The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc?

Related Mcqs:

Commercial available medium size machines have a speed range of __________ ?

A. 200 to 400 r.p.m B. 600 to 1000 r.p.m C. 1000 to 1500 r.p.m D. 2000 to 2500 r.p.m...

By which of the following methods motor rating for variable load drives can be determined ?

A. Method of average losses B. Equivalent current method C. Equivalent torque method D. Equivalent power method E. All of the above...

Power transformers have rating_______________?

A. equal to 50 kVA B. equal to 100 kVA C. above 200 kVA D. none of the above...

The surge phenomenon is particularly important in case of_______________?

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

The cold rolled grain oriented steel has ___________ permeability in the direction of the grain orientation?

A. minimum B. maximum C. nil D. none of the above...