The ratio of kinematic viscosity to thermal diffusivity is called the _______________ number?
A. Peclet
B. Prandtl
C. Stanton
D. Nusselt
Chemical Heat Transfer
Vibrations in the tubes of a shell and tube heat exchanger is induced due to the _________________?
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 pig and/or supports due to external reasons
D. All A., B. and C.
What is the steam economy in case of a single effect evaporator system ?
What is the steam economy in case of a single effect evaporator system ?
A. 1
B. > 1
C. < 1
D. 0.1
For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus- Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of________________?
For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus- Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of________________?
A. 1
B. 1.74
C. 6.1
D. 37
Baffles in the shell side of a shell and tube heat exchanger ?
Baffles in the shell side of a shell and tube heat exchanger ?
A. Increase the cross-section of the shell side liquid
B. Force the liquid to flow parallel to the bank
C. Increase the shell side heat transfer co-efficient
D. Decrease the shell side heat transfer co-efficient
____________ chart is known as transient heat conduction chart?
____________ chart is known as transient heat conduction chart?
A. Dirhing’s
B. Heisler’s
C. Mollier’s
D. Cox
Controlling heat transfer film co-efficient is the one, which offers ______________ resistance to heat transfer?
Controlling heat transfer film co-efficient is the one, which offers ______________ resistance to heat transfer?
A. No
B. The least
C. The largest
D. Lower
Which of the following is concerned with both heat and mass transfer ?
Which of the following is concerned with both heat and mass transfer ?
A. Lewis relationship
B. Nusselt number
C. Kutateladze number
D. Froude number
Duhring‟s rule is important in solving problems on__________________?
Duhring‟s rule is important in solving problems on__________________?
A. Distillation
B. Crystallisation
C. Evaporation
D. Humidification
Heat transfer by radiation between two bodies at T1 & T2 and in an ambient temperature of Ta°C depends on_____________?
Heat transfer by radiation between two bodies at T1 & T2 and in an ambient temperature of Ta°C depends on_____________?
A. T1 – T2
B. T1 – Ta
C. T2 – Ta
D. None of these