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Home Mechanical Engineering Hydraulic Machines See What Others Are Saying!
  • Question
  • Delivery head of water of a centrifugal pump is inversely proportional to diameter of its impeller.


  • Options
  • A. Yes
  • B. No

  • Correct Answer
  • No 


  • More questions

    • 1. Otto cycle consists of

    • Options
    • A. two constant volume and two isentropic processes
    • B. two constant pressure and two isentropic processes
    • C. two constant volume and two isothermal processes
    • D. one constant pressure, one constant volume and two isentropic processes
    • Discuss
    • 2. When coal is first dried and then crushed to a fine powder by pulverising machine, the resulting fuel is called

    • Options
    • A. wood charcoal
    • B. bituminous coal
    • C. briquetted coal
    • D. none of these
    • Discuss
    • 3. The relative efficiency is defined as the

    • Options
    • A. ratio of thermal efficiency to Rankine efficiency
    • B. ratio of brake power to the indicated power
    • C. ratio of heat equivalent to indicated power to the energy supplied in steam
    • D. product of thermal efficiency and Rankine efficiency
    • Discuss
    • 4. A perpetual motion machine of the first kind is __________ according to first law of thermodynamics.

    • Options
    • A. possible
    • B. impossible
    • Discuss
    • 5. The discharge through a turbine is

    • Options
    • A. directly proportional to H1/2
    • B. inversely proportional to H1/2
    • C. directly proportional to H3/2
    • D. inversely proportional to H3/2
    • Discuss
    • 6. Tin base white metals are used where the bearings are subjected to

    • Options
    • A. large surface wear
    • B. elevated temperatures
    • C. light load and pressure
    • D. high pressure and load
    • Discuss
    • 7. A refrigerant with the highest critical pressure is

    • Options
    • A. R-11
    • B. R-12
    • C. R-22
    • D. Ammonia
    • Discuss
    • 8. When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is

    • Options
    • A. tensile stress, tensile strain
    • B. compressive stress, compressive strain
    • C. shear stress, tensile strain
    • D. shear stress, shear strain
    • Discuss
    • 9. Diesel cycle consists of __________ processes.

    • Options
    • A. two constant volume and two isentropic
    • B. two constant pressure and two isentropic
    • C. two constant volume and two isothermal
    • D. one constant pressure, one constant volume and two isentropic
    • Discuss
    • 10. In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside.

    • Options
    • A. True
    • B. False
    • Discuss


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