Drag stress to inertial stress
Inertial stress to drag stress
Inertial stress to gravitational stress
Gravitational stress to drag stress
✅ The correct answer is option A.
Fluid Mechanics MCQs
The percentage slip in a reciprocating pump set is given by the % of (where, Q₁ = actual discharge Q₂ = theoretical discharge)
Q₁/Q₂
Q₂/Q₁
(Q₂ – Q₁)/Q₁
(Q₂ – Q₁)/Q₂
✅ The correct answer is option D.
The value of critical Reynolds number for pipe flow is
1300
10,000
100,000
None of these
✅ The correct answer is option A.
Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.
5
50
500
1000
✅ The correct answer is option B.
Major loss in sudden contraction in pipe flow is due to
Boundary friction
Flow contraction
Expansion of flow after sudden contraction
None of these
✅ The correct answer is option B.
For ideally incompressible fluid, the Mach number will be
1.5
1
0
5
✅ The correct answer is option B.
With increase in the schedule number of a pipe of a particular nominal size, the
Wall thickness also increases
I.of the pipe decreases
O.of the pipe remains constant
All of the above
✅ The correct answer is option D.
Gear pump
Is a positive displacement pump
Is a centrifugal pump
Is a non-positive displacement pump
Can be started with delivery valve closed
✅ The correct answer is option A.
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
H
12.6 H
13.6 H
14.6 H
✅ The correct answer is option B.
When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the __________ bed.
Spouted
Sluggish
Boiling
Teeter
✅ The correct answer is option A.