Hydraulics MCQ Practice Questions

A pipe is defined as:

• An open channel for flow under gravity

• A closed conduit carrying fluid under pressure

• A venturi device used to measure discharge

• A porous medium used in seepage flow

Loss of head due to bends, valves, and other fittings in a pipe are categorized as:

• Major losses

• Minor losses

• Primary losses

• Secondary losses

The Darcy–Weisbach equation is used to calculate:

• Head loss due to friction

• Minor losses in a pipe

• Velocity distribution in a pipe

• Pressure drop due to contraction

In Darcy–Weisbach equation, the friction factor “f”:

• Depends only on pipe length

• Is always constant for all pipes

• Depends on Reynolds number and pipe roughness

• Is independent of flow conditions

Chezy’s equation relates:

• Pressure head and velocity head

• Pipe diameter and velocity

• Head loss and discharge

• Velocity, hydraulic radius, and bed slope

The expression of head loss due to sudden enlargement is:

• V^2 / 2g

• V1^2 − V2^2 / 2g

• 4flV^2 / 2gd

• k*V^2 / 2g

The expression of head loss due to sudden contraction is:

• V^2 / 2g

• V1^2 − V2^2 / 2g

• 4flV^2 / 2gd

• k*V^2 / 2g

The major loss of head in a long pipe is due to:

• Sudden enlargement

• Friction between fluid and pipe wall

• Sudden contraction

• Valves and bends

In pipes connected in series, which of the following is true?

• Head loss is the same in each pipe

• Discharge is the same through all pipes

• Velocity is the same in each pipe

• None of the above

In pipes connected in parallel:

• Discharge remains same in all branches

• Pipe diameters must be equal

• Velocity is constant in all branches

• Head loss is same in all parallel branches