500 Best Hydraulics MCQ
Q161). The metacentric height of a body equals the distance between
a).the centre of gravity and centre of buoyancy
b).the metacentre and centre of gravity
c).the centre of buoyancy and metacentre
d).none of these.
Correct Answer:
the metacentre and centre of gravity
Explanation:
Q162). Discharge through a totally submerged orifice, is directly proportional to
a).difference in elevation of water surfaces
b).square root of the difference in elevation of water surface
c).square root of the opening
d).reciprocal of the area of the opening
Correct Answer:
square root of the difference in elevation of water surface
Explanation:
Q163). Frictional loss of head includes the loss of energy due to
a).viscosity
b).turbulence
c).both (a) and (b)
d).none of these.
Correct Answer:
none of these.
Explanation:
Q164). The length of hydraulic jump is roughly
a).2 to 3 times its height
b).3 to 5 times its height
c).5 to 7 times its height
d).None of these.
Correct Answer:
5 to 7 times its height
Explanation:
Q165). To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m3/sec, the length of water will be
a).2.48 m
b).2.49 m
c).2.50 m
d).2.51 m.
Correct Answer:
2.49 m
Explanation:
Q166). For a most economical trapezoidal open channel, the half of the top width must be equal to
a).the bed width
b).one sloping side
c).the depth of flow
d).None of these.
Correct Answer:
one sloping side
Explanation:
Q167). Pick up the correct statement regarding convergent divergent mouth piece from the following :
a).It converges upto Venacontracta and then diverges
b).In this mouth piece there is no loss of energy due to sudden enlargement
c).The coefficient of discharge is unity
d).All the above.
Correct Answer:
All the above.
Explanation:
Q168). The value of kinetic energy correction factor () for a laminar flow through a circular pipe, is
a).0.5
b).1
c).l.5
d).2
Correct Answer:
2
Explanation: