Fluid Mechanics MCQs

Greatly affected by moderate changes in pressure

Greatly affected only by moderate changes in temperature

Not affected with moderate change in temperature & pressure

Sensible to changes in both temperature & pressure

(ρH – ρair)gH

(ρH – ρL)gH

(ρH – ρL) gH + (ρL – ρair) . g(L – H)

(ρH – ρL) gL + (ρL – ρair)gH

At high pressure

In bends

For controlling water flow

For unidirectional flow

High capacity at high heads

High capacity at low heads

Low capacity at high heads

Low capacity at low heads

G is above B

B is above G

B & G coincide

None of these

Reciprocating

Plunger

Electromagnetic

Gear

U-tube water

U-tube mercury

Inclined tube mercury

Inclined tube water

Depends only on Reynolds number

Does not depend on Reynolds number

Depends on the roughness

None of these

Fluid characteristics

Particle size

Both A and B

Neither A nor B

√(2gh)

C.V. √(2gh)

Cd √(2gh)

Cc √(2gh)