Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. The depth of oil having specific gravity 0.6 to produce a pressure of 3.6 kg/cm2 will be
a. 36 m of oil
b. 50 m of oil
c. 60 m of oil
d. 40 m of oil
e. 120 m of oil
Q. A flow in which each liquid particle has a definite path and their paths do not cross each other is called
a. Steady flow
b. Uniform flow
c. Stream line flow
d. Turbulent flow
e. None of the above
Q. The losses in an open channel vary
a. Inversely as the hydraulic radius
b. As the velocity
c. Inversely with a gradient
d. As the square of velocity
e. As the cube of velocity
Q. The existence of velocity potential in fluid indicates that
a. the flow is rotational
b. the vorticity must be non-zero
c. the circulation around any closed curve must have a definite value
d. the vorticity must be zero
Q. Pressure drag results from
a. 10
b. Deformation drag
c. development
d. Skin friction
e. Occurrence of a wake
Q. Density in terms of viscosity is
a. Kinematic viscosity/Dynamic viscosity
b. Dynamic viscosity/Kinematic viscosity
c. Kinematic viscosity x dynamic viscosity
d. Any of the above
e. None of the above
Q. In axial flow turbines
a. Water enters radially but leaves axially
b. Water enters axially but leaves radially
c. Water enters at an angle but leaves axially
d. Water enters axially and leaves axially
e. None of the above
Q. A low pressure of the order of 10-10 torr is to be measured in a chamber. Which of the following device can be used for this?
a. McLeod gauge
b. Pirani gauge
c. Manometer
d. Bourdon vacuum gauge
e. Ionisation chamber
Q. When the dynamic viscosity of a fluid is 0.6 poise and specific gravity is 0.6, the kinematic viscosity of that fluid will be
a. 0.36 poise
b. 0.6 poise
c. 1 poise
d. None of the above
e. More than 20?
Q. The centre of pressure of a fully submerged body is almost always located
b. above the centroid
c. at the centroid
d. closer to the centroid
e. bolow the centroid
Q. A hot wire anemometer is used for the measurement of
a. Viscosity of liquids
b. Viscosity of gases
c. Pressure of gases
d. Density of liquids
e. Velocity of gases
Q. Spouting velocity is
a. Ideal velocity of jet
b. 50% of ideal velocity of jet
c. Actual velocity of jet
d. Velocity of jet under some specified conditions
e. None of the above
Q. A concrete masonry block on a hill side for supporting and fixing the penstock is known as
a. Anchor block
b. Support block
c. Concrete block
d. Base block
e. Any of the above