MCQs on Heat Transfer.

MCQs on Heat Transfer.

MCQs Heat Transfer.

Test

 

1. When fluid is heated, the currents set up may cause mixing of fluid. Such heat transfer is known as,
   1.   Forced Convection
   2.   Natural Convection
   3.   Conduction
   4.   Radiation
2. Solar water heaters, solar cookers, microwave ovens, microwave cookers, sonicator baths etc., are examples of which type of heat transfer mechanism?
   1.   Conduction.
   2.   Convection.
   3.   Radiation.
   4.   All of these.
3. The common source of heat for the evaporators is,
   1.   Steam.
   2.   Hot water.
   3.   Coal.
   4.   Oil bath.
4. Calandria consists of no. of,
   1.   Baffles
   2.   Jackets
   3.   Tubular surfaces
   4.   None of these
5. The amount of radiation mainly depends on,
   1.   Nature of body
   2.   Temperature of body
   3.   Type of Surface of body
   4.   All of the above
6. Stefan Boltzmann law is applicable for heat transfer by,
   1.   Conduction
   2.   Convection
   3.   Radiation
   4.   Conduction & Radiation combined
7. Which of the following has the maximum value of thermal conductivity?
   1.   Aluminum
   2.   Steel
   3.   Brass
   4.   Copper
8. Which of the following has the minimum value of thermal conductivity?
   1.   Wood
   2.   Steel
   3.   Brass
   4.   Copper
9. Fourier law of heat conduction is based on the assumption that,
   1.   Heat Flow through a solid in one dimension
   2.   Heat flow is in steady state
   3.   Both (A) & (B)
   4.   None of the above
10. Heat transfer takes place according to,
    1.   First law of thermodynamics
    2.   Second law of thermodynamics
    3.   Third law of thermodynamics
    4.   Zeroth law of thermodynamics
11. A body whose absorptivity is constant at all wavelengths of radiation, at a given temperature is known as,
    1.   Black Body
    2.   Grey body
    3.   White Body
    4.   Shining body
12. Which of the following, states that the rate of heat flow through a uniform material is proportional to the area and temperature and inversely proportional to the length of the path of flow.
    1.   Newton’s law
    2.   Kick’s law
    3.   Fourier’s law
    4.   Fick’s law
13. Unit of the rate of heat transfer is,
    1.   Joule
    2.   Newton
    3.   Pascal
    4.   Watt
14. When heat is transferred from one particle of a hot body to another by actual motion of the heated particles, it is referred to as heat transfer by.....
    1.   Conduction
    2.   Convection
    3.   Radiation
    4.   Conduction & Radiation combined
15. When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by---
    1.   Conduction
    2.   Convection
    3.   Radiation
    4.   Conduction & Convection combined
16. When heat is transferred by molecular collision, it is referred to as heat transfer by..
    1.   Conduction
    2.   Convection
    3.   Radiation
    4.   Conduction & Radiation combined
17. Heat transfer in liquid and gases takes place by .......
    1.   Conduction
    2.   Convection
    3.   Radiation
    4.   Conduction & Radiation combined
18. Fourier’s Law is applicable to which of the followings,
    1.   Conduction
    2.   Convection
    3.   Radiation
    4.   Conduction & Radiation combined
19. Heat exchangers are not used in which of the following unit operations?
    1.   Size reduction.
    2.   Drying.
    3.   Evaporation.
    4.   Crystallization.
20. According to Fourier’s Law, conduction of heat through a metal wall is,
    1.   Inversely proportional to the temperature difference.
    2.   Proportional to the area of the metal wall.
    3.   Proportional to thickness of the metal wall.
    4.   Proportional to the weight of the metal wall.