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Un-Answered Questions { Mechanical Engineering }

Why high latent heat of vaporisation is desirable in a refrigerant ?

1168


What is the effect of friction on flow of steam through a nozzle ?

1253


In which reactor the coolant and moderator are the same ?

1156


Which element causes difference in higher and lower heating values of fuel ?

1137


Hydrogen cannot be removed easily from molten steel. What harm hydrogen has on property of steel ?

1440


Low water in boiler drum is unsafe because it may result in overheating of water tubes in furnace. Why it is unsafe to have high water condition in boiler drum ?

1141


Give one example each of the following proportion of materials dimensional, physical, technological and mechanical.

1173


What is the difference between nuclear fission and fission chain reaction?

1231


Why is it that the maximum value which the residual stress can reach is the elastic limit of the material ?

1263


What is the difference between alpha iron, delta iron and gamma iron ?

1291


Which reactor uses primary coolant as fluoride salts of lithium, beryllium, thorium and uranium ?

1290


Which two elements have same percentage in proximate and ultimate analysis of coal?

1182


What are thermal neutrons ?

1155


Why rockets using liquid hydrogen have higher specific impulse compared to liquid hydrocarbon ?

1155


What for pyranometer is used ?

1148