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  • Question

  • The torque required to overcome viscous resistance of a footstep bearing is (where ? = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)


  • Options
  • A. The torque required to overcome viscous resistance of a footstep bearing is (where ? = Viscosity of
  • B. The torque required to overcome viscous resistance of a footstep bearing is (where ? = Viscosity of
  • C. The torque required to overcome viscous resistance of a footstep bearing is (where ? = Viscosity of
  • D. The torque required to overcome viscous resistance of a footstep bearing is (where ? = Viscosity of

  • Correct Answer
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    • Hydraulics and Fluid Mechanics problems

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    • 1. If the value of coefficient of discharge increases, the discharge through the orifice decreases.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Falling drops of water become spheres due to the property of

    • Options
    • A. surface tension of water
    • B. compressibility of water
    • C. capillarity of water
    • D. viscosity of water
      • Discuss
    • 3. Water is a __________ fluid.

    • Options
    • A. real
    • B. ideal
    • C. newtonian
    • D. non-newtonian
      • Discuss
    • 4. The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is

    • Options
    • A. 0.0116 stoke
    • B. 0.116 stoke
    • C. 0.0611 stoke
    • D. 0.611 stoke
      • Discuss
    • 5. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 6. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 7. The pressure of the liquid flowing through the divergent portion of a venturimeter

    • Options
    • A. remains constant
    • B. increases
    • C. decreases
    • D. depends upon mass of liquid
      • Discuss
    • 8. When the Mach number is between __________ the flow is called super-sonic flow.

    • Options
    • A. 1 and 2.5
    • B. 2.5 and 4
    • C. 4 and 6
    • D. 1 and 6
      • Discuss
    • 9. A manometer is used to measure

    • Options
    • A. atmospneric pressure
    • B. pressure in pipes and channels
    • C. pressure in venturimeter
    • D. difference of pressures between two points in a pipe
      • Discuss
    • 10. The product of mass and accelaration of flowing liquid is called

    • Options
    • A. inertia force
    • B. viscous force
    • C. gravity force
    • D. pressure force
      • Discuss

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