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Home Mechanical Engineering Steam Nozzles and Turbines See What Others Are Saying!
  • Question
  • A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be


  • Options
  • A. 79 m/s
  • B. 188 m/s
  • C. 450 m/s
  • D. 900 m/s

  • Correct Answer
  • 450 m/s 


  • More questions

    • 1. The conditioned air supplied to the room must have the capacity to take up

    • Options
    • A. room sensible heat load only
    • B. room latent heat load only
    • C. both room sensible heat and latent heat loads
    • D. none of the above
    • Discuss
    • 2. The alignment circle is marked on the psychrometric chart at

    • Options
    • A. 20°C DBT and 50% RH
    • B. 26°C DBT and 50% RH
    • C. 20°C DBT and 60% RH
    • D. 26°C DBT and 60% RH
    • Discuss
    • 3. The thermal diffusivity for gases is generally __________ those for liquids.

    • Options
    • A. equal to
    • B. less than
    • C. greater than
    • Discuss
    • 4. A stripper-plate machine is used to draw the pattern from the mould.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 5. Steam turbines are used for

    • Options
    • A. large marine propulsion
    • B. electric power generation
    • C. direct drive of fans, compressors, pumps
    • D. all of these
    • Discuss
    • 6. Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A'

    • Options
    • A. one-eighth
    • B. one-fourth
    • C. one-half
    • D. four times
    • Discuss
    • 7. The shear force at apoint on a beam is the algebraic __________ of all the forces on either side of the point.

    • Options
    • A. sum
    • B. difference
    • Discuss
    • 8. Shear modulus is the ratio of

    • Options
    • A. linear stress to linear strain
    • B. linear stress to lateral strain
    • C. volumetric strain to linear strain
    • D. shear stress to shear strain
    • Discuss
    • 9. The presence of hydrogen in steel causes

    • Options
    • A. reduced neutron absorption cross-section
    • B. improved weldability
    • C. embrittlement
    • D. corrosion resistance
    • Discuss
    • 10. The brake pedal during ABS operation

    • Options
    • A. is pushed upward forcefully
    • B. pedal stroke becomes longer
    • C. transmits slight kickback to the driver's foot
    • D. all of the above
    • Discuss


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