3651. The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is____________________?
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A. 2.5 m

B. 3.0 m

C. 5.0 m

D. 2.4 m

E. 4.0 m

3652. If the surface of liquid is convex, men ___________________?
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A. cohesion pressure is negligible

B. cohesion pressure is increased

C. there is no cohesion pressure

D. cohesion pressure is decreased

E. none of the above

3653. Hot wire anemometer is used to measure_______________?
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A. pressure intensity of gas

B. discharge

C. pressure intensity of liquid

D. velocity of gas
3654. Kinematic viscosity is equal to_________________?
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A. dynamic viscosity/density

B. dynamicviscosity x density

C. density/dynamic viscosity

D. same as dynamic viscosity

E. 1/dynamicviscosity x density

3655. The atmospheric pressure with rise in altitude decreases__________________?
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A. first slowly and then steeply

B. linearly

C. unpredictable

D. first steeply and then gradually

E. none of the above

3656. Which of the following instruments is used to measure flow on the application of Bernoullis theorem_________________?
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A. all of the above

B. nozzle

C. Venturimeter

D. pitot tube

E. Orifice plate

3657. The rise or depression of liquid in a tube due to surface tensionwim increase in size of tube will________________?
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A. increase

B. decrease

C. unpredictable

D. may increase or decrease depending on the characteristics of liquid

E. remain unaffected

3658. A pressure of 25 m of head of water is equal to_________________?
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A. 245 kN/m2

B. 2.5kN/m2

C. 12.5 kN/m2

D. 25 kN/m2

E. 2500 kN/m2

3659. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?
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A. 25 m/sec

B. 250 m/sec

C. 2 m/sec

D. 50 m/sec

E. 10 m/sec

3660. In a static fluid ___________________?
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A. fluid pressure is zero

B. viscosity is nil

C. linear deformation is small

D. resistance to shear stress is small

E. only normal stresses can exist
3661. The flow in which each liquid particle has a definite path and their paths do not cross each other is called__________________?
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A. steady flow

B. uniform flow

C. turbulent flow

D. streamline flow

E. one dimensional flow

3662. In an immersed body, centre of pressure is __________________?
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A. could be above or below e.g. depending on density of body and liquid

B. at the centre of gravity

C. unpredictable

D. below be centre of gravity

E. above the centre of gravity

3663. The equation of continuity holds good when the flow____________________?
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A. is one dimensional

B. velocity is uniform at all the cross sections

C. none of the above

D. is steady

E. all of the above
3664. For pipes, turbulent flow occurs when Reynolds number is _____________________?
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A. more than 4000

B. less than 2000

C. between 2000 and 4000

D. less than 4000

E. none of the above

3665. Which of the following is the unit of kinematic viscosity _________________?
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A. pascal

B. poise

C. none of the above

D. stoke

E. faraday

3666. Two dimensional flow occurs when________________?
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A. the direction and magnitude of the velocity at all points are identical

B. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

C. the velocity of successive fluid particles, at any point, is the same at successive periods of time

D. velocity, depth, pressure, etc. change from point to point in the fluid flow

E. the magnitude and direction of the velocity do not change from point to point in the fluid

3667. The value of mass density in kgsecVm4 for water at 0C is_________________?
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A. 101.9

B. 1

C. 100

D. 91

E. 1000

3668. For pipes, laminar flow occurs when Roynolds number is__________________?
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A. between 2000 and 4000

B. less than 4000

C. less than 2000

D. none of the above

E. more than 4000

3669. Buoyant force is___________________?
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A. equal to the volume of liquid displaced

B. the resultant force on a body due to the fluid surrounding it

C. force necessary to keep a body in equilibrium

D. none of the above

E. resultant force acting on a floating body

3670. Flow occurring in a pipeline when a valve is being opened is________________?
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A. laminar

B. unsteady

C. rotational

D. steady

E. vortex

3671. Manometer is used to measure__________________?
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A. pressure in pipes, channels etc

B. difference of pressure between two points

C. very low pressure

D. atmospheric pressure

E. velocity

3672. Center of buoyancy is the___________________?
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A. does not exist

B. center of pressure of displaced volume

C. centroid of the displaced volume of fluid

D. none of the above

E. e.g. of floating body

3673. Specific weight of water in S.I. units is equal to ________________?
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A. 1000 N/m3

B. 9.81 N/m3

C. 10000 N/m3

D. 9.81 xlO6N/m3

E. 9.81 xlO3 N/m3
3674. Ratio of inertia force to elastic force is known as__________________?
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A. none of the above

B. Webers number

C. Mach number

D. Reynolds number

E. Froude number

3675. Dynamic viscosity of most of the liquids with rise in temperature__________________?
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A. increases

B. remains unaffected

C. decreases

D. unpredictable

E. none of the above

3676. Non uniform flow occurs when_________________?
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A. the velocity of successive fluid particles, at any point, is the same at successive periods of time

B. velocity, depth, pressure, etc. change from point to point in the fluid flow

C. the direction and magnitude of the velocity at all points are identical

D. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

E. the magnitude aricf direction of the velocity do not change from point to point in the fluid

3677. Newtons law of viscosity is a relationship between____________________?
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A. shear stress, velocity and viscosity

B. pressure, velocity and viscosity

C. shear stress and viscosity

D. shear stress, pressure and rate of angular distortion

E. shear stress anctthejiate of angular distortion
3678. The bulk modulus of elasticity with increase in pressure__________________?
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A. increases

B. increases first up to certain limit and then decreases

C. unpredictable

D. decreases

E. remains constant

3679. According to Bernoullis equation for steady ideal fluid flow____________________?
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A. total energy is constant throughout

B. velocity and pressure are inversely proportional

C. none of the above

D. the energy is constant along a stream-line but may vary across streamlines

E. principle of conservation of mass holds

3680. If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be________________?
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A. w/h

B. h

C. h/w

D. h/wh

E. wh
3681. The two important forces for a floating body are__________________?
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A. inertial, gravity

B. buoyancy, inertial

C. buoyancy, gravity

D. gravity, pressure

E. buoyancy, pressure

3682. The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called_______________?
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A. reaction

B. center of pressure

C. buoyancy

D. metacentre

E. upthrust

3683. Resultant pressure of the liquid in the case of an immersed body acts through____________________?
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A. centre of pressure

B. in between e.g. and centre of pressure

C. centre of gravity

D. centre of buoyancy

E. metacentre

3684. Differential monometer is used to measure___________________?
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A. difference of pressure between two points

B. very low pressure

C. atmospheric pressure

D. velocity in pipes

E. pressure in pipes, channels etc.

3685. All the terms of energy in Bernoullis equation have dimension of_______________?
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A. time

B. length

C. mass

D. energy

E. work

3686. The flow in which conditions do not change with time at any point, is known as_________________?
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A. turbulent flow

B. one dimensional flow

C. steady flow

D. streamline flow

E. uniform flow

3687. Uniform flow occurs when_____________________?
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A. the velocity of successive fluid paiticles, at any point, is the same at successive periods of time

B. the direction and magnitude of the velocity at all points are identical

C. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each pleasure

D. velocity, depth, pressure, etc. change from point to point in the fluid flow

E. the magnitude and direction of the velocity do not change from point to point in the fluid
3688. If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its__________________?
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A. none of the above

B. specific density

C. specific gravity

D. specific weight

E. specific mass

3689. The fluid forces considered in the Navier Stokes equation are__________________?
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A. none of the above

B. gravity, pressure and viscous

C. pressure, viscous and turbulent

D. gravity, pressure and turbulent

E. gravity, viscous and turbulent

3690. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as_________________?
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A. none of the above

B. center of buoyancy

C. center of gravity

D. meta center

E. center of pressure
3691. Kinematic viscosity is dependent upon__________________?
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A. level

B. density

C. flow

D. distance

E. pressure

3692. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to_________________?
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A. h2

B. h2

C. V/T

D. head of water (h)

E. h3/1

3693. Steady flow occurs when___________________?
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A. the direction and magnitude of the velocity at all points are identical

B. velocity, depth, pressure, etc. change from point to point in the fluid flow

C. the velocity of successive fluid particles, at any point, is the same at successive periods of time

D. the magnitude and direction of the velocity do not change from point to point in the fluid

E. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

3694. A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?
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A. 1:V5?

B. 01:02.5

C. 1:25

D. 1 : 5

E. 1 : 53/2

3695. Metacentric height is the distance between the metacentre and_______________?
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A. center of gravity

B. none of the above

C. center of pressure

D. center of buoyancy

E. water surface

3696. Surface tension__________________?
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A. acts in the plane of the interface normal to any line in the surface

B. decreases with fall in temperature

C. has no units

D. is a function of the curvature of the interface

E. is also known as capillarity

3697. A streamline is defined as the line________________?
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A. of equal yelocity in a flow

B. parallel to central axis flow

C. which occurs in all flows

D. along which the pressure drop is uniform

E. parallel to outer surface of pipe

3698. Rotameter is a device used to measure______________?
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A. velocity of fluid

B. rotation

C. absolute pressure

D. velocity of air

E. flow
3699. The angle of contact in case of a liquid depends upon___________________?
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A. the nature of the liquid and the solid

B. the material which exists above the free surface of the liquid

C. both of die above

D. any one of the above

E. none of die above

3700. Dimensions of surface tension are___________________?
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A. MlL r2

B. MlL2T2

C. MlLTx

D. MlLT2

E. MlLt