Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of ?

Related Mcqs:

Sub zero treatment of steel is done to____________________?

A. Suppress martensite transformation B. Enhance its working performance in sub zero atmosphere C. Reduce the retained austenite in hardened steel D. Induce temper brittleness after its hardening...

Materials having ________________ lattice structure are usually the most ductile ?

A. Body centred cubic (bcc) B. Hexagonal close packed (hcp) C. Face centred cubic (fcc) D. None of these...

To counteract the bad effects of strain hardening on a cold formed part, it must be ______________________?

A. Tempered B. Normalised C. Annealed D. Hardened...

Hydrogen in liquid steels is dissolved_________________?

A. As tiny gas bubbles B. In the atomic form C. In the ionic form D. In the molecular form...

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ?

A. Steel B. Glass C. Rubber D. Brass...