Heat Transfer MCQ Questions & Answers

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

12

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

A) 1 B) 7 C) 18 D) 26

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Heat Transfer MCQ Questions & Answers | Chemical Engineering