Curioustab

Home » Chemical Engineering » Heat Transfer

With increase in porosity, the thermal conductivity of a solid substance

increases
decreases
remains unchanged
may increase or decrease; depends on the solid

Correct Answer: decreases

← Previous Question Next Question→

More Questions from Heat Transfer

Heat waves
Presence of a non-condensing gas in a condensing vapour
Which of the following is not used as a medium for high temperature heating?
Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.
Increasing the liquor level in the evaporator results in the
The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film )
In case of evaporators, liquid entrainment results primarily due to
A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides
Pick out the wrong statement.
The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is 0.4. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator (COP)R and the co-efficient of performance as a heat pump (COP)HP are

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion