5981. For laminar flow through a closed conduit
Vmax = 2Vav
Vmax = Vav
Vmax = 1.5Vav
Vmax = 0.5Vav
✅ The correct answer is option A.
Chemical Engineering
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5982. Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate.
Elastic
Viscous
Gravity
None of these
✅ The correct answer is option A.
5983. A piezometer opening measures the __________ fluid pressure.
Static
Undisturbed
Total
Dynamic
✅ The correct answer is option B.
5984. The discharge through a semi-circular weir varies as (where, H = Head of liquid.)
H
H2
H3/2
H1/2
✅ The correct answer is option B.
5985. The pressure and power requirement of a gas fan at constant speed & capacity varies __________ the gas density.
Directly as
Inversely as square root of
Inversely as
As square of
✅ The correct answer is option A.
5986. Water hammer in a pipeline results from the
Bursting of pipelines due to closure by a valve
Rapid pressure change due to a rapid change in the rate of flow
Pressure increase due to closure of a valve resulting in decrease in rate of flow
None of these
✅ The correct answer is option B.
5987. Hydraulic radius is the ratio of
Wetted perimeter to flow area
Flow area to wetted perimeter
Flow area to square of wetted perimeter
Square root of flow area to wetted perimeter
✅ The correct answer is option B.
5988. A lubricant 100 times more viscous than water would have a viscosity (in Pa.s)
0.01
0.1
1
10
✅ The correct answer is option B.
5989. In which of the following cases, it is possible for flow to occur from low pressure to high pressure?
Flow of liquid upward in a vertical pipe
Flow through a converging section
Flow of air downward in a pipe
Impossible in a constant cross-section conduit
✅ The correct answer is option B.
5990. Euler’s equation of motion is a statement expressing
Conservation of mass
Conservation of energy
Newton’s first law of motion
Newton’s second law of motion
✅ The correct answer is option A.