Mechanical Engineering Exam > Mechanical Engineering Questions > Consider the following statements:1. Under ce...
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Consider the following statements:
1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.
2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.
3. Small diameter tubes are invariably insulated.
4. Economic insulation is based on minimum heat loss from pipe.Of these statements
- a)1 and 3 are correct
- b)2 and 4 are correct
- c)1 and 2 are correct
- d)3 and 4 are correct.
Correct answer is option 'C'. Can you explain this answer?
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Statement 1: Under certain conditions, an increase in thickness of insulation may increase the heat loss from a heated pipe.
Explanation: This statement is correct. The heat loss from a pipe is dependent on various factors including the thickness of insulation. In certain cases, increasing the thickness of insulation can create a larger temperature gradient across the insulation material. This can result in higher heat transfer through conduction, leading to increased heat loss from the pipe.
Statement 2: The heat loss from an insulated pipe reaches a maximum when the outside radius of insulation is equal to the ratio of thermal conductivity to the surface coefficient.
Explanation: This statement is correct. The heat loss from an insulated pipe can be minimized by optimizing the thickness of insulation. It is known that the heat flow through insulation is inversely proportional to the thickness of insulation. However, there is also a point where increasing the thickness beyond a certain limit does not significantly reduce the heat loss. This occurs when the outside radius of insulation is equal to the ratio of thermal conductivity to the surface coefficient. At this point, further increasing the thickness of insulation does not result in a significant reduction in heat loss.
Statement 3: Small diameter tubes are invariably insulated.
Explanation: This statement is incorrect. Small diameter tubes are not invariably insulated. The decision to insulate a tube depends on various factors such as the temperature of the fluid inside the tube, the surrounding environment, and the desired energy efficiency. In some cases, insulation may not be necessary for small diameter tubes if the heat loss is negligible or if the tube is located in a controlled environment.
Statement 4: Economic insulation is based on minimum heat loss from the pipe.
Explanation: This statement is correct. Economic insulation aims to minimize the heat loss from a pipe while considering the cost of insulation materials and installation. The objective is to find the optimal thickness of insulation that provides the desired level of heat conservation at the lowest cost. By minimizing the heat loss, the energy consumption and associated costs can be reduced, making the insulation economically viable.
Therefore, statements 1 and 2 are correct, making the correct answer option 'C' (1 and 2 are correct).
Explanation: This statement is correct. The heat loss from a pipe is dependent on various factors including the thickness of insulation. In certain cases, increasing the thickness of insulation can create a larger temperature gradient across the insulation material. This can result in higher heat transfer through conduction, leading to increased heat loss from the pipe.
Statement 2: The heat loss from an insulated pipe reaches a maximum when the outside radius of insulation is equal to the ratio of thermal conductivity to the surface coefficient.
Explanation: This statement is correct. The heat loss from an insulated pipe can be minimized by optimizing the thickness of insulation. It is known that the heat flow through insulation is inversely proportional to the thickness of insulation. However, there is also a point where increasing the thickness beyond a certain limit does not significantly reduce the heat loss. This occurs when the outside radius of insulation is equal to the ratio of thermal conductivity to the surface coefficient. At this point, further increasing the thickness of insulation does not result in a significant reduction in heat loss.
Statement 3: Small diameter tubes are invariably insulated.
Explanation: This statement is incorrect. Small diameter tubes are not invariably insulated. The decision to insulate a tube depends on various factors such as the temperature of the fluid inside the tube, the surrounding environment, and the desired energy efficiency. In some cases, insulation may not be necessary for small diameter tubes if the heat loss is negligible or if the tube is located in a controlled environment.
Statement 4: Economic insulation is based on minimum heat loss from the pipe.
Explanation: This statement is correct. Economic insulation aims to minimize the heat loss from a pipe while considering the cost of insulation materials and installation. The objective is to find the optimal thickness of insulation that provides the desired level of heat conservation at the lowest cost. By minimizing the heat loss, the energy consumption and associated costs can be reduced, making the insulation economically viable.
Therefore, statements 1 and 2 are correct, making the correct answer option 'C' (1 and 2 are correct).
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Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer?
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Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. 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 Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. 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 Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer?.
Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. 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 Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. 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 Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements:1. Under certain conditions, an increase in thickness of insulation mayincrease the heat loss from a heated pipe.2. The heat loss from an insulated pipe reaches a maximum when theoutside radius of insulation is equal to the ratio of thermalconductivity to the surface coefficient.3. Small diameter tubes are invariably insulated.4. Economic insulation is based on minimum heat loss from pipe.Of these statementsa)1 and 3 are correctb)2 and 4 are correctc)1 and 2 are correctd)3 and 4 are correct.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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