Test: Hydraulics & Fluid Mechanics - 2 - Civil Engineering (CE) MCQ

A flow in which the volume of a fluid and its density does not change during the flow is called __________ flow.

The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.

The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

The pressure measured with the help of a piezometer tube is in

The power transmitted through a pipe is (where w = Specific weight in N/m³, and Q = Discharge in m³/s)

In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.

The weight per unit volume of a liquid at a standard temperature and pressure is called

The centre of buoyancy is the centre of area of the immersed body.

The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.

In open channels, the specific energy is the

The Bernoulli's equation is based on the assumption that

A compound pipe of diameter d₁, d₂ and d₃ having lengths l₁, l₂ and l₃ is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by

The velocity corresponding to Reynold number of 2800, is called

When the pipes are in series, the total head loss is equal to the sum of the head loss in each pipe.

Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at right angles to the direction of flow of the liquid is known as lift.

The efficiency of power transmission through pipe is (where H = Total supply head, and h_f = Head lost due to friction in the pipe)

The discharge over a rectangular weir, considering the velocity of approach, is (where H₁ = Total height of water above the weir = H + H_a , H = Height of water, over the crest of the weir, and H_a = Height of water, due to velocity of approach)

A flow in which __________ force is dominating over the viscosity is called turbulent flow.

If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.

The atmospheric pressure at sea level is

When the pressure intensity at a point is less than the local atmospheric pressure, then the difference of these two pressures is called vacuum pressure.