500 Best Hydraulics MCQ
Q177). The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called
a).path line
b).stream line
c).potential line
d).streak line.
Correct Answer:
stream line
Explanation:
Q178). A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of f= 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is
a).2.4 cm
b).2.5 cm
c).2.6 cm
d).2.7 cm.
Correct Answer:
2.5 cm
Explanation:
Q179). When the whole fluid mass rotates either due to fluid pressure or gravity or rotation previously imparted, the motion is known as
a).free vortex
b).forced vortex
c).non-potential vortex
d).rotational vortex.
Correct Answer:
free vortex
Explanation:
Q180). The ratio of the maximum height to which a jet inclined through θ rises to its total horizontal span is
a). 1/4 sin θ
b). 1/4 cos θ
c). 1/4 tan θ
d). 1/4 cot θ.
Correct Answer:
1/4 tan θ
Explanation:
Q181). For solving the problems is hydraulic engineering, the velocity used is
a).velocity at the centre of pipe section
b).average velocity of flow over a section
c).mean of the velocities at the centre and that along the pipe surface
d).none of these.
Correct Answer:
average velocity of flow over a section
Explanation:
Q182). The shape of fire hose nozzle is generally kept
a).divergent
b).convergent
c).convergent divergent
d).cylindrical.
Correct Answer:
convergent
Explanation:
Q183). The dimensions MLT-2 refers to
a).specific weight
b).force
c).discharge
d).none of these.
Correct Answer:
force
Explanation:
Q184). The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as
a).hydraulic gradient
b).piezometric line
c).pressure grade line
d).All of these.
Correct Answer:
All of these.
Explanation: