161. The force of buoyancy is always __________ the weight of the liquid displaced by the body.
equal to
less than
more than
✅ The correct answer is option A.
Hydraulics and Fluid Mechanics MCQs
162. The viscosity of water at 20°C is
one stoke
one centistroke
one poise
one centipoise
✅ The correct answer is option D.
163. The Newton’s law of resistance is based on the assumption that the
planes of the body are completely smooth
space around the body is completely filled with the fluid
fluid particles do not exert any influence on one another
all of the above
✅ The correct answer is option D.
164. The velocity corresponding to Reynold number of 2000 is called
sub-sonic velocity
super-sonic velocity
lower critical velocity
higher critical veloci
✅ The correct answer is option C.
165. Poise is the unit of viscosity in C.G.S. system of units.
Agree
Disagree
✅ The correct answer is option A.
166. The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.
less than
more than
✅ The correct answer is option A.
167. The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
effects
does not effect
✅ The correct answer is option A.
168. When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure
varies as the square of the radial distance
increases linearly as its radial distance
increases as the square of the radial distance
decreases as the squar
✅ The correct answer is option A.
169. The flow in a pipe or channel is said to be non-uniform when
the liquid particles at all sections have the same velocities
the liquid particles at different sections have different velocities
the quantity of liquid flowing per second is constant
each liquid particle h
✅ The correct answer is option B.
170. The density of a liquid in kg/m3 is numerically equal to its specific gravity.
TRUE
FALSE
✅ The correct answer is option A.