Mechanical Engineering : Heat Transfer QUESTIONS AND ANSWERS :: part2 : 1 to 5
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.Film coefficient is defined as Inside diameter of tube |
| Equivalent thickness of film |
| Thermal conductivity Equivalent thickness of film Specific heat x Viscosity |
| Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity |
| Film coefficient x Inside diameter Thermal conductivity |
| none of the above. |
2.Thermal conductivity of wood depends on |
| moisture |
| density |
| temperature |
| all of the above |
| none of the above. |
3.Which of the following is expected to have highest thermal conductivity |
| steam |
| solid ice |
| melting ice |
| water |
| boiling water. |
4.A grey body is one whose absorptivity |
| varies with temperature |
| varies with wavelength of the incident ray |
| is equal to its emissivity |
| does not vary with temperature and. wavelength of the incident ray |
| none of the above. |
5.Emissivity of a white polished body in comparison to a black body is |
| higher |
| lower |
| same |
| depends upon the shape of body |
| none of the above. |
More Heat Transfer QUESTIONS AND ANSWERS available in next pages
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