Mechanical Engineering Interview Questions
Qn. What is
fluid? What is fluid mechanics?
Answer : A fluid is a substance which always
responses to shear stress
and doesn’t have
any definite shape. It may or may not have any
definite volume.
Qn. How to
determine the characteristics of fluid flow?
Answer: By the values of Reynolds Number.
Qn. What are
laminar and turbulent flows?
Answer : When a fluid is flowing around an
object or flowing through an
object, the flow
may be smooth or may be distorted. The smoother flow occurs
due to low velocity and distorted flow occurs due to high velocity. This low
velocity smoother flow is called laminar flow and distorted flow is called
turbulent flow.
Qn. What is
buoyancy force ?
Answer : Buoyancy is the upward force which is felt on an object simply
immersed into a fluid.
Qn. Which
dimensionless number is used to determine the speed of aircraft ?
Answer : Mach Number.
Qn. What are
compressible and incompressible flows?
Answer : compressible flow – variable density fluid flow .
Incompressible flow – fixed density fluid flow .
Qn. What is
meant by compressibility property of fluid ?
Answer : Compressibility is the property of those fluids which doesn’t
have any fixed density.
Qn. What is
meant by flow property of fluid ?
Answer : Flow property means the responsiveness of the fluid to the
shear stress.
Qn. What is
meant by no-slip condition in fluids ?
Answer : No-slip condition occurs at the microscopic level where the
fluid is flowing on a solid surface and the velocity of the fluid is zero at
the contact surface .
Qn. What are the
different units of viscosity ?
Answer : In SI – Kg (m.s) . In CGS slug (ft.s) . The values of viscosity
is often very small so for that reason a more reasonable unit is used which is
called cP or centipoise.
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TOP 10+ MECHANICAL ENGINEER INTERVIEW QUESTION ANSWER PART-5(SHAFT,BELT,SPRING)
MECHANICAL ENGINEERING INTERVIEW PART-2
MECHANICAL ENGINEERING PART-1
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