Hydraulic Fluid Mechanics MCQs

Question 1

The horizontal component of force on a curved surface is equal to the

Accepted Answer

Force on a vertical projection of the curved surface

Answer

Product of pressure at its centroid and area

Answer

Weight of liquid retained by the curved area

Answer

Weight of liquid vertically above the curved surface

Question 2

The vertical component of pressure force on a submerged curved surface is equal to

Accepted Answer

Weight of liquid vertically above the curved surface and extending upon the free surface

Answer

The force on a vertical projection of the curved surface

Answer

The product of pressure at centroid and surface area

Answer

Horizontal component

Question 3

A block of ice floating over water in a vessel slowly melts in it. The water level in the vessel will

Accepted Answer

Will remain constant

Answer

Start rising

Answer

Start falling

Answer

Will depend en temperature in water

Question 4

Manning formula is used to,determine

Accepted Answer

Head loss due to friction in open channels

Answer

Head loss due to frictiOn in pipes flowing full under pressure

Answer

Flow in open channels

Answer

Flow in pipes

Question 5

In open channel corresponding to critical depth, the discharge is

Accepted Answer

Maximum

Answer

Minimum

Answer

Zero flow

Answer

Turbulent flow

Question 6

If a water tank partially filled with water is being carried on a truck moving with a constant-horizontal acceleration, the level of the liquid will

Accepted Answer

Remain the same at both the sides of the tank

Answer

Rise on the front side of the tank

Answer

Fall on the back side of the tank

Answer

Rise on the back side and fall on the front side

Question 7

The discharge through an orifice fitted in a tank can be increased by

Accepted Answer

Fitting a short length of pipe to the outside

Answer

Sharpening the edges of orifice

Answer

Fitting a long length of pipe to the outside

Answer

Fitting a long length of pipe to the inside

Question 8

When the depth of water in an open channel is greater than the critical depth then flow is said to be

Accepted Answer

Tranquil

Answer

Critical

Answer

Turbulent

Answer

Torrential

Question 9

When the depth of water in an open channel is less than the critical depth, then flow is said to be

Accepted Answer

Torrential

Answer

Critical

Answer

Turbulent

Answer

Tranquil