In an extended surface heat exchanger, fluid having lower co-efficient________?

What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively?

Which of the following mechanical conveyors does not come under the division „scrapers‟?

The humid volume may be increased by increasing the________?

The value of critical Reynolds number for pipe flow is________?

The rate constant of a chemical reaction decreases by decreasing the________?