"MECHANICAL ENGINEERING JOB INTERVIEW QUESTIONS"

MECHANICAL ENGINEERING JOB INTERVIEW QUESTIONS:-

1.). What do you understand by forced convection ?

Ans: When convection heat transfer occurs between a solid body and a fluid and where circulation of fluid is caused and controlled by some mechanical.

2.)What is boundary layer thickness in turbulent boundary layer ?

Ans: In ease of turbulent boundary layer, boundary layer thickness is defined as the distance from solid surface at which the fluid velocity is 99% of the undisturbed free stream velocity.
Near the surface of solid, there is laminar flow which changes to buffer zone and finally turbulent region.

3.). Stirling cycle with regenerative arrangement and Carnot cycle operate within same temperature limits. What can be said about thermal efficiencies of these two ?

Ans: Thermal n of both will be same.

4.). What is the frequency of secondary imbalance in four-stroke engine ?

Ans: Two times the engine speed

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