suction pressure
vacuum pressure
negative gauge pressure
all of these
✅ The correct answer is option D.
Hydraulics and Fluid Mechanics MCQs
The total energy line lies over the hydraulic gradient line by an amount equal to the
pressure head
velocity head
pressure head + velocity head
pressure head – velocity head
✅ The correct answer is option B.
The weight per unit volume of a liquid at a standard temperature and pressure is called
specific weight
mass density
specific gravity
none of these
✅ The correct answer is option A.
A manometer is used to measure
low pressure
moderate pressure
high pressure
atomospheric pressure
✅ The correct answer is option C.
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)
Cd 2g x H
Cd 2g x H3/2
Cd 2g x H2
Cd 2g x H5/2
✅ The correct answer is option D.
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)
Cd x b2gH
Cd x b2g x H
Cd x b2g x H3/2
Cd x b2g x H2
✅ The correct answer is option C.
Which of the following is an example of laminar flow?
Under ground flow
Flow past tiny bodies
Flow of oil in measuring instruments
all of these
✅ The correct answer is option D.
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 per unit length is (where w = Specific weight of liquid, and H = Height of liquid)
wH
wH/2
wH2/2
wH2/3
✅ The correct answer is option C.