351. A piezometer tube is used only for measuring
low pressure
high pressure
moderate pressure
vacuum pressure
✅ The correct answer is option C.
Hydraulics and Fluid Mechanics MCQs
352. A moving fluid mass may be brought to a static equilibrium position, by aplying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called
Pascal’s law
Archimede’s principle
D-Alembert’s principle
none of these
✅ The correct answer is option C.
353. The total energy of a liquid particle in motion is equal to
pressure energy + kinetic energy + potential energy
pressure energy – (kinetic energy + potential energy)
potential energy – (pressure energy + kinetic energy
kinetic energy – (pres
✅ The correct answer is option A.
354. The divergent portion of a venturimeter is made longer than convergent portion in order to
avoid the tendency of breaking away the stream of liquid
to minimise frictional losses
both (a) and (b)
none of these
✅ The correct answer is option C.
355. According to equation of continuity,
w1a1 = w2a2
w1v1 = w2v2
a1v1 = a2v2
a1/v1 = a2/v2
✅ The correct answer is option C.
356. The coefficient of discharge for an external mouthpiece is
0.375
0.5
0.707
0.855
✅ The correct answer is option D.
357. An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch.
1%
1.50%
2%
2.50%
✅ The correct answer is option D.
358. The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
The bodies A and B have equal stability
The body A is more stable than body B
The body B is more stable than body A
The bodies A and B are unstable
✅ The correct answer is option C.
359. 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.
360. The pressure measured with the help of a piezometer tube is in
N/mm2
N/m2
head of liquid
all of these
✅ The correct answer is option C.