RRB/SSC JE Mech: Engg. Fluid Mechanics Quiz 4

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Question 1

A 20cm dia pipe carries a fluid with kinematic viscosity of 0.20 stokes. If the flow has to be critical at R_e= 2000, what is the corresponding velocity of flow?

• A20.00 m/s
• B10.00 m/s
• C0.20 m/s
• D00.10 m/s

Question 2

Velocity measurement of flow through a rough circular pipe indicate that the average velocity is 3.0 m/s and the centerline velocity is 3.5 m/s. What is the friction factor for the pipeline?

• A0.0253
• B0.0458
• C0.01562
• D0.0984

Question 3

Which of the following pressure gauge is generally used for the calibration of other pressure measuring gauges ______.

• ABourdon's tube pressure gauge
• BDiaphragm pressure gauge
• CDead weight pressure gauge
• DManometer gauge

Question 4

A piezometer and a Pilot tube are tapped into a horizontal water pipe, as shown in figure. The velocity of water at the center of the pipe is

• A2.4 m/s
• B1.53 m/s
• C2.07 m/s
• D1.93 m/s

Question 5

A liquid of density 1200 kg/ is flowing steadily through a tube of varying cross section as shown below. The cross section at point A is 1 and at B is 20 . The points A and B are in the same horizontal plane. The speed of liquid at point A is 10 cm/sec. The difference of pressure at A and B is

• A100 Pa
• B170 Pa
• C144 Pa
• D180 Pa

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