Fluid Mechanics MCQs

Question 1

In the low Reynolds number region, the drag force on a sphere is proportional to

Accepted Answer

V

Answer

V2

Answer

V4

Answer

V0.5

Question 2

Pick out the wrong statement:

Accepted Answer

The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity

Answer

The vacuum pressure is always the negative gauge pressure

Answer

The pressure of the liquid measured by a piezometer tube is the gauge pressure

Answer

Manometric liquid should have high surface tension

Question 3

The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonion fluid in a circular pipe is

Accepted Answer

0.5

Answer

1

Answer

2

Answer

0.66

Question 4

Power required for mixing Newtonion fluids is a function of the

Accepted Answer

None of these

Answer

Speed of impeller, diameter of impeller & viscosity

Answer

Density & viscosity of fluid only

Answer

Density of fluid, viscosity of fluid & impeller dia only

Question 5

Nominal size of a pipe is an indication of its __________ diameter.

Accepted Answer

Approximate

Answer

Inner

Answer

Outer

Answer

None of these

Question 6

For pumping slurry, one can use a __________ pump.

Accepted Answer

Diaphargm

Answer

Reciprocating

Answer

Centrifugal

Answer

Pneumatic

Question 7

One dimensional flow implies

Accepted Answer

A flow which does not account for changes in transverse direction

Answer

Flow in a straight line

Answer

Steady uniform flow

Answer

Unsteady uniform flow

Question 8

One horsepower is equal to

Accepted Answer

550 lbf.ft/second

Answer

550 kgf.m/second

Answer

Both A and B

Answer

550 lbf.ft./hr

Question 9

A mono pump is a __________ pump.

Accepted Answer

Positive acting rotary

Answer

Centrifugal

Answer

Piston

Answer

A group of vacuum