During the opening of a valve in a pipe line, the flow is___________________?

Related Mcqs:

1. To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than_______________?

   A. 2.4 m above the hydraulic gradient B. 6.4 m above the hydraulic gradient C. 10.0 m above the hydraulic gradient D. 5.0 above the hydraulic gradient E. none of the above...

2. Flow occurring in a pipeline when a valve is being opened is ______________________?

   A. steady B. unsteady C. laminar D. vortex E. rotational...

3. The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is___________________?

   A. 1.5 B. 2.0 C. 3.0 D. 4.0...

4. For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of___________________?

   A. 100 cm B. 120 cm C. 140 cm D. 160 cm...

5. The self-cleansing velocity of water flowing through pipe lines, is___________________ ?

   A. 2 metres/sec B. 1 metre/sec C. 0.5 metre/sec D. 0.25 metre/sec...

6. A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is __________________?

   A. 9,000 kg B. 13,500 kg C. 18,000 kg D. 27,000 kg E. 30,000 kg...

7. At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?

   A. minimum B. maximum C. zero D. negative value E. could be any value...

8. Flow of water in a pipe about 3 meters in diameter can be measured by_________________?

   A. orifice plate B. venturi C. rotameter D. pitot tube E. nozzle...

9. For hypersonic flow, the Mach number is___________________?

   A. unity B. greater than unity C. greater than 2 D. greater than 4 E. greater than 10...

10. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?

    A. head of water (h) B. h2 C. V/T D. h2 E. h3/1....