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Consider following parameters:
1. Temperature of the surface
2. Emissivity of the surface
3. Temperature of the air in the room
4. Length and diameter of the pipe
The parameter(s) responsible for loss of heat from a hot pipe surface ina room without fans would include
1. Temperature of the surface
2. Emissivity of the surface
3. Temperature of the air in the room
4. Length and diameter of the pipe
The parameter(s) responsible for loss of heat from a hot pipe surface ina room without fans would include
- a)1 alone
- b)1 and 2
- c)1, 2 and 3
- d)1, 2, 3 and 4
Correct answer is option 'D'. Can you explain this answer?
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Consider following parameters:1. Temperature of the surface2. Emissivi...
Ans. (d) All parameters are responsible for loss of heat from a hot pipe surface.
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Consider following parameters:1. Temperature of the surface2. Emissivi...
The loss of heat from a hot pipe surface in a room without fans can be influenced by various parameters. Let's analyze each parameter to understand their impact on heat loss.
1. Temperature of the surface:
The temperature of the surface plays a crucial role in heat transfer. According to the laws of thermodynamics, heat transfer occurs from a region of higher temperature to a region of lower temperature. In this case, the hot pipe surface has a higher temperature than the surrounding air, resulting in heat transfer from the pipe to the air.
2. Emissivity of the surface:
Emissivity is a material property that determines how effectively a surface can emit thermal radiation. It is a dimensionless value ranging from 0 to 1, where 0 represents a perfectly reflective surface and 1 represents a perfectly black (ideal) surface. A higher emissivity allows the surface to radiate more heat to the surroundings, increasing the heat loss from the pipe.
3. Temperature of the air in the room:
The temperature of the air in the room affects the heat transfer process. When the air temperature is lower than the surface temperature, heat is transferred from the pipe to the air by convection. The rate of heat transfer by convection depends on the temperature difference between the surface and the air.
4. Length and diameter of the pipe:
The length and diameter of the pipe determine the surface area available for heat transfer. A larger surface area enables more heat to be transferred to the surrounding air. Therefore, a longer and larger diameter pipe would result in higher heat loss compared to a shorter and smaller diameter pipe.
In conclusion, all four parameters mentioned - temperature of the surface, emissivity of the surface, temperature of the air in the room, and length and diameter of the pipe - contribute to the loss of heat from a hot pipe surface in a room without fans. Hence, the correct answer is option 'D' - 1, 2, 3, and 4 are responsible for the heat loss.
1. Temperature of the surface:
The temperature of the surface plays a crucial role in heat transfer. According to the laws of thermodynamics, heat transfer occurs from a region of higher temperature to a region of lower temperature. In this case, the hot pipe surface has a higher temperature than the surrounding air, resulting in heat transfer from the pipe to the air.
2. Emissivity of the surface:
Emissivity is a material property that determines how effectively a surface can emit thermal radiation. It is a dimensionless value ranging from 0 to 1, where 0 represents a perfectly reflective surface and 1 represents a perfectly black (ideal) surface. A higher emissivity allows the surface to radiate more heat to the surroundings, increasing the heat loss from the pipe.
3. Temperature of the air in the room:
The temperature of the air in the room affects the heat transfer process. When the air temperature is lower than the surface temperature, heat is transferred from the pipe to the air by convection. The rate of heat transfer by convection depends on the temperature difference between the surface and the air.
4. Length and diameter of the pipe:
The length and diameter of the pipe determine the surface area available for heat transfer. A larger surface area enables more heat to be transferred to the surrounding air. Therefore, a longer and larger diameter pipe would result in higher heat loss compared to a shorter and smaller diameter pipe.
In conclusion, all four parameters mentioned - temperature of the surface, emissivity of the surface, temperature of the air in the room, and length and diameter of the pipe - contribute to the loss of heat from a hot pipe surface in a room without fans. Hence, the correct answer is option 'D' - 1, 2, 3, and 4 are responsible for the heat loss.
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Consider following parameters:1. Temperature of the surface2. Emissivity of the surface3. Temperature of the air in the room4. Length and diameter of the pipeThe parameter(s) responsible for loss of heat from a hot pipe surface ina room without fans would includea)1 aloneb)1 and 2c)1, 2 and 3d)1, 2, 3 and 4Correct answer is option 'D'. Can you explain this answer?
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Consider following parameters:1. Temperature of the surface2. Emissivity of the surface3. Temperature of the air in the room4. Length and diameter of the pipeThe parameter(s) responsible for loss of heat from a hot pipe surface ina room without fans would includea)1 aloneb)1 and 2c)1, 2 and 3d)1, 2, 3 and 4Correct answer is option 'D'. 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 following parameters:1. Temperature of the surface2. Emissivity of the surface3. Temperature of the air in the room4. Length and diameter of the pipeThe parameter(s) responsible for loss of heat from a hot pipe surface ina room without fans would includea)1 aloneb)1 and 2c)1, 2 and 3d)1, 2, 3 and 4Correct answer is option 'D'. 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 following parameters:1. Temperature of the surface2. Emissivity of the surface3. Temperature of the air in the room4. Length and diameter of the pipeThe parameter(s) responsible for loss of heat from a hot pipe surface ina room without fans would includea)1 aloneb)1 and 2c)1, 2 and 3d)1, 2, 3 and 4Correct answer is option 'D'. Can you explain this answer?.
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ample number of questions to practice Consider following parameters:1. Temperature of the surface2. Emissivity of the surface3. Temperature of the air in the room4. Length and diameter of the pipeThe parameter(s) responsible for loss of heat from a hot pipe surface ina room without fans would includea)1 aloneb)1 and 2c)1, 2 and 3d)1, 2, 3 and 4Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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