Chemical Engineering :: Chemical Engineering Basics-2
- Addition of __________ to steel does not impart hardness.
- Pick out the wrong statement about nucleate boiling.
- Pick out the correct statement about the condensation.
- Which of the following heat treatment processes is used for softening the hardened material?
- Large diameter shafts are manufactured by
- Fatigue strength of a material can not be increased by
- The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
- The difference in the properties of a substance in three states of matter depends upon the
- __________ circuit is most commonly used to measure strain with the help of a strain gauge.
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A.
Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface |
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B.
Surface temperature is greater than the saturation temperature of the liquid |
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C.
Heat transfer from the surface of the liquid is less than that in film boiling |
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D.
The temperature is less than that of film boiling |
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A.
Filmwise condensation gives a lower heat transfer rate than the dropwise condensation |
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B.
Suitable coating or vapour additive is used to promote film wise condensation |
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C.
If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it |
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D.
Reynolds number of condensing liquid is based on its mass flow rate |