## Hydraulics MCQ Practice Questions (Civil Engineering) Set 3

Options are :

• B
• A
• C
• D

Options are :

• C
• D
• B
• E
• A

Options are :

• 33.3%
• 50%
• 25%
• 66.67%

Options are :

• A
• B
• D
• C

##### A piezometer opening in pipes measures:

Options are :

• Negative static pressure
• Total pressure
• Static pressure

##### If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its:

Options are :

• None of these
• Specific gravity
• Specific mass
• Specific weight

##### Pick up the correct statement regarding Borda's mouth piece running full from the following:

Options are :

• Coefficient of contraction is 1
• Theoretical velocity at the outlet is ?2gH
• Actual velocity at the out let is ?gH
• Coefficient of velocity is 1/?2
• All the above

##### If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm2, the pressure at a depth of 2.5 m, is:

Options are :

• 2 metres of water
• 1 metre of water
• 3.5 metres of water
• 3 metres of water
• 4.0 metres of water

##### A pipe of 0.1 m^(2) cross sectional area suddenly enlarges to 0.3 m^(2) cross-sectional area. If the discharge of the pipe is 0.3 m^(3) /sec, the head loss is:

Options are :

• 1g m of water
• g/2 m of water
• ?g m of water
• 2/g m of water

##### Hydrostatic pressure on a dam depends upon its:

Options are :

• Shape
• None of these
• Length
• Depth
• Material

##### The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid, if:

Options are :

• All the above
• Area is horizontal
• Area is vertical
• Area is inclined

Options are :

• A
• D
• C
• B

##### The shear stress distribution in viscous fluid through a circular pipe is:

Options are :

• None of these
• Maximum at the inside of surface
• Maximum at the centre
• Same throughout the section

##### Reynold number is the ratio of initial force and:

Options are :

• Viscosity
• Surface tension
• Elasticity
• Gravitational force

##### Bernoulli's equation assumes that:

Options are :

• Flow is along the stream line
• Fluid is homogeneous
• All the above
• Fluid is non-viscous

Options are :

• D
• B
• A
• C

##### An ideal flow of a liquid obeys:

Options are :

• Dynamic viscosity law
• Newton's law of viscosity
• Newton's second law of motion
• Continuity equation

Options are :

• B
• D
• A
• C

##### A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is:

Options are :

• More than 12.2 m of the water
• Equal of 12.2 m of water
• None of these
• Less than 12.2 m of the water

Answer :More than 12.2 m of the water

Options are :

• C
• D
• A
• B

##### The horizontal component of the force on a curved surface is equal to:

Options are :

• Weight of liquid vertically below the curved surface
• Weight of liquid retained by the curved area
• Product of pressure at its centroid and the area
• Force on a vetical projection of the curved surface

Answer :Force on a vetical projection of the curved surface

##### Unit of kinematic viscosity is:

Options are :

• Newton sec/m^(3)
• Kg sec/m^(2)
• Newton sec/m^(2)
• m^(2)/sec

##### The Empirical formula Larger image for discharge over large rectangular weirs, is known as:

Options are :

• Rehbook formula
• Bazin formula
• Francis formula
• Kutter's formula

##### The maximum vacuum created at the summit of a syphon is:

Options are :

• 5.5 m of water
• 2.7 m of water
• 7.4 m of water
• None of these

Options are :

• A
• D
• B
• C

##### The phenomenon occuring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface, is:

Options are :

• Critical discharge
• Water hammer
• Hydraulic jump
• None of these

Options are :

• 18,000 kgf
• 10,000 kgf
• 15,000 kgf
• 20,000 kgf

Options are :

• B
• C
• D
• A

Options are :

• 1.25
• 1.50
• 2.00
• 1.33
• 1.66

Options are :

• 1 to 2
• 1 : 5
• 1 to 4
• 1 to 3