500 Best Hydraulics MCQ
Q145). An orifice is called a large orifice if water head, is
a).twice the diameter of the orifice
b).thrice the diameter of the orifice
c).four times the diameter of the orifice
d).five times the diameter of the orifice.
Correct Answer:
five times the diameter of the orifice.
Explanation:
Q146). When a liquid rotates at constant angular velocity about a vertical axis of a rigid body, the pressure
a).increases linearly to its radial distance
b).varies inversely as the altitude along any vertical line
c).varies as the square of the radial distance
d).decreases as the square of the radial distance
Correct Answer:
varies as the square of the radial distance
Explanation:
Q147). For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is
a).6 m/sec
b).8 m/sec
c).10 m/sec
d).12 m/sec
Correct Answer:
10 m/sec
Explanation:
Q148). A floating body attains stable equilibrium if its metacentre is
a).at the centroid
b).above the centroid
c).below the centroid
d).anywhere.
Correct Answer:
above the centroid
Explanation:
Q149). An ideal fluid
a).is frictionless and incompressible
b).obeys Newton’s law of velocity
c).is similar to gas
d).is very viscous.
Correct Answer:
is frictionless and incompressible
Explanation:
Q150). In C.G.S. system the units of kinematic viscosity, is
a).stoke
b).poise
c).Newton
d).none of these.
Correct Answer:
stoke
Explanation:
Q151). A triangular notch is preferred to a rectangular notch because
a).only one reading is required
b).its formula is simple to remember
c).it gives more accurate results for low discharge
d).all of the above.
Correct Answer:
all of the above.
Explanation:
Q152). In case of laminar flow through a circular pipe,
a).momentum correction factor is 1.33
b).energy correction factor is 2.00
c).both (a) and (b)
d).Neither (a) nor (b).
Correct Answer:
both (a) and (b)
Explanation: