Pick out the wrong statement.
Select an option to see the answer and solution.
Chemical Engineering · all questionsHeat Transfer
Heat Transfer
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
517
Questions
3/26
Page
Pick an option on a question to see the right answer and solution.
Economy of a multiple effect evaporator is not influenced much by the
Select an option to see the answer and solution.
Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re0.8 . Prn, is not valid, if the value of
Select an option to see the answer and solution.
LMTD for evaporators & condensers for a given terminal parameters & set of conditions for counterflow is equal to that for parallel flow. In such heat exchangers, with one of the fluids condensing or evaporating, the surface area required is the least in the __________ flow.
Select an option to see the answer and solution.
In evaporators, lowering the feed temperature
Select an option to see the answer and solution.
Latent heat absorbed by 1 lb of water at 212°F, when it is changed to steam at 212°F, may be around __________ BTU.
Select an option to see the answer and solution.
Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around __________ BTU.
Select an option to see the answer and solution.
When the ratio of the Grashoff number and to the square of Reynolds number is one, the dominant mechanism of heat transfer is
Select an option to see the answer and solution.
With increase in temperature, the thermal conductivity of non-metallic amorphous solids
Select an option to see the answer and solution.
What is the thermal conductivity of a perfect heat insulator?
Select an option to see the answer and solution.
Heat transfer by radiation between two bodies at T1 & T2 and in an ambient temperature of Ta°C depends on
Select an option to see the answer and solution.
Which of the following is correct?
Select an option to see the answer and solution.
Double pipe heat exchangers are used
Select an option to see the answer and solution.
Loss of heat from untagged steam pipe to the ambient air is by
Select an option to see the answer and solution.
A hot liquid is kept in a big room. The logorithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an
Select an option to see the answer and solution.
Pick out the wrong statement.
Select an option to see the answer and solution.
The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is __________ compared to the same size pipes without fins.
Select an option to see the answer and solution.
Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is
Select an option to see the answer and solution.
Baffles in the shell side of a shell and tube heat exchanger
Select an option to see the answer and solution.
Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then
Select an option to see the answer and solution.