101. In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)
P / 2sinα
✅ The correct answer is option C.
Hydraulics and Fluid Mechanics MCQs
102. The specific weight is also known as weight density.
Correct
Incorrect
✅ The correct answer is option A.
103. The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)
w
wh
w/h
h/w
✅ The correct answer is option B.
104. The flow of water through the hole in the bottom of a wash basin is an example of
steady flow
uniform flow
free vortex
forced vortex
✅ The correct answer is option C.
105. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.
H/3
H/2
2H/3
3H/4
✅ The correct answer is option C.
106. The mercury does not wet the glass. This is due to the property of the liquid known as
cohesion
adhesion
viscosity
surface tension
✅ The correct answer is option D.
107. The highest efficiency is obtained with a channel of __________ section.
circular
square
rectangular
trapezoidal
✅ The correct answer is option D.
108. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
one-half
one-third
two-third
✅ The correct answer is option B.
109. The buoyancy depends upon the
weight of the liquid displaced
pressure with which the liquid is displaced
viscosity of the liquid
compressibility of the
✅ The correct answer is option A.
110. The pressure measured with the help of a pressure gauge is called
atmospheric pressure
gauge pressure
absolute pressure
mean pressure
✅ The correct answer is option B.