A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of_________________?

Related Mcqs:

Cylindrical shell thickness of rotary drier is generally _______________ mm?

A. 2-3 B. 18-22 C. 6-8 D. 12-15...

The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from__________________?

A. 2 to 3 B. 3 to 5 C. 4 to 8 D. 6 to 12...

In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms?

A. 2.5 B. 7.5 C. 15 D. 20...

Which of the following material is seldom used for pressure vessel construction ?

A. Rimmed still B. Mild steel C. Killed steel D. Semi-killed steel...

Fouling factor must be included in the calculation of overall design heat transfer coefficient, when the liquid__________________?

A. Containing suspended solids flows at low velocity B. Containing suspended solids flows at high velocity C. Is highly viscous D. Is of high specific gravity...