GATE PI 2011 | Laminar Flow Question 1 | Fluid Mechanics

GATE PI 2011

MCQ (Single Correct Answer)

-0.6

Water is flowing through a horizontal pipe of constant diameter and the flow is laminar. If the diameter of the pipe is increased by $$50\% $$ keeping the volume flow rate constant, then the pressure drop in the pipe due to friction will decrease by

$$33\% $$

$$50\% $$

$$70\% $$

$$80\% $$

GATE PI 2009

MCQ (Single Correct Answer)

-0.6

The pressure drop for laminar flow of a liquid in a smooth pipe at normal temperature and pressure is

directly proportional to density

inversely proportional to density

independent of density

proportional to (density)$$\,{}^{0.75}$$

GATE PI 2008

MCQ (Single Correct Answer)

-0.6

Two pipes of uniform section but different diameters carry water at the same volumetric flow rate. Water properties are the same in the two pipes. The Reynolds number, based on the pipe diameter,

is the same in the both pipes

is large in the narrow pipe

is smaller in the narrower pipe depends on the pipe material

depends on the pipe material

GATE PI Subjects

Engineering Mechanics

Engineering Mechanics Static and Dynamics

Strength of Materials

Pure Bending Shear Force and Bending Moment Complex Stresses Simple Stress and Strain Deflection of Beams Thin Cylinders

Theory of Machines

Analysis of Plane Mechanisms Flywheel

Engineering Mathematics