HYDRAULICS & FLUID MECHANICS QUIZ

A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

remain same

increase/decrease depending on depth of immersion

increase

decrease

TRUE ANSWER : ?
YOUR ANSWER : ?

An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

10.2/m sec

10m/sec²

9.81 m/sec²

9.75 m/sec²

TRUE ANSWER : ?
YOUR ANSWER : ?

In a Sutro weir, the discharge is proportional to (where H is head)

H5/2

H3/2

H1/2

H

TRUE ANSWER : ?
YOUR ANSWER : ?

The region between the separation streamline and the boundary surface of the solid body is known as

drag

wake

boundary layer

lift

TRUE ANSWER : ?
YOUR ANSWER : ?

For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

directly proportional to Reynolds number and independent of pipe wall roughness

inversely proportional to Reynolds number and indpendent of pipe wall roughness

inversely proportional to Reynolds number and directly proportional to pipe wall roughness

directly proportional to pipe wall roughness and independent of Reynolds number

TRUE ANSWER : ?
YOUR ANSWER : ?

Choose the wrong statement

when in equilibrium, fluids cannot sustain tangential forces

when in equilibrium, fluids can sustain shear forces

fluids conform to the shape of the con-taining vessels

fluids are capable of flowing

TRUE ANSWER : ?
YOUR ANSWER : ?

The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)

1/3 R

1/2 R

2/3 R

3/4 R

TRUE ANSWER : ?
YOUR ANSWER : ?

True one-dimensional flow occurs when

the direction and magnitude of the veiocity at all points are identical

the magnitude and direction of the velocity do not change from point to point in the fluid

the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following the friction drag is generally larger than pressure drag?

a circular disc or plate held normal to flow

an airfoil

a sphere

a cylinder

TRUE ANSWER : ?
YOUR ANSWER : ?

Pressure of the order of 10''' torr can be measured by

Micro-manometer

Pirani Gauge

ionisastion gauge

Bourdon tube

TRUE ANSWER : ?
YOUR ANSWER : ?