Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. The viscosity of a fluid varies with
a. temperature
b. pressure
c. temperature, pressure and density
d. temperature and pressure
e. density
Q. When a fluid is at rest, the shear stress is
a. unpredictable
b. 8.3
c. zero
d. maximum
e. between zero and maximum
Q. Which of the following statement regarding the buoyant force is incorrect?
a. Buoyant force has no horizontal component
b. The magnitude of the buoyant force is equal to the weight of fluid displaced by the body
c. The buoyant force acts through the centre of gravity of the body
d. None of the above
Q. In laminar flow through a pipe, discharge varies
a. Linearly as the viscosity
b. Linearly as pipe diameter
c. Inversely s the viscosity
d. Linearly as the pressure drop
e. None of the above
Q. A normal shockwave is analogous to
a. open channel flow with Fr < 1.0
b. hydraulic jump
c. a small amplitude wave in open channels
d. open channel flow with Fr > 1.0
Q. The normal stress is the same in all directions at a point in fluid
a. Only when the fluid has zero viscosity and is at rest
b. When there is no motion of one fluid layer relative to an adjacent layer
c. Regardless of the motion of one fluid layer relative to an adjacent layer
d. Only when the fluid is frictionless
e. Only when fluid is frictionless and incompressible
Q. A critical depthmeter is always
a. Associated with water hammer
b. Associated with steep gradient
c. Associated with hydraulic jump
d. Associated with surge
e. Associated with tranquil flow
Q. The generating capacity of world's largest capacity hydroelectric plant is of the order of
a. 3000 MW
b. 5000 MW
c. 2000 MW
d. 1000 MW
e. 4000 MW
Q. Which of the following will resist shear and its rate of deformation will be zero regardless of loading?
a. 51.3
b. Ideal fluid
c. Newtonian fluid
d. Elastic solid
e. Ideal plastic
Q. A pressure of 500 kPa applied to 2 m3 if liquid results in a volume change of 0.004 m3. The bulk modulus, in Mpa, is
a. 2500
b. 2.5
c. 2.5 x 106
d. 25
e. 250
Q. If the absolute pressure at a point in a hydraulic system is less than atmospheric pressure, the point is said to possess
a. Gross positive head
b. Absolute positive head
c. Negative head
d. Manometric head
e. Positive head
Q. Hydraulic jump occurs when
a. Flow is sub-critical
b. Adequate downstream depth is available
c. Flow is supercritical and adequate downstream depth is available
d. Flow is sub-critical and adequate down streamdepth is available
e. Flow is supercritical