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Home Mechanical Engineering Strength of Materials See What Others Are Saying!
  • Question
  • Two shafts 'A' and 'B' are made of same material. The shaft 'A' is solid and has diameter D. The shaft 'B' is hollow with outer diameter D and inner diameter D/2. The strength of hollow shaft in torsion is __________ as that of solid shaft.


  • Options
  • A. 1/16
  • B. 1/8
  • C. 1/4
  • D. 15/16

  • Correct Answer
  • 15/16 


  • More questions

    • 1. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero

    • Options
    • A. Agree
    • B. Disagree
    • Discuss
    • 2. Halsey plan of wage incentive

    • Options
    • A. is not applied to all level of workers
    • B. is applied to all level of workers
    • C. does not guarantee minimum wage
    • D. is based upon efficiency of worker
    • Discuss
    • 3. A furnace is made of a red brick wall of thickness 0.5 m and conductivity 0.7 W/mK. For the same heat loss and temperature drop, this can be replaced by a layer of diatomite earth of conductivity 0.14 W/mK and thickness

    • Options
    • A. 0.5 m
    • B. 0.1 m
    • C. 0.2 m
    • D. 0.5 m
    • Discuss
    • 4. The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is

    • Options
    • A. slow speed with radial flow at outlet
    • B. medium speed with radial flow at outlet
    • C. high speed with radial flow at outlet
    • D. high speed with axial flow at outlet
    • Discuss
    • 5. A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly

    • Options
    • A. 1.05
    • B. 2.86
    • C. 6.65
    • D. 10.05
    • Discuss
    • 6. Nuclear reactors are used

    • Options
    • A. to produce heat for thermoelectric power
    • B. to produce fissionable material
    • C. to propel ships, submarines, aircrafts
    • D. all of these
    • Discuss
    • 7. In a closed cycle gas turbine, the air is compressed

    • Options
    • A. isothermally
    • B. polytropically
    • C. isentropically
    • D. none of these
    • Discuss
    • 8. The cylindrical shell of a Lancashire boiler has diameter from

    • Options
    • A. 1 to 2 m
    • B. 1.25 to 2.25 m
    • C. 1.5 to 2.5 m
    • D. 1.75 to 2.75 m
    • Discuss
    • 9. Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as

    • Options
    • A. Zeroth law of thermodynamics
    • B. First law of thermodynamics
    • C. Second law of thermodynamics
    • D. Kinetic theory of gases
    • Discuss
    • 10. In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the atmospheric pressure.

    • Options
    • A. equal to
    • B. lower than
    • C. higher than
    • Discuss


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