1. Write the correct answer of the following:

An ideal fluid is defined as a fluid which

is compressible

is incompressible

is incompressible and non-viscous

has negligible surface tension

Kinematic viscosity is defined as equal to

dynamic viscosity x density

dynamic viscosity/density

dynamic viscosity x pressure

pressure x density

Stoke is the unit of

surface tension

viscosity

kinematic.viscosity

None of the above

The gases are considered incompressible when the Mach number is

equal to 1·0

equal to 0·5

more than 0·3

less than 0.2

The necessary condition for the flow to be steady is that

the velocity does not change from place to place

the velocity is constant at a point with respect to time

the velocity changes at a point with respect to time

None of the above

Bernoulli's theorem deals with the law of conservation of

mass

momentum

energy

None of the above

The flow rate through a circular pipe is measured by

Pitot tube

Venturimeter

Orificemeter

Both and

Compare and contrast uniform and non-uniform flow.

The diameters of a pipe at sections 1 and 2 are 10 cm and 15 cm, respectively. Find the discharge through the pipe, if the velocity of water flowing through the pipe at section 1is 5 m/sec. Also determine the velocity at section 2.

What are the assumptions made in the derivation of Bernoulli's equation?

Define venturimeter.

A horizontal venturimeter with inlet and throat diameters 30 cm and 15 cm, respectively, is used to measure the flow of water. The reading of differential manometer connected to the inlet and the throat is 20 cm of mercury. Determine the rate of flow.

Briefly describe the classification of orifice.

The head of water over the centre of an orifice of diameter 20 mm is 1 m. The actual discharge through the orifice is 0·85 litres/sec. Find the coefficient of discharge.

Derive an expression for discharge through a fully submerged orifice.

Find the discharge through a fully submerged orifice of width 2 if the difference of water levels on both sides of the orifice is 50 cm. The height of water from top and bottom of the orifice are 2·5 m and 2.75 respectively. (Take coefficient of discharge, Cd

Find the loss of head when a pipe of diameter 20 cm is suddenly enlarged. to a diameter of 40 cm. The rate of flow of water through the pipe is 250 litres/sec.

A horizontal pipe of diameter 50 cm is suddenly contracted to a diameter of 25 cm. The pressure intensities in the large and small pipes are given as 13·734 N/cm^2 and 11·772 N/cm^2 respectively. Find the loss of
head due to compaction, if Cc =0·62.

Derive an expression for the flow through a circular channel.

The rate of flow of water through a circular channel of diameter 0·6 m is 150 liters/sec. Find the slope of the bed of the channel for maximum velocity. (Take Chezy's C

8. Write short notes on any four of the following:

Chezy's Constant C

Causes of Minor Energy Losses

Viscosity

Newtonian Fluid vs Non-Newtonian Fluid

Bulk Modulus

Coplanar Non-Current Forces