281. Turbulent flow takes place at high velocities.
Agree
Disagree
✅ The correct answer is option A.
Hydraulics and Fluid Mechanics MCQs
282. The discharge over a rectangular weir, considering the velocity of approach, is (where H1 = Total height of water above the weir = H + Ha H = Height of water, over the crest of the weir, and Ha = Height of water, due to velocity of approach)
Cd x L2g [H1 – Ha]
Cd x L2g [H13/2 – Ha3/2]
Cd x L2g [H12 – Ha2]
Cd x L2g [H15/2 – Ha5
✅ The correct answer is option B.
283. Barometer is used to measure
velocity of liquid
atmospheric pressure
pressure in pipes and channels
difference of pressure
✅ The correct answer is option B.
284. When the Mach number is more than 6, the flow is called
sub-sonic flow
sonic flow
super-sonic flow
hyper-sonic flow
✅ The correct answer is option D.
285. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as
lift
drag
stagnation pressure
bulk modulus
✅ The correct answer is option B.
286. When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid
remains horizontal
becomes curved
falls on the front end
falls on the back end
✅ The correct answer is option C.
287. The force per unit length is the unit of
surface tension
compressibility
capillarity
viscosity
✅ The correct answer is option A.
288. Venturimeter is used to
measure the velocity of a flowing liquid
measure the pressure of a flowing liquid
measure the discharge of liquid flowing in a pipe
measure the pressure d
✅ The correct answer is option C.
289. The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is
0.0116 stoke
0.116 stoke
0.0611 stoke
0.611 stoke
✅ The correct answer is option A.
290. The flow in a pipe is laminar, when Reynold number is less than 2000.
TRUE
FALSE
✅ The correct answer is option A.