371. An ideal fluid is frictionless and incompressible.
Correct
Incorrect
✅ The correct answer is option A.
Hydraulics and Fluid Mechanics MCQs
373. The Reynold’s number of a ship is __________ to its velocity and length.
directly proportional
inversely proportional
✅ The correct answer is option A.
374. A flow in which the volume of a fluid and its density does not change during the flow is called __________ flow.
incompressible
compressible
✅ The correct answer is option A.
375. The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.
Agree
Disagree
✅ The correct answer is option A.
376. In a venturimeter, the velocity of liquid at throat is __________ than at inlet.
higher
lower
✅ The correct answer is option A.
377. The maximum discharge over a broad crested weir is
0.384 Cd x L x H1/2
0.384 Cd x L x H3/2
1.71 Cd x L x H1/2
1.71 Cd x L x H3/2
✅ The correct answer is option D.
378. The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.
equal to
less than
more than
✅ The correct answer is option B.
379. The coefficient of viscosity may be determined by
[A]. capillary tube method
[B]. orifice type viscometer
[C]. rotating cylinder method
[D]. all of these
✅ The correct answer is option D.
380. A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
[A]. equal to.
[B]. less than
[C]. more than
null
✅ The correct answer is option C.