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Un-Answered Questions { Mechanical Engineering }

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

1129


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

1207


In which reactor the coolant and moderator are the same ?

1117


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

1089


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

1382


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 ?

1075


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

1121


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

1181


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

1219


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

1248


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

1249


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

1118


What are thermal neutrons ?

1116


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

1112


What for pyranometer is used ?

1095