   ## Hydraulics MCQ Practice Questions (Civil Engineering) Set 1

##### Poise is the unit of:

Options are :

• Kinematic viscous
• Mass density
• Viscosity

##### Pick up the correct statement from the following:

Options are :

• Dimensional homogeneity means the dimensions of each term in an equation on both sides are equal
• Dimensionally homogeneous equations are independent of the system of units
• All the above
• In dimensionally homogeneous equation, the powers of fundamental dimensions on either side of the equation are identical

##### For a most economical rectangular channel, the hydraulic mean depth, is equal to:

Options are :

• One-third depth of flow
• None of these
• Half the depth of flow
• The depth of flow

Answer :Half the depth of flow

Options are :

• 1.5%
• 1.75%
• 2.25%
• 1.25%

##### For a long pipe, the head loss:

Options are :

• At the entrance and outlet both are ignored
• At the outlet is ignored
• At the entrance is ignored
• Due to friction is ignored

Answer :At the entrance and outlet both are ignored

##### Water belongs to:

Options are :

• None of these
• Non-Newtonian fluids
• Newtonian fluids
• Compressible fluid

##### Hydraulic coefficient of an orifice means the coefficient of:

Options are :

• Contraction
• Velocity
• Resistance
• All the above

##### Capillary rise of water is:

Options are :

• Inversely proportional to diameter of the tube
• All of these
• Inversely proportional to water density
• Directly proportional to surface tension

Options are :

• ?H
• H^(7/2)
• 1/?H
• H^(3/2)
• H^(5/2)

Options are :

• 2.5 g
• 3 g
• g
• 2 g
• g/2

##### A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water:

Options are :

• Falls on the back side of the tank
• Rises on the front side of the tank
• None of these
• Rises on the back side and falls on the front side
• Remains the same at both sides of the tank

Answer :Rises on the back side and falls on the front side

##### If the Mach number for a fluid flow is less than 1, the flow is:

Options are :

• Supersonic
• None of these
• Sonic
• Sub-sonic

##### The dimensional formula of force is:

Options are :

• M^(-1)L^(2)T^(-2)
• M^(-1)LT^(2)
• ML^(-2)T
• MLT^(-2)
• None of these

Options are :

• B
• A
• C
• D

Options are :

• A
• C
• D
• B

##### Chezy's constant Larger image is suggested by:

Options are :

• Powell
• Bazin
• Kutter
• Manning

Options are :

• Remains above the centre line of conduit
• May be above or below the centre line of conduit
• Remains below the centre line of conduit
• Remains parallel to the centre line of conduit

Answer :May be above or below the centre line of conduit

##### For mountaneous regions having steep slope, wagons for carrying liquid are made with bottom:

Options are :

• Inclined downward while moving downwards
• Parallel to the horizontal surface
• Parallel to the road surface
• Inclined upward while moving upwards

Answer :Parallel to the horizontal surface

##### Hydraulic radius is equal to:

Options are :

• Wetted perimeter divided by area
• Square root of the area
• Area divided by the square of wetted perimeter
• Area divided by wetted perimeter

Answer :Area divided by wetted perimeter

Options are :

• B
• A
• D
• C

##### In a venturimeter, the divergent cone is kept:

Options are :

• Equal to covergent cone
• None of these
• Longer than convergent cone
• Shorter than convergent cone

##### Orifice meter is used to measure:

Options are :

• Discharge
• Pressure at the point
• Velocity
• Average speed

##### The flow is called rotational if its velocity normal to the plane of area is equal to:

Options are :

• None of these
• Thrice the angular velocity vector
• Twice the angular velocity vector
• Angular velocity vector

Answer :Twice the angular velocity vector

##### The ratio of the inertia and viscous forces acting in any flow, ignoring other forces, is called:

Options are :

• Reynold number
• Frode number
• Weber number
• Euler number

Options are :

• D
• C
• A
• B

##### Energy equation is usually applicable to:

Options are :

• Laminar flow
• Turbulent flow
• Non-uniform flow

##### Total pressure on the top of a closed cylindrical vessesl completely filled with liquid, is directly proportional to:

Options are :

• None of these

##### To avoid the tendency of separation of liquid flow, the most suitable ratio of the diameters of the throat and the pipe, is:

Options are :

• 1/2 to 3/4
• None of these
• 1/3 to 1/2
• 1/4 to 1/8

##### For an irrotational flow, the equation Larger image is given by:

Options are :

• Cauchy-Riemann
• Bernoulli
• Laplaces
• Reynold

##### In a fluid flow a particle may posses:

Options are :

• Pressure energy
• All the above
• Kinetic energy
• Initial energy
• Elevation energy