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Which of the following statement is incorrect?
- a)The greater the pressure difference in throttling the lesser the irreversibility
- b)The primary source of internal irreversibility in power is fluid friction in rotary machines.
- c)The greater the irreversibility, the greater the increase in adiabatic process
- d)The entropy of the universe is continually on the increase.
Correct answer is option 'A'. Can you explain this answer?
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Which of the following statement is incorrect?a)The greater the pressu...
**Explanation:**
To determine which statement is incorrect, let's analyze each statement one by one.
a) **The greater the pressure difference in throttling the lesser the irreversibility:** This statement is incorrect. In throttling processes, the irreversibility is mainly caused by fluid friction and heat transfer between the fluid and surroundings. The pressure difference alone does not directly affect the irreversibility. Therefore, the statement is incorrect.
b) **The primary source of internal irreversibility in power is fluid friction in rotary machines:** This statement is correct. In power systems, such as turbines and pumps, fluid friction in rotary machines is one of the primary sources of internal irreversibility. This friction results in energy losses and decreases the overall efficiency of the system.
c) **The greater the irreversibility, the greater the increase in adiabatic process:** This statement is correct. In an adiabatic process, no heat transfer occurs between the system and its surroundings. Irreversibilities, such as fluid friction and heat transfer, lead to energy losses and decrease the efficiency of the process. Therefore, the greater the irreversibility, the greater the decrease in efficiency.
d) **The entropy of the universe is continually on the increase:** This statement is correct. According to the second law of thermodynamics, the entropy of an isolated system (such as the universe) always increases or remains constant, but it never decreases. This means that the overall disorder or randomness of the universe is continuously increasing over time.
Based on the analysis, statement a) is incorrect. The pressure difference alone does not directly affect the irreversibility in throttling processes. Other factors, such as fluid friction and heat transfer, play a more significant role in causing irreversibility.
To determine which statement is incorrect, let's analyze each statement one by one.
a) **The greater the pressure difference in throttling the lesser the irreversibility:** This statement is incorrect. In throttling processes, the irreversibility is mainly caused by fluid friction and heat transfer between the fluid and surroundings. The pressure difference alone does not directly affect the irreversibility. Therefore, the statement is incorrect.
b) **The primary source of internal irreversibility in power is fluid friction in rotary machines:** This statement is correct. In power systems, such as turbines and pumps, fluid friction in rotary machines is one of the primary sources of internal irreversibility. This friction results in energy losses and decreases the overall efficiency of the system.
c) **The greater the irreversibility, the greater the increase in adiabatic process:** This statement is correct. In an adiabatic process, no heat transfer occurs between the system and its surroundings. Irreversibilities, such as fluid friction and heat transfer, lead to energy losses and decrease the efficiency of the process. Therefore, the greater the irreversibility, the greater the decrease in efficiency.
d) **The entropy of the universe is continually on the increase:** This statement is correct. According to the second law of thermodynamics, the entropy of an isolated system (such as the universe) always increases or remains constant, but it never decreases. This means that the overall disorder or randomness of the universe is continuously increasing over time.
Based on the analysis, statement a) is incorrect. The pressure difference alone does not directly affect the irreversibility in throttling processes. Other factors, such as fluid friction and heat transfer, play a more significant role in causing irreversibility.
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Which of the following statement is incorrect?a)The greater the pressure difference in throttling the lesser the irreversibilityb)The primary source of internal irreversibility in power is fluid friction in rotary machines.c)The greater the irreversibility, the greater the increase in adiabatic processd)The entropy of the universe is continually on the increase.Correct answer is option 'A'. Can you explain this answer?
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Which of the following statement is incorrect?a)The greater the pressure difference in throttling the lesser the irreversibilityb)The primary source of internal irreversibility in power is fluid friction in rotary machines.c)The greater the irreversibility, the greater the increase in adiabatic processd)The entropy of the universe is continually on the increase.Correct 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 Which of the following statement is incorrect?a)The greater the pressure difference in throttling the lesser the irreversibilityb)The primary source of internal irreversibility in power is fluid friction in rotary machines.c)The greater the irreversibility, the greater the increase in adiabatic processd)The entropy of the universe is continually on the increase.Correct 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 Which of the following statement is incorrect?a)The greater the pressure difference in throttling the lesser the irreversibilityb)The primary source of internal irreversibility in power is fluid friction in rotary machines.c)The greater the irreversibility, the greater the increase in adiabatic processd)The entropy of the universe is continually on the increase.Correct answer is option 'A'. Can you explain this answer?.
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