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Heat Transfer

Heat Transfer
Which has the lowest Prandtl number?

Water
Lube oil
Liquid metal
Aqueous solution

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Heat Transfer
The Graetz number is concerned with the

heat transfer in laminar flow
absorption with chemical reaction
mass transfer between a gas and a liquid
heat transfer in turbulent flow

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Heat Transfer
Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively)

E/C
C/E
1/CE
CE

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Heat Transfer
In case of evaporators, liquid entrainment results primarily due to

high heat transfer rate
high heat transfer rate
high vacuum in the evaporator
foaming of the solution

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Heat Transfer
Which of the following is correct ?

Rate = Resistance/Driving force
Rate = Driving force x Resistance
Resistance = Driving force x Rate
Driving force = Rate x Resistance

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Heat Transfer
Boiling point elevation of an ideal solution

Both B and C
Decreases rapidly with temperature rise
Increases rapidly with temperature rise
In independent of pressure

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MORE MCQ ON Heat Transfer

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