Heat Transfer MCQ Questions & Answers | Chemical Engineering Page-2 section-6

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6

11.
Vibrations in the tubes of a shell and tube heat exchanger is induced due to the

A. Flow of fluid on the tube and shell sides

B. Oscillations in the flow of shell/tube sides fluid

C. Vibrations transmitted through piping and/or supports due to external reasons

D. All of the above

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12.
Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.

A. 1

B. 7

C. 18

D. 26

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13.
Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids?

A. Dittus-Boeltier equation

B. Sieder-Tate equation

C. Nusselt equation

D. None of these

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14.
Which of the following situations can be approximated to a steady state heat transfer system?

A. A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C

B. 10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless-steel pipe exposed to atmospheric air at 35°C

C. Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C

D. A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

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15.
While the total emissivity of a perfect black body is unity, the same for a real body is

A. 0

B. 1

C. > 1

D. Between 0 and 1

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16.
Pick out the wrong statement:

A. The capacity of an evaporator is reduced by the boiling point elevation

B. Corrosive liquid is normally passed through the tubes in a shell and tube heat exchanger

C. Steam jet ejector is used for vapor compression in a thermal recompression evaporator

D. Heat sensitive materials should be concentrated in high pressure evaporators

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17.
The Graetz number is concerned with the

A. Mass transfer between a gas and a liquid

B. Absorption with chemical reaction

C. Heat transfer in turbulent flow

D. Heat transfer in laminar flow

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Heat Transfer MCQ Questions & Answers | Chemical Engineering

11. Vibrations in the tubes of a shell and tube heat exchanger is induced due to the

Answer & Solution

12. Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.

Answer & Solution

13. Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids?

Answer & Solution

14. Which of the following situations can be approximated to a steady state heat transfer system?

Answer & Solution

15. While the total emissivity of a perfect black body is unity, the same for a real body is

Answer & Solution

16. Pick out the wrong statement:

Answer & Solution

17. The Graetz number is concerned with the

Answer & Solution

Read More Section(Heat Transfer)

11.
Vibrations in the tubes of a shell and tube heat exchanger is induced due to the

12.
Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.

13.
Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids?

14.
Which of the following situations can be approximated to a steady state heat transfer system?

15.
While the total emissivity of a perfect black body is unity, the same for a real body is

16.
Pick out the wrong statement:

17.
The Graetz number is concerned with the