Fluid Mechanics Question And Answers | Fluid Mechanics Internship | Interview Question For Fresher’s | Interview Question For Fluid Mechanics

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  • What is a radial-flow turbine?

In a radial-flow turbine, steam flows outward from the shaft to the casing. The unit is usually a reaction unit, having both fixed and moving blades.

  • What are four types of turbine seals?
  • Carbon rings fitted in segments around the shaft and held together by garter or retainer springs.
  • Labyrinth mated with shaft serration’s or shaft seal strips.
  • Water seals where a shaft runner acts as a pump to create a ring of water around the shaft. Use only treated water to avoid shaft pitting.
  • Stuffing box using woven or soft packing rings that are compressed with a gland to prevent leakage along the shaft.
  • What are two types of clearance in a turbine?
    • Radial – clearance at the tips of the rotor and casing.

    • Axial – the fore-and-aft clearance, at the sides of the rotor and the casing.

  • What is the function of a thrust bearing?
  • Thrust bearings keep the rotor in its correct axial position.

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    • What are some conditions that may prevent a turbine from developing full power?
    • The machine is overloaded.

    • The initial steam pressure and temperature are not up to design conditions.

    • The exhaust pressure is too high.

    • The governor is set too low.

    • The steam strainer is clogged.

    • Turbine nozzles are clogged with deposits.

    • Internal wear on nozzles and blades.

  • What is a stage in a steam turbine?
  • In an impulse turbine, the stage is a set of moving blades behind the nozzle. In a reaction turbine, each row of blades is called a "stage." A single Curtis stage may consist of two or more rows of moving blades.

    • What is a diaphragm?

    Partitions between pressure stages in a turbine’s casing are called diaphragms. They hold the vane-shaped nozzles and seals between the stages. Usually labyrinth-type seals are used. One-half of the diaphragm is fitted into the top of the casing, the other half into the bottom.

    • What are the two basic types of steam turbines?
    • Impulse type.

    • Reaction type.

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  • What are topping and superposed turbines?
  • Topping and superposed turbines arc high-pressure, non-condensing units that can be added to an older, moderate-pressure plant. Topping turbines receive high-pressure steam from new high-pressure boilers. The exhaust steam of the new turbine has the same pressure as the old boilers and is used to supply the old turbines.

    • What is a combination thrust and radial bearing?

    This unit has the ends of the Babbitt bearing extended radically over the end of the shell. Collars on the rotor face these thrust pads, and the journal is supported in the bearing between the thrust collars.

    Originally posted 2011-04-23 11:49:42.

    1 thought on “Fluid Mechanics Question And Answers | Fluid Mechanics Internship | Interview Question For Fresher’s | Interview Question For Fluid Mechanics

    1. afrow engineering

      A weighted flywheel.
      A pressure pump propelled by flywheel outside diameter.
      A drive pump propelling flywheel center.
      A accumilator assist.
      Rotating at 10,000 rpms.
      How long would flywheel turn?

      Reply

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