In a rotary drier, the average retention time of solid is (where Z = length of the drier, metres ρ = apparent solid density, kg/m3 L = flow rate of dry solids, kg/see. m2 drier crosssection H = hold up of solid.) ?

Related Mcqs:

At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally ?

A. Higher B. Lower C. Same D. Unpredictable...

The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area ‘A’ is given by (where, P = perimeter of the channel in contact with the fluid) ?

A. 4 A/P B. A/P C. 4 P/A D. √A...

Rotary driers are most economically designed for the number of heat transfer units (HTU) from _________________?

A. 0.01 to 1 B. 1.5 to 2.5 C. 5 to 10 D. 10 to 20...

The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about ______________ kms?

A. 1 B. 5 C. 15 D. 25...

The wall thickness for a large high pressure pipeline is determined by the consideration of the____________________?

A. Axial tensile stress in the pipe B. Forces exerted by static and dynamic action at bends C. Circumferential pipe-wall tension D. Temperature stresses...