  ## Hydraulics MCQ Practice Questions (Civil Engineering) Set 2

##### The ratio of inertia force of a flowing fluid and the viscous force of the liquid is called:

Options are :

• Euler's number
• Froude's number
• Weber's number
• Reynold's number

##### Flow of water in pipes of diameter more than 3 metres, can be measured by:

Options are :

• Pitot tube
• Venturimeter
• Orifice plate
• Rotameter

##### Specific weight of sea water is more than that of pure water because of:

Options are :

• Dissolved salts
• Dissolved air
• All the above
• Suspended matter

##### The upper surface of the weir over which water flows, is known as:

Options are :

• Sill
• Vein
• None of these
• Nappe

Options are :

• Pressure
• Depth
• Velocity
• Discharge

Options are :

• C
• A
• D
• B

##### For solving network problems of pipes, necessary condition is:

Options are :

• All the above
• Continuity equation
• Energy equation
• Darcy-Weisbach equation

Options are :

• Parabolic
• Elliptical
• Circular
• Hyperbolic

Options are :

• 2.5 m/sec
• 3 m/sec
• 0.5 m/sec
• 2.0 m/sec
• 1.0 m/sec

##### The instrument used for measuring the velocity of flow, is known as:

Options are :

• None of these
• Venturimeter
• Orifice meter
• Pitot tube

Options are :

• A
• B
• C
• D

##### The discharge formula Q = Cd ?2gH x A is used for rectangular:

Options are :

• Small and large orifices only
• Small orifices only
• Large orifices only
• For all types of orifices

##### An independent mass of a fluid does not posses:

Options are :

• Kinetic energy
• None of these
• Pressure energy
• Elevation energy

##### Differential manometers are used to measure:

Options are :

• Atmospheric pressure
• Very low pressure
• Difference in pressure at two points
• Pressure in water channels, pipes, etc

Answer :Difference in pressure at two points

##### The property of steam function ? is:

Options are :

• The flow around any path in the fluid is zero for continuous flow
• The velocity vector may be found by differentiating the stream function
• All the above
• The rate of change of ? with distance in an arbitrary direction, is proportional to the component of velocity normal to that direction
• ? is constant everwhere on any stream line

Options are :

• A
• D
• B
• C

##### When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to:

Options are :

• Weight of the body
• Weight of the fluid displaced by the body
• Weight of the body and fluild displaced by the body
• None of these
• Difference of weights of the fluid displaced and that of the body

Answer :Weight of the fluid displaced by the body

##### When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress Larger image , where ? is known as:

Options are :

• All the above
• Dynamic viscosity
• Viscosity
• Coefficient of viscosity
• Absolute viscosity

##### Most economical section of a circular channel for maximum discharge:

Options are :

• Hydraulic mean depth = 0.286 diameter of circular section
• Depth of water = 0.95 diameter of circular section
• Wetted perimeter = 2.83 depth of water
• Wetted perimeter = 2.6 diameter of circular section
• All the above

Options are :

• D
• A
• E
• B
• C

##### While applying the Bernoulli's equation Larger image = total head, the work any section done on the flow system, if any:

Options are :

• Is added on the right side of the equation
• Is ignored
• None of these
• Is added on the left side of the equation

Options are :

• 2?
• ?/2
• 3?
• ?
• 4?

Options are :

• 3
• 1/3
• 2
• 1/2

##### A pitot tube is used to measure:

Options are :

• Difference in pressure
• Pressure
• None of these
• Velocity of flow

Options are :

• D
• B
• A
• C

##### A syphon is used:

Options are :

• To fill up a tank with water at higher level from a lower level
• None of these
• To supply water to a town from higher level to lower level
• To connect water reservoirs at different levels intervened by a hill

Answer :To connect water reservoirs at different levels intervened by a hill

Options are :

• 0.5
• 1.25
• 0.75
• 2.00

Options are :

• 400 H.P.
• 550 H.P.
• 450 H.P.
• 500 H.P.

Options are :

• C
• A
• B
• D

##### The thickness of a sharp crested weir is kept less than:

Options are :

• One-fourth of the height of water on the sill
• One-third of the height of water on the sill
• None of these
• Two-third of the height of water on the sill
• One-half of the height of water on the sill

Answer :One-half of the height of water on the sill

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