FLUID MECHANICS QUIZ

A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is

< Δp

Δp²

> Δp

Δp

TRUE ANSWER : ?
YOUR ANSWER : ?

Steady flow occurs, when the

Rate of the velocity change is constant

Conditions change steadily with time

Conditions do not change with time at any point

Conditions are the same at the adjacent points at any instant

TRUE ANSWER : ?
YOUR ANSWER : ?

A lubricant 100 times more viscous than water would have a viscosity (in Pa.s)

10

0.1

0.01

1

TRUE ANSWER : ?
YOUR ANSWER : ?

The Stoke's stream function applies to the

Ideal/non-viscous fluids only

None of these

Irrotational flow only

Cases of axial symmetry

TRUE ANSWER : ?
YOUR ANSWER : ?

Delivery of insufficient quantity of liquid by a pump may be caused by

All of these

Low rpm

Air leak in the inlet

Too high a lift

TRUE ANSWER : ?
YOUR ANSWER : ?

A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is __________ hp.

20363

1

20090

5.5

TRUE ANSWER : ?
YOUR ANSWER : ?

A hydraulic ram acts as a/an __________ pump.

Parallel cylinder

Reciprocating

Impulse

Centrifugal

TRUE ANSWER : ?
YOUR ANSWER : ?

For the transfer of solution of thick slurry, the pump used is a __________ pump.

Gear

Centrifugal

Reciprocating

Diaphragm

TRUE ANSWER : ?
YOUR ANSWER : ?

The value of critical Reynolds number for pipe flow is

1300

10000

100000

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The Mach number for hypersonic flow of compressible fluid is

> 1

> 4

< 2

1

TRUE ANSWER : ?
YOUR ANSWER : ?

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