Top 350+ Solved Hydraulics and Fluid Mechanics MCQ Questions Answer
Q. Buoyant force is
a. The resultant force acting on a floating body
b. The resultant force on a body due to the fluid surrounding it
c. Equal to the volume of liquid displaced
d. The force necessary to maintain equilibrium of a submerged body
Q. A flow through a long pipe at decreasing rate is called __________ uniform flow.
a. Steady
b. Unsteady
c. Both A and B
d. None of these
Q. Choose the wrong statement
a. The center of buoyancy is located at the center of gravity of the displaced liquid
b. For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy
c. If C.G. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions
d. All floating bodies are stable
Q. The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.
a. Equal
b. Directly proportional
c. Inversely proportional
d. None of these
Q. The discharge in an open channel corresponding to critical depth is
a. Zero
b. Minimum
c. Maximum
d. None of these
Q. A pitot tube is used to measure the
a. Velocity of flow at the required point in a pipe
b. Pressure difference between two points in a pipe
c. Total pressure of liquid flowing in a pipe
d. Discharge through a pipe
Q. The total energy of each particle at various places in the case of perfect incompressible fluidflowing in continuous stream
a. Keeps on increasing
b. Keeps on decreasing
c. Remain constant
d. May increase/decrease
Q. The critical depth meter is used to measure
a. Velocity of flow in an open channel
b. Depth of flow in an open channel
c. Hydraulic jump
d. Depth of channel
Q. Two pipe systems can be said to be equivalent, when the following quantities are same
a. Friction loss and flow
b. Length and diameter
c. Flow and length
d. Friction factor and diameter
Q. In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome theviscous resistance will be
a. Double
b. Four times
c. Eight times
d. Sixteen times
Q. The value of bulk modulus of a fluid is required to determine
a. Reynold's number
b. Froude's number
c. Mach number
d. Euler's number
Q. Fluid is a substance which offers no resistance to change of
a. Pressure
b. Flow
c. Shape
d. Volume
Q. The pressure less than atmospheric pressure is known as
a. Suction pressure
b. Vacuum pressure
c. Negative gauge pressure
d. All of these
Q. The normal stress in a fluid will be constant in all directions at a point only if
a. It is incompressible
b. It has uniform viscosity
c. It has zero viscosity
d. It is at rest