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  • Question

  • The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is


  • Options
  • A. 24.8 r.p.m.
  • B. 48.2 r.p.m
  • C. 82.4 r.p.m.
  • D. 248 r.p.m

  • Correct Answer
  • 82.4 r.p.m. 

    • More questions

    • 1. A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called

    • Options
    • A. steady flow
    • B. uniform flow
    • C. streamline flow
    • D. turbulent flow
      • Discuss
    • 2. A simply supported beam 'A' of length l, breadth b and depth d carries a central point load W. Another bream 'B' has the same length and breadth but its depth is doubled. The deflection of beam 'B' will be double as compared to beam 'A'.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 3. The ability of a material to undergo large permanent deformation with the application of a tensile force, is called ductility.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 4. The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to

    • Options
    • A. inject fuel in a chamber of high pressure at the end of compression stroke
    • B. inject fuel at a high velocity to facilitate atomisation
    • C. ensure that penetration is not high
    • D. all of the above
      • Discuss
    • 5. The energy possessed by a body, for doing work by virtue of its position, is called

    • Options
    • A. potential energy
    • B. kinetic energy
    • C. electrical energy
    • D. chemical energy
      • Discuss
    • 6. The average time recorded by work study man for an operation is called

    • Options
    • A. standard time
    • B. normal time
    • C. representative time
    • D. none of these
      • Discuss
    • 7. The material of pipe lines for a system using freon as a refrigerant should be

    • Options
    • A. brass
    • B. copper
    • C. steel
    • D. aluminium
      • Discuss
    • 8. Manganese bronze has

    • Options
    • A. good wearing qualities and high elasticity
    • B. high yield point, high fatigue limit and excellent cold and hot corrosion resistance
    • C. high resistance to corrosion
    • D. valuable cold working property
      • Discuss
    • 9. The frequency of oscillation of a compound pendulum is(where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. Frequency of vibrations means the number of cycles per second.

    • Options
    • A. Yes
    • B. No
      • Discuss

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