In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?

Related Mcqs:

Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because___________________?

A. Convection becomes important B. Conduction becomes important C. Radiation becomes important D. Sub-cooled boiling occurs...

Radiator of an automobile engine is a ______________ type of heat exchanger?

A. Co-current B. Cross-current C. Counter-current D. Direct contact...

Fqra cold viscous feed, backward feed gives _____________ than forward feed?

A. A higher capacity B. A lower capacity C. Lower economy D. None of these...

A composite flat wall of a furnace is made of two materials ‘A’ and ‘B’. The thermal conductivity of ‘A’ is twice of that of material ‘B’, while the thickness of layer of ‘A’ is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material ‘A’ is________________?

A. 125 B. 133 C. 150 D. 160...

A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m2.°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be__________________?

A. Greater than that for un-insulated steam pipe B. Less than that of the un-insulated steam pipe C. Equal to that of the un-insulated steam pipe D. Less than the steam pipe with 5 cms insulation...