The thermal conductivity of hydrogen is _____________ times that of air?

Related Mcqs:

The design of mechanical parts is particularly important in case of __________ speed machines?

A. low B. medium C. high D. any of the above...

__________is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?

A. Grey cast-iron B. Cast steel C. High carbon steel D. Stainless steel...

On which of the following variables heat convected depends ?

A. Power density B. Temperature difference between heated surface and coolant C. Thermal resistivity, density, specific heat D. Gravitational constant E. All of the above...

The stator of a D.C. machine comprises of_____________?

A. main poles B. interpoles C. frame D. all of the above...

The input impedance of a JFET is _____________that of an ordinary transistor?

A. equal to B. less than C. more than D. none of the above...