- Hey Will Be Marked Together Part A 10 Marks Check True Or False In The Table Below 1 Because Of Higher Densi 1 (95.82 KiB) Viewed 16 times
hey will be marked together. Part A (10 Marks) (Check - "True" or "False in the table below): 1. Because of higher density of solid in general, its mass diffusion coefficient is away higher than that of liquid or gas. (True / False) 2. To cook well done steak, it is a transient heat transfer problem. (True / False) 3. Consider two identical rooms, one with a refrigerator in it and the other without one. If all the doors and windows are closed, the room that contains the refrigerator will be cooler. (True / False) 4. Normally, the co-current heat exchangers have better efficiency than that of the counter- current ones. (True / False 5. For insulation on cylinders or pipes, the heat loss is always smaller with the increase of the thickness of insulator. (True / False) 6. Due higher viscosity, the heat-transfer coefficient of moving liquid food products (e.g. condensed milk, honey, etc.) is generally larger than that of moving water. (True / False) 7. On the skins of heat exchanger tubes (in-side and out-side), there will be 5 layers of resistances to the heat flow, after a long period of use, e.g. after one year. (True / False) 8. Heat transfer coefficients normally depend on fluid velocity, viscosity and diffusivity. (True / False) 9. Air has a good property for heat transfer (True False) 10. The total mass transfer of a gas mixture through solid membrane will increase with higher temperature and pressure. (True/ False)