fluid mechanics objective questions with answers part2

Q1. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to
(A) head of water (h)
(B) h2
(C) V/T
(D) h2

Q2. In a free vortex motion, the radial component of velocity everywhere is
(A) maximum
(B) minimum
(C) zero
(D) non-zero and finite

Q3. In a forced vortex, the velocity of flow everywhere within the fluid is
(A) maximum
(B) minimum
(C) zero
(D) non-zero finite

Q4. The region between the separation streamline and the boundary surface of the solid body is known as
(A) wake
(B) drag
(C) lift
(D) boundary layer

Q5. For hypersonic flow, the Mach number is
(A) unity
(B) greater than unity
(C) greater than 2
(D) greater than 4

Q6. Normal depth in open channel flow is the depth of flow corresponding to
(A) steady flow
(B) unsteady flow
(C) laminar flow
(D) uniform flow

Q7. Pitot tube is used for measurement of
(A) pressure
(B) flow
(C) velocity
(D) dsscharge

Q8. Hydrometer is used to determine
(A) specific gravity of liquids
(B) specific gravity of solids
(C) specific gravity of gases
(D) relative humidity

Q9. The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream
(A) keeps on increasing
(B) keeps on decreasing
(C) remains constant
(D) may increase/decrease

Q10. According to Bernoulli’s equation for steady ideal fluid flow
(A) principle of conservation of mass holds
(B) velocity and pressure are inversely proportional
(C) total energy is constant throughout
(D) the energy is constant along a stream-line but may vary across streamlines

Q11. The equation of continuity holds good when the flow
(A) is steady
(B) is one dimensional
(C) velocity is uniform at all the cross sections
(D) All of these

Q12. Mach number is significant in
(A) supersonics, as with projectiles and jet propulsion
(B) full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles et
(C) simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls
(D) all of these

Q13. Froude number is significant in
(A) supersonics, as with projectile and jet propulsion
(B) full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles et
(C) simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls
(D) All of these

Q14. All the terms of energy in Bernoulli’s equation have dimension of
(A) energy
(B) work
(C) mass
(D) length

Q15. The fluid forces considered in the Navier Stokes equation are
(A) gravity, pressure and viscous
(B) gravity, pressure and turbulent
(C) pressure, viscous and turbulent
(D) gravity, viscous and turbulent

Q16. A large Roynold number is indication of
(A) smooth and streamline flow
(B) steady flow
(C) turbulent flow
(D) highly turbulent flow

Q17. In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than
(A) frictional force
(B) viscosity
(C) surface friction
(D) All of these

Q18. Two pipe systems can be said to be equivalent, when the following quantites are same
(A) friction loss and flow
(B) length and diameter
(C) flow and length
(D) friction factor and diameter

Q19. For pipes, turbulent flow occurs when Reynolds number is
(A) less than 2000
(B) between 2000 and 4000
(C) more than 4000
(D) less than 4000

Q20. Bernoulli equation deals with the law of conservation of
(A) mass
(B) momentum
(C) energy
(D) work