Lies above the centroid of the plane surface
Is independent of the specific weight of the fluid
Is different for different fluids
Is at the centroid of the plane surface
✅ The correct answer is option B.
Fluid Mechanics MCQs
A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the new discharge will be __________ litres/minute.
500
200
1000
750
✅ The correct answer is option A.
In which of the following cases, it is possible for flow to occur from low pressure to high pressure?
Flow of liquid upward in a vertical pipe
Flow through a converging section
Flow of air downward in a pipe
Impossible in a constant cross-section conduit
✅ The correct answer is option B.
Euler’s equation of motion is a statement expressing
Conservation of mass
Conservation of energy
Newton’s first law of motion
Newton’s second law of motion
✅ The correct answer is option A.
Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the
Drag on particles
Drag on coloumn walls
Bed height
Bed voidage
✅ The correct answer is option C.
In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )
1/√T
1/T
√T
T
✅ The correct answer is option C.
The ratio of inertial forces to viscous forces is called the __________ number.
Weber
Mach
Froude
Reynold
✅ The correct answer is option D.
The momentum correction factor for the velocity distribution of laminar flow is
1.3
1.66
2.5
None of these
✅ The correct answer is option D.
A hydraulic accumulator comprises of
A storage device and a control valve
A cylinder and a plunger
Two pistons and two cylinders
A storage tank and a ram pump
✅ The correct answer is option B.
A fluid is a substance, that
Has to be kept in a closed container
Is almost incompressible
Has zero shear stress
Flows when even a small shear is applied to it
✅ The correct answer is option D.