Hydraulic Fluid Mechanics MCQs

Question 1

The non-dimensional factor governing viscous or frictional resistance is

Accepted Answer

Mach number

Answer

Reynolds number

Answer

Weber. number

Answer

Froude number

Question 2

Euler's dimensionless number relates

Accepted Answer

Pressure force and inertia force

Answer

Pressure force and viscous force

Answer

Inertia forde and gravity force

Answer

Buoyancy force and viscous force

Question 3

The rate of change of linear momentum equals

Accepted Answer

Active force

Answer

Reactive force

Answer

Torque

Answer

Work done

Question 4

Mach number is the ratio of inertial force to

Accepted Answer

Gravitation force

Answer

Surface tension

Answer

Elasticity

Answer

Viscosity

Question 5

Mach number greater than unity implies that the flow is

Accepted Answer

Supersonic

Answer

Sonic

Answer

Subsonic

Answer

Hypersonic

Question 6

The component of the force of the fluid on the body (which is generally inclined to the direction of motion of the body) parallel to the direction of motion is called

Accepted Answer

Drag

Answer

Lift

Answer

Wake

Answer

(e) thrust.

Question 7

The rate of change of moment of momentum represents the

Accepted Answer

Torque applied by the fluid

Answer

Force exerted by fluid

Answer

Work done by the fluid

Answer

Power developed by the fluid

Question 8

Reynolds number is the ratio of intertial force to

Accepted Answer

(e) none of the above.

Answer

Gravitational force

Answer

Surface tension

Answer

Elasticity

Question 9

The energy loss in flow through nozzle as compared to venturhneter is

Accepted Answer

More

Answer

Same

Answer

Less

Answer

More/less depending on flow