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  • Question
  • Water flows through a convergent mouthpiece of diameter 4 cm at convergence under a head of 3 metres. If the maximum vacuum pressure is 9 metres of water, the maximum diameter of divergence, to aviod separation of flow, is


  • Options
  • A. 4 cm
  • B. 6 cm
  • C. 2 cm
  • D. 23 cm.

  • Correct Answer
  • 2 cm 


  • More questions

    • 1. The c.g. of the shaded area of the below figure from the x-axis is

    • Options
    • A.
    • B.
    • C.
    • D.
    • E.
    • Discuss
    • 2. A single angle in tension is connected by one leg only. If the areas of connecting and outstanding legs are respectively a and b, net effective area of the angle, is

    • Options
    • A.
    • B.
    • C.
    • D.
    • E. none of these.
    • Discuss
    • 3. Maximum size of clay particles, is :

    • Options
    • A. 0.002 mm
    • B. 0.04 mm
    • C. 0.06 mm
    • D. 0.08 mm
    • E. 1 mm
    • Discuss
    • 4. A water treatment plant is required to process 28800 m3/d of raw water (density = 1000 kg/m3, kinematic viscosity = 10-6 m2/s). The rapid mixing tank imparts tank a velocity gradient of 900s-1 to blend 35 mg/l of alum with the flow for a detention time of 2 minutes. The power input (W) required for rapid mixing is

    • Options
    • A. 32.4
    • B. 36
    • C. 324
    • D. 32400
    • Discuss
    • 5. Drop manholes are the manholes

    • Options
    • A. without entry ladders
    • B. without manhole covers
    • C. with depths more than 3.5 m
    • D. having drains at different levels.
    • Discuss
    • 6. Polaris is usually observed for the determination of the azimuth when it is

    • Options
    • A. at culmination
    • B. at elongation
    • C. neither at culmination nor at elongation
    • D. either at culmination or at elongation.
    • Discuss
    • 7. The low voltage porcelain is mainly used for

    • Options
    • A. switch block
    • B. insulating tubes
    • C. lamp sockets
    • D. All of these.
    • Discuss
    • 8. Design of flexible pavements is based on

    • Options
    • A. mathematical analysis
    • B. empirical formulae
    • C. a compromise of pure theory and pure empirical formula
    • D. none of these.
    • Discuss
    • 9. The stress at which extension of a material takes place more quickly as compared to the increase in load, is called

    • Options
    • A. elastic point
    • B. plastic point
    • C. breaking point
    • D. yielding point.
    • Discuss
    • 10. Rail section is generally designated by its

    • Options
    • A. total weight
    • B. total length
    • C. weight per metre length
    • D. area of its cross-section.
    • Discuss


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