FLUID MECHANICS QUIZ

Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.

Friction

Manometric

Static

Total

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following pipe bends will incur the largest head loss ?

90° bend

30° bend

45° bend

U-bend

TRUE ANSWER : ?
YOUR ANSWER : ?

The continuity equation

Relates work and energy

Stipulates that Newton's second law of motion must be satisfied at every point in the fluid

Relates mass flow rate along a stream tube

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

In power law, ζ = A (du/dy)² + B , then the fluid is

Dilatant

Thixotropic

Rheopectic

Newtonian

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the value of Fanning friction factor f ' for smooth pipe at NRe = 10⁶ approximately?

0.3

0.003

0.01

0.1

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm².

Vane

Centrifugal

Plunger

Piston

TRUE ANSWER : ?
YOUR ANSWER : ?

Power number is the ratio of

Gravitational stress to drag stress

Inertial stress to drag stress

Inertial stress to gravitational stress

Drag stress to inertial stress

TRUE ANSWER : ?
YOUR ANSWER : ?

Water is flowing at 1 m/sec through a pipe (of 10 cm I.D) with a right angle bend. The force in Newtons exerted on the bend by water is

5π/√2

5π/2

5√2π

10√2π

TRUE ANSWER : ?
YOUR ANSWER : ?

Boundary layer thickness in laminar flow over a flat plate increases as(where, d = distance from the leading edge.)

d1/3

d2/3

d2

√d

TRUE ANSWER : ?
YOUR ANSWER : ?

If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is

Greater in 0.5 mm dia tube

Greater in 1 mm dia tube

Zero in both the tubes

Same in both the tubes

TRUE ANSWER : ?
YOUR ANSWER : ?

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