Un-Answered Questions { Mechanical Engineering }

Why efficiency of gas turbines is lower compared to i.c. Engines ?

634


For conduction of heat, the instantaneous rate of heat flow is product of three factors. What are these ?

585


Ultimate analysis of coal is elementary analysis. What it is concerned with ?

719


Under what circumstances would there be an increase in pressure in a diverĀ¬gent nozzle ?

595


What are orthotropic materials ?

599


Under what condition a convergent divergent nozzle required ?

630


What is a converter reactor ?

644


What is the difference between isotropic material and homogeneous material ?

625


Explain the difference between the points of inflexion and contraflexure?

652


What are whiskers ?

674


As compression ratio increases, thermal n increases. How is thermal n affected by weak and rich mixture strength ?

615


Why supercritical boilers use less amount of steel compared to non-supercritical boilers ?

604


Which factors influence the type of fracture in failure of a material ?

614


Which heating value is indicated by a calorimeter and why ?

690


Which pollutant is major greenhouse gas and what is its effect ?

613