature because some of the heat energy from the gas is transferred to the cooler walls of the duct, resulting in a temperature drop at the point of measurement. This phenomenon is known as heat loss or heat transfer.

Reason (R): The sensing tip of the thermometer receives energy from the hot gas and loses heat to the duct walls.

This reason is also true and it is the correct explanation of Assertion (A). The sensing tip of the thermometer is in contact with the hot gas, and it receives energy from the gas. However, the sensing tip also loses heat to the cooler duct walls due to the temperature difference between the hot gas and the walls. This heat loss from the sensing tip to the duct walls affects the temperature indicated by the thermometer, making it lower than the true hot gas temperature.

Therefore, both the Assertion (A) and Reason (R) are individually true, and Reason (R) is the correct explanation of Assertion (A).
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Assertion (A): During the temperature measurement of hot gas in aduct that has relatively cool walls, the temperature indicated by the thermometer will be lower than the true hot gas temperature.Reason(R): The sensing tip of thermometer receives energy from the hot gas and loses heat to the duct walls.a)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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Assertion (A): During the temperature measurement of hot gas in aduct that has relatively cool walls, the temperature indicated by the thermometer will be lower than the true hot gas temperature.Reason(R): The sensing tip of thermometer receives energy from the hot gas and loses heat to the duct walls.a)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? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Assertion (A): During the temperature measurement of hot gas in aduct that has relatively cool walls, the temperature indicated by the thermometer will be lower than the true hot gas temperature.Reason(R): The sensing tip of thermometer receives energy from the hot gas and loses heat to the duct walls.a)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? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): During the temperature measurement of hot gas in aduct that has relatively cool walls, the temperature indicated by the thermometer will be lower than the true hot gas temperature.Reason(R): The sensing tip of thermometer receives energy from the hot gas and loses heat to the duct walls.a)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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