The maximum heat transfer co-efficient from steam heating will be attained when the steam is_________________?

Related Mcqs:

A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m3 and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m2.K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is_________________?

A. 555 B. 55.5 C. 0.55 D. 0.15...

Fouling factor_____________________?

A. Is a dimensionless quantity B. Does not provide a safety factor for design C. Accounts for additional resistances to heat flow D. None of these...

Which of the following is correct ?

A. Rate = Driving force × Resistance B. Driving force = Rate × Resistance C. Resistance = Driving force × Rate D. Rate = Resistance/Driving force...

Pick out the wrong statement ?

A. Superheated steam is preferably not used for process heating because of its low heat transfer film co-efficient B. In a shell and tube heat exchanger, the shell pressure drop is maximum for orifice baffles C. S.I. unit of fouling factor is Watt/m2.°K D. Longitudinal fins are used in extended surface heat exchangers, when the … Pick out the wrong statement ?Read More...

Boiling point elevation of a solution of NaOH _____________________?

A. Increases rapidly with temperature rise B. Is almost independent of temperature C. Is almost independent of pressure D. Both B. and C...