1. A fluid is a substance that(a) Always expands until it fills any container(b) Has the same shear stress at a pointregardless of its motion(c) Cannot remain at rest under action of anyshear force(d) Cannot be subjected to shear forcesANSWER: (b)2. Length of mercury column at a place at analtitude will vary with respect to that at groundin a(a) Linear relation(b) hyperbolic relation(c) Parabolic relation.(d) Manner first slowly and then steeplyANSWER: (d)3. When power is transmitted through a considerable distance by means of water underpressure, the maximum power is transmitted when frictional loss of head is(a) One third of the total head supplied(b) Half of the total head supplied(c) 10% of the total head(d) 17.7% 0f the total head.ANSWER: (a)4. A rotameter is a device used to measure(a) Velocity of fluid in pipes(b) Velocity of gauges(c) Votex flow(d) Flow of fluidsANSWER: (d)5. The continuity equation(a) Expresses relationship between hydraulicparameters of flow(b) Expresses the relationship, between work andenergy(c) Is based on Bernoulli’s theorem(d) Relates the mass rate of flow along a streamline.ANSWER: (d)6. Of the following, dimensionless parameter is(a) Pressure coefficient(b) Froude number(c) Darcy Weisbach friction factor(d) All of the aboveANSWER: (d)7. One dimensional flow(a) Restricted to flow in a straight line(b) Neglects changes in a transverse direction(c) Steady uniform flow

(d) A uniform flowANSWER: (b)8. Steady flow occurs when(a) Pressure does not change along the flow(b) Velocity does not change(c) Conditions change gradually with time(d) Conditions do not change with time at any point.ANSWER: (d)9. Equation Continuity of fluids is applicable only when the flow is(a) Steady(b) One dimensional(c) Compressive(d) All of the aboveANSWER: (d)10. If the particles of a fluid attain such velocities that vary from point to point in magnitude anddirection as well as from instant, the flow is(a) Uniform flow(b) Steady flow(c) Turbulent flow(d) Laminer flowANSWER: (c)11. In a turbulent flow in a pipe(a) Reynolds number is greater than 10000(b) Fluid particles move in straight lines(c) Head loss varies linearly with flow rate(d) Shear stress varies linearly with radiusANSWER: (d)12. In laminar flow, maximum velocity at the centreOf pipe is how many times to the average velocity(a) Two(b) Three(c) Four(d) None of the aboveANSWER: (a)13. A sharp edged obstruction over which the flowof a fluid takes place is(a) Wear(b) Notch(c) Orifice(d) None of theseANSWER: (c)14. The non-dimensional factor governing frictional resistance is(a) Reynolds number(b) Weber number(c) Froude number(d) Mach numberANSWER: (d)

15. Non uniform flow occurs when(a) Direction and magnitude of velocity at allpoints are identical(b) Velocity of successive fluid particles, at anypoint, is same at successive periods of time(c) Magnitude and direction of velocity do notchange from point to point in the fluid(d) Velocity, depth, pressure, etc. changes pointto point in the fluid flowANSWER: (d)16. For measuring flow by a venturimeter, it shouldbe installed in(a) Vertical line(b) Horizontal line(c) Inclined line with upward flow(d) In any direction and in any locationANSWER: (d)17. The fluid forces considered in the Navier Stokesequation are(a) Gravity, pressure and viscous(b) Gravity, pressure and turbulent(c) Pressure, viscous and turbulent(d) Gravity, viscous and turbulentANSWER: (a)18. Reynolds 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 etc.(c) Simultaneous motion through two fluids where there is a surface of discontinuity,gravity forces, and wave making effect, as with ship’s hulls(d) All of the aboveANSWER: (b)Q.51. A streamline is defined as the line(a) Parallel to central axis flow(b) Parallel to outer surface to pipe g(c) Of equal velocity in a flow(d) Along which the pressure drop is uniformANSWER: (c)19. The cepoletti weir functions as if it were afollowing notch without end contractions(a) Triangular notch(b) Trapezoidal notch(c) Rectangular notch(d) Parallelogram notchANSWER: (c)20.Match number is significant in(a) Supersonics, as with projectiles and jetpropulsion(b) Full immersion or completely enclosed flow,

as with pipes, aircrafts wings, nozzles etc.(c) Simultaneous motion through two fluidswhere there is a surface of discontinuitygravity force, and wave making effects, aswith ship’s hull(d) All of the aboveANSWER: (a

1. In Red wood viscometer(a) Absolute value of viscosity is detemiined(b) Part of the head of fluid is utilized inOvercoming friction(c) Fluid discharges through orifice withnegligible velocity(d) Comparison of viscosity is done.ANSWER: (d)

2. Centre of buoyancy is(a) The point of intersection of buoyant force andcentre line of the body(b) Centre of gravity of the body(c) Centric of displaced volume fluid(d) Midpoint between C.G. and metacentric.ANSWER: (c)

3. In isentropic flow; the temperature(a) Cannot exceed the reservoir temperature(b) Cannot drop and again increase downstream(c) Is independent of Match number(d) Is a function of Match number onlyANSWER: (a)

4. A stream line is(a) The line of equal velocity in a flow(b) The line along which the rate of pressure dropis uniform(c) The line along the geometrical centre of theflow(d) Fixed in space in steady flow.ANSWER: (d)

5. The flow of water in a pure of diameter 3000mm can be measured by(a) Venturimeter(b) Rotameter(c) Pilot tube(d) Orifice plate.ANSWER: (c)

6. Apparent shear forces(a) Can never occur in frictionless fluidregardless of its motion(b) Can never occur when the fluid is at rest(c) Depend upon cohesive forces

(d) All of the aboveANSWER: (d)

7. Weber number is the ratio of(a) Inertial forces to surface tension(b) Inertial forces to viscous forces(c) Elastic forces to pressure forces(d) Viscous forces to gravityANSWER: (a)

8. A small plastic boat loaded with pieces of steelrods is floating in a bath tub. If the cargo is dumpedinto the water allowing the both to float empty, thewater level in the tub will(a) Rise(b) Fall(c) Remains same(d) Rise and then fallANSWER: (b)

9. A flow in which each liquid particle has adefinite path and their paths do not cross eachother, is called(a) Steady flow(b) Uniform flow.(c) Streamline flow(d) Turbulent flowANSWER: (c)

10. Buoyant force is(a) Resultant of up thrust and gravity forces actingon the body(b) Resultant force on the body due to the fluidsurrounding it(c) Resultant of static weight of body anddynamic thrust of fluid’(d) Equal to the volume of liquid displaced bythe bodyANSWER: (d)

11. Cavitations is caused by(a) High velocity(b) Low barometric pressure(c) High pressure(d) Low pressureANSWER: (d)

12. The general energy equation is applicable to(a) Steady flow(b) Unsteady flow(c) Non-uniform flow(d) Turbulent flowANSWER: (a)

13. The friction resistance in Pipe is proportionalTo Square of V , according to(a) Froudeaiumber(b) Reynolds-Weber(c) Darcy-Reynolds(d) Weber-FroudeANSWER: (a)

14. Pitot tube is used to measure the velocity head of(a) Still fluid(b) Laminar flow(c) Turbulent flow(d) Flowing fluidANSWER: (d)

15. In equilibrium condition, fluids are not able to sustain(a) Shear force(b) Resistance to viscosity(c) Surface tension(d) Geometric similitudeANSWER: (c)

16. Flow occurring in a pipeline when a valve isbeing opened is(a) Steady(b) Unsteady(c) Laminar(d) VortexANSWER: (b)

17. Total pressure on 1 m x 1 m gate immersed vertically at a depth of 2 m below the free watersurface will be(a) 1000 kg(b) 2000 kg(c) 4000 kg(d) 8000 kgANSWER: (a)

18. A large Reynold number is indication of(a) Smooth and streamline flow(b) Laminar flow(c) Steady flow(d) Highly turbulent flowANSWER: (d)

19. In steady flow of a fluid, the acceleration of anyfluid particle is(a) Constant(b) Variable(c) Zero(d) Never zeroANSWER: (c)

20. Froude number is significant in(a) Supersonics, as with projectile and jet propulsion(b) Full immersion or completely enclosed flow, as with pipes, aircrafts wings, nozzles etc.,(c) Simultaneous motion through two fluids where there is a surface of discontinuity,gravity forces(d) All of the aboveANSWER: (c)

21. The flow in venturiflume takes place at(a) Atmospheric pressure(b) Vacuum(c) High pressure(d) Any pressureANSWER: (a)

22. Two dimensional flow occurs when the(a) Directional and magnitude of the velocity at all points are identical(b) Velocity of successive fluid particles, at any point, is same at successive periods of time(c) Magnitude and direction of velocity, do not change from point to point in the fluid(d) Fluid particles move in a plane or parallel planes and the streamline patterns areidentical in each planeANSWER: (d)

23. A piece of wood having weight 5 kg floats inwater with 60% of its volume under the (liquid.The specific gravity of wood is(a) 0.83(b) 0.6(c) 0.4(d) None of the aboveANSWER: (b)

24. In order that the water shall never rise more than100 cm above the crest for a discharge of 5 cubicmetres per second, the length of weir will be(a) 1 metre(b) 2.5 metres(c) 2.49 metres(d) 2.51 metresANSWER: (c)

25. Separation of flow occurs due to reduction ofpressure gradient to(a) Zero(b) Negligibly low value(c) The extent such that vapour formation starts(d) None of the aboveANS1. The square root of the ratio of inertia force to gravity force is called

a. Reynolds number      b. Froude number          c. Mach number                        d. Euler number 2. The thickness of turbulent boundary layer at a distance x from the leading edge over a flat plate varies asa. x4/5                b. x1/2                c. x1/5                d. x3/5

 3. The Bernoulli’s equation refers to conservation ofa. mass                                                b. linear momentum                  c. angular momentum                            d. energy 4. In a normal shock wave in one dimensional flowa. pressure, density and temperature increase                       b. velocity, temperature and density increasec. pressure, density and temperature decrease                      d. velocity, pressure and density decrease 5. The drag coefficient for laminar flow varies with Reynolds number (Re) asa. Re1/2              b. Re                            c. Re-1                           d. Re-1/2

 6. The continuity equation in a differential form isa. dA/A + dV/V + dρ/ρ = constant                                  b. A/dA + V/dV + ρ/dρ = constantc. dA/A + dV/V + dρ/ρ = 0                                             d. AdA + VdV + ρdρ = 0 7. What is the percentage error in the estimation of the discharge due to an error of 2% in the measurement of the reading of a differential manometer connected to an orifice meter?a. 4                   b. 3                  c. 2                   d. 1 8. Which one of the following is the characteristic of a fully developed laminar flow?a. The pressure drop in the flow direction is zerob. The velocity profile changes uniformly in the flow directionc. The velocity profile does not change in the flow directiond. The Reynolds number for the flow is critical 9. A circular plate of 1.5 m diameter is submerged in water with its greatest and least depths below the water surface being 2 m and 0.75 m respectively, what is the approximate magnitude of the total thrust on one face of the plate?a. 24Kn             b. 28kN             c. 12kN             d. 16kN 10. Which of the following statements is correct?A steady flow of diverging straight stream linesa. is a uniform flow with local acceleration                            b. has convective normal accelerationc. has convective tangential acceleration                              d. has both convective normal and tangential accelerations 11. Bernoulli’s theorem P/ρg + V2/2g = constant is valida. along different streamlines in rotational flow                               b. along different streamlines in irrotational flowc. only in the case of flow of gas                                                  d. only in the case of flow of liquid 12. Two pipelines of equal lengths are connected in series. The diameter of the second pipe is two times that of the first pipe. The ratio of frictional head losses between the first pipe and the second pipe isa. 1:32              b. 1:16              c. 1:8                d. 1:4 13. The following instruments are used in the measurement of discharge through a pipe:1. Orifice meter                        2. Flow nozzle              3. Venturimetera. 1, 3, 2           b. 1, 2, 3           c. 3, 2, 1           d 2, 3, 1 14. If a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena contracta, then its coefficient of contraction will bea. 0.32              b. 0.64              c. 0.96              d. 1.64 15. Boundary layer separation is caused by

a. reduction of pressure below vapour pressure                        b. reduction of pressure gradient to zeroc. an adverse pressure gradient                                             d. reduction of boundary layer to zero thickness 16. The velocity distribution in laminar flow through a circular pipe follows thea. linear law                   b. parabolic                  c. cubic power law         d. logarithmic law 17. Fluids that require a gradually increasing shear stress to maintain a constant strain rate are known asa. rhedopectic fluids                  b. thixotropic fluids       c. pseudoplastic fluids              d. Newtonian fluids 18. The fraction of the volume of a solid piece of metal of relative density 8.25 floating above the surface of a container of mercury of relative density 13.6 isa. 1.648            b. 0.607            c. 0.393                        d. 0.352 19. An instrument which offers no obstruction to the flow, offers no additional loss and is suitable for flow measurement isa. Venturimeter                          b. Rotameter                 c. Magnetic flow meter              d. Bend meter   20. The minimum value of friction factor ‘f’ that can occur in laminar flow through a circular pipe is:a. 0.064            b. 0.032            c. 0.016                        d. 0.008

 

WER: (c)

1. In Red wood viscometer(a) Absolute value of viscosity is detemiined(b) Part of the head of fluid is utilized inOvercoming friction(c) Fluid discharges through orifice withnegligible velocity(d) Comparison of viscosity is done.ANSWER: (d)

2. Centre of buoyancy is(a) The point of intersection of buoyant force andcentre line of the body(b) Centre of gravity of the body(c) Centric of displaced volume fluid(d) Midpoint between C.G. and metacentric.ANSWER: (c)

3. In isentropic flow; the temperature(a) Cannot exceed the reservoir temperature(b) Cannot drop and again increase downstream(c) Is independent of Match number(d) Is a function of Match number onlyANSWER: (a)

4. A stream line is(a) The line of equal velocity in a flow(b) The line along which the rate of pressure dropis uniform(c) The line along the geometrical centre of the

flow(d) Fixed in space in steady flow.ANSWER: (d)

5. The flow of water in a pure of diameter 3000mm can be measured by(a) Venturimeter(b) Rotameter(c) Pilot tube(d) Orifice plate.ANSWER: (c)

6. Apparent shear forces(a) Can never occur in frictionless fluidregardless of its motion(b) Can never occur when the fluid is at rest(c) Depend upon cohesive forces(d) All of the aboveANSWER: (d)

7. Weber number is the ratio of(a) Inertial forces to surface tension(b) Inertial forces to viscous forces(c) Elastic forces to pressure forces(d) Viscous forces to gravityANSWER: (a)

8. A small plastic boat loaded with pieces of steelrods is floating in a bath tub. If the cargo is dumpedinto the water allowing the both to float empty, thewater level in the tub will(a) Rise(b) Fall(c) Remains same(d) Rise and then fallANSWER: (b)

9. A flow in which each liquid particle has adefinite path and their paths do not cross eachother, is called(a) Steady flow(b) Uniform flow.(c) Streamline flow(d) Turbulent flowANSWER: (c)

10. Buoyant force is(a) Resultant of up thrust and gravity forces actingon the body(b) Resultant force on the body due to the fluidsurrounding it(c) Resultant of static weight of body anddynamic thrust of fluid’(d) Equal to the volume of liquid displaced by

the bodyANSWER: (d)

11. Cavitations is caused by(a) High velocity(b) Low barometric pressure(c) High pressure(d) Low pressureANSWER: (d)

12. The general energy equation is applicable to(a) Steady flow(b) Unsteady flow(c) Non-uniform flow(d) Turbulent flowANSWER: (a)

13. The friction resistance in Pipe is proportionalTo Square of V , according to(a) Froudeaiumber(b) Reynolds-Weber(c) Darcy-Reynolds(d) Weber-FroudeANSWER: (a)

14. Pitot tube is used to measure the velocity head of(a) Still fluid(b) Laminar flow(c) Turbulent flow(d) Flowing fluidANSWER: (d)

15. In equilibrium condition, fluids are not able to sustain(a) Shear force(b) Resistance to viscosity(c) Surface tension(d) Geometric similitudeANSWER: (c)

16. Flow occurring in a pipeline when a valve isbeing opened is(a) Steady(b) Unsteady(c) Laminar(d) VortexANSWER: (b)

17. Total pressure on 1 m x 1 m gate immersed vertically at a depth of 2 m below the free watersurface will be(a) 1000 kg(b) 2000 kg(c) 4000 kg(d) 8000 kgANSWER: (a)

18. A large Reynold number is indication of(a) Smooth and streamline flow(b) Laminar flow(c) Steady flow(d) Highly turbulent flowANSWER: (d)

19. In steady flow of a fluid, the acceleration of anyfluid particle is(a) Constant(b) Variable(c) Zero(d) Never zeroANSWER: (c)

20. Froude number is significant in(a) Supersonics, as with projectile and jet propulsion(b) Full immersion or completely enclosed flow, as with pipes, aircrafts wings, nozzles etc.,(c) Simultaneous motion through two fluids where there is a surface of discontinuity,gravity forces(d) All of the aboveANSWER: (c)

21. The flow in venturiflume takes place at(a) Atmospheric pressure(b) Vacuum(c) High pressure(d) Any pressureANSWER: (a)

22. Two dimensional flow occurs when the(a) Directional and magnitude of the velocity at all points are identical(b) Velocity of successive fluid particles, at any point, is same at successive periods of time(c) Magnitude and direction of velocity, do not change from point to point in the fluid(d) Fluid particles move in a plane or parallel planes and the streamline patterns areidentical in each planeANSWER: (d)

23. A piece of wood having weight 5 kg floats inwater with 60% of its volume under the (liquid.The specific gravity of wood is(a) 0.83(b) 0.6(c) 0.4(d) None of the aboveANSWER: (b)

24. In order that the water shall never rise more than100 cm above the crest for a discharge of 5 cubicmetres per second, the length of weir will be(a) 1 metre(b) 2.5 metres(c) 2.49 metres(d) 2.51 metresANSWER: (c)

25. Separation of flow occurs due to reduction ofpressure gradient to(a) Zero(b) Negligibly low value(c) The extent such that vapour formation starts(d) None of the aboveANSWER: (c)