601. In which of the following body shapes, the pressure drag is large compared to the friction drag?
Stream line body
Two dimensional body
Bluff body
None of these
✅ The correct answer is option C.
Fluid Mechanics MCQs
602. For an unstable equilibrium of a floating body (where, M = metacentre.)
M is above G
M is below G
M & G coincide
None of these
✅ The correct answer is option B.
603. A free jet of water of cross-sectional area 0.01m² and a velocity of 20 m/s strikes a plate and then flows in a plane parallel to the plate as shown in the figure below. The horizontal component of the force on the support is
200 N
400 N
2000 N
4000 N
✅ The correct answer is option D.
605. Which is not a variable head meter?
Venturimeter
Pitot tube
Rotameter
None of these
✅ The correct answer is option C.
606. In a/an __________ , the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure.
Rotameter
Pitot tube
Venturimeter
Flow nozzle
✅ The correct answer is option B.
607. What is the shear rate at the pipe wall, in case of laminar flow of Newtonion fluids in a pipe of diameter ‘D’ & length ‘L’ incurring a pressure drop ‘Δp’ with average velocity ‘Vavg’?
D Δp/8L
D Δp/4L
8 . Vavg/D
4 . Vavg/D
✅ The correct answer is option C.
608. Which of the following is most prone to pulsating discharge flow ?
Centrifugal pump
Reciprocating pump
Gear pump
Axial flow pump
✅ The correct answer is option C.
609. The Reynolds number for an ideal fluid flow is
4
2100-4000
4000
∞
✅ The correct answer is option D.
610. An isentropic process is the one, in which
pv = constant
pvr = constant
pvr = constant, and process is reversible
None of these
✅ The correct answer is option C.