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

Related Mcqs:

1. 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

2. 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

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

   A. steady
   B. unsteady
   C. uniform
   D. laminar
   E. free vortex type

4. 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

5. To avoid an interruption in the flow of a syphon, an air vessel is provided______________?

   A. at the inlet
   B. at the outlet
   C. at the summit
   D. ay nay point between inlet and outlet
   E. none of the above

6. In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

   A. 100 mm dia.
   B. 150 mm dia.
   C. 225 mm dia.
   D. All of these

7. 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

8. Two pipe systems can be said to be equivalent, when the following quantites are same______________?

   A. friction loss and flow
   B. length and diameter
   C. flow and length
   D. friction factor and diameter
   E. velocity and diameter

9. 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

10. Antisyphonage pipe is fitted_______________?

    A. At the end of septic tanks
    B. On manholes
    C. With a W.C. trap
    D. At the beginning of sewer line