500 Best Hydraulics MCQ
Q81). Fluids change the volume under external presssure due to
a).plasticity
b).viscosity
c).compressibility
d).none of these.
Correct Answer:
compressibility
Explanation:
Q82). Discharge over an ogee weir remains the same as that of
a).sharp crested weir
b).triangular weir
c).cippoletti weir
d).drowned weir.
Correct Answer:
cippoletti weir
Explanation:
Q83). When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as
a).free nappe
b).depressed nappe
c).clinging nappe
d).none of these.
Correct Answer:
clinging nappe
Explanation:
Q84). The best side slope for most economical trapezoidal section, is
a).30°
b).45°
c).60°
d).None of these.
Correct Answer:
60°
Explanation:
Q85). The following is not a laminar flow
a).Flow of oil in measuring instruments
b).Flow in beds in ground water
c).Rise of water in plants through roots
d).Flow in water pipe lines.
Correct Answer:
Flow in water pipe lines.
Explanation:
Q86). Which one of the following statements is true ?
a).The value of kinetic energy correction factor for turbulent flow lies between 1.03 to 1.06
b).The value of kinetic energy correction factor for laminar flow is 2
c).The practical value of kinetic energy correction factor for turbulent flow is unity
d).all the above.
Correct Answer:
all the above.
Explanation:
Q87). Molecules of fluids get attracted due to
a).capillarity action
b).surface tension
c).adhesion
d).cohesion
Correct Answer:
adhesion
Explanation:
Q88). Cappoletti weir is a
a).rectangular weir whose length is kept 3 times the height of the water above sill
b).triangular weir whose notch angle is 90°
c).trapezoidal weir, whose sides slope 1 horizontal to 2 verticals
d).a combination of rectangular and triangular weirs.
Correct Answer:
trapezoidal weir, whose sides slope 1 horizontal to 2 verticals
Explanation: