Basic knowledge on heat transfer |
Report |
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Please tick the correct answers: | |
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What general statements can be made about the heat conduction of a body? | The addition and dissipation of heat of a heat-conducting body also always happens by heat conduction. |
Heat equalisation within a body happens by heat conduction. | |
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With steady heat conduction, the temperature profile can be used to gain lots of information about a body. Which statements are true? | In bodies with unvarying cross-sectional area, the temperature profile is linear in the steady state. |
If heat is conducted from the inside of a cylinder outwards, the temperature drop in the steady state is linear because the heating surface load remains constant. | |
The temperature drop over the length is a measure of the thermal conduction coefficient. if two different substances meet, a bend can be noticed in the temperature profile through the substances. | |
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Which statements about the image are correct? | |
 | Lambda 1 < Lambda 2 < Lambda 3 |
Lambda 2 > Lambda 3 < Lambda 1 | |
Lambda 1 > Lambda 3 > Lambda 2 | |
Lambda 2 > Lambda 1 > Lambda 3 | |
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Which statements about the image are correct? | |
 | If the schematic profile represents the steady state of a temperature profile, then besides temperature another quantity has to be changed over the represented length. |
The schematic curve can represent the steady-state behaviour of a tube cooled on the inside (T2 < T1). | |
