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  • Question
  • When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where ? = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)


  • Options
  • A. When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end,
  • B. When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end,
  • C. When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end,
  • D. When a circular bar tapering uniformly from diameter d1, at one end to diameter d2 at the other end,

  • Correct Answer
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  • More questions

    • 1. The velocity of a body on reaching the ground from a height h, is

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    • A.
    • B.
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    • 2. A drill mainly used in drilling brass, copper or softer materials, is

    • Options
    • A. flat drill
    • B. straight fluted drill
    • C. parallel shank twist drill
    • D. tapered shank twist drill
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    • 3. In the below figure, stress is proportional to strain, for the portion

    • Options
    • A. from O to A
    • B. from A to C
    • C. from A to D
    • D. from D to E
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    • 4. A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

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    • 5. The critical pressure ratio for initially wet steam is

    • Options
    • A. 0.546
    • B. 0.577
    • C. 0.582
    • D. 0.601
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    • 6. An open structure of a grinding wheel is used for

    • Options
    • A. soft materials
    • B. tough materials
    • C. ductile materials
    • D. all of these
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    • 7. Delta-iron occurs between the temperature range of

    • Options
    • A. 400°C to 600°C
    • B. 600°C to 900°C
    • C. 900°C to 1400°C
    • D. 1400°C to 1530°C
    • Discuss
    • 8. The D-Alembert's principle is used for changing the dynamic equilibrium of a fluid mass, into a static equilibrium.

    • Options
    • A. Agree
    • B. Disagree
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    • 9. Cold working distorts grain structure and does not provide an appreciable reduction in size.

    • Options
    • A. Correct
    • B. Incorrect
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    • 10. The mass of flue gas per kg of fuel is the ratio of the

    • Options
    • A. mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel
    • B. mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas
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    • D. mass of carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas
    • Discuss


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