A. conduction
B. convection
C. radiation
D. conduction and convection
E. convection and radiation
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Related Mcqs:
- When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by __________________?
- A. conduction B. convection C. radiation D. conduction and convection E. convection and radiation...
- When heat is Transferred by molecular collision, it is referred to as heat transfer by __________________?
- A. conduction B. convection C. radiation D. scattering E. convection and radiation...
- In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by___________________?
- A. convection B. radiation C. conduction D. both convection and conduction E. none of the above...
- The concept of overall coefficient of heat transfer is used in case of heat transfer by________________?
- A. conduction B. convection C. radiation D. conduction and convection E. convection and radiation...
- Heat is transferred by all three modes of transfer, viz, conduction, convection and radiation in _________________?
- A. electric heater B. steam condenser C. melting of ice D. refrigerator condenser coils E. boiler...
- Which of the following is the case of heat transfer by radiation ___________________?
- A. blast furnace B. heating of building C. cooling of parts in furnace D. heat received by a person from fireplace E. all of the above...
- Which of the following is a case of steady state heat transfer ___________________?
- A. I.C. engine B. air preheaters C. heating of building in winter D. all of the above E. none of the above...
- Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by ___________________?
- A. convection B. free convection C. forced convection D. radiation E. radiation and convection...
- In regenerator type heat exchanger, heat transfer takes place by___________________?
- A. direct mixing of hot and cold fluids B. a complete separation between hot and cold fluids C. flow of hot and cold fluids alternately over a surface D. generation of heat again and again E. indirect transfer...
- In free con-vection heat transfer, Nusselt number is function of________________?
- A. Grashoff no. and Reynold no B. Grashoff no and Prandtl no. C. Prandtl no. and Reynold no D. Grashoff no., Prandtl no and Reynold no E. none of the above...
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