For flow of a liquid metal through a circular tube, the velocity and temperature profiles are u(r)=2Um[1-(r/ro)2] and T(r) - Ts

= C2 [1 – (r/r0)2],respectively, where C2 is constant. What is the value of the Nusselt

number NuD at this location?

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t