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Home ‣ Mechanical Engineering ‣ IC Engines and Nuclear Power Plants See What Others Are Saying!
  • Question

  • Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has


  • Options
  • A. high neutron absorption cross-section
  • B. low moderating efficiency
  • C. high neutron scatter cross-section
  • D. low neutron absorption cross-section

  • Correct Answer
  • low moderating efficiency 

    • More questions

    • 1. Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of

    • Options
    • A. plates
    • B. pallets
    • C. pins
    • D. all of these
      • Discuss
    • 2. In order to give the primary balance of the reciprocating parts of a multi-cylinder in-line engines,

    • Options
    • A. the algebraic sum of the primary forces must be equal to zero
    • B. the algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
    • C. both (a) and (b)
    • D. none of these
      • Discuss
    • 3. The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 4. The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (?) rad/s about its vertical axis, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. The petrol engines are also known as

    • Options
    • A. spark ignition (S.I.) engines
    • B. compression ignition (C.I.) engines
    • C. steam engines
    • D. none of these
      • Discuss
    • 6. Which of the following pump is generally used to pump highly viscous fluid?

    • Options
    • A. Centrifugal pump
    • B. Reciprocating pump
    • C. Air lift pump
    • D. Screw pump
      • Discuss
    • 7. The machining allowance provided on patterns depends upon

    • Options
    • A. type of casting metal
    • B. size and shape of casting
    • C. method of casting used
    • D. all of these
      • Discuss
    • 8. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

    • Options
    • A. 1.33
    • B. 2.33
    • C. 3.33
    • D. 4.33
      • Discuss
    • 9. The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where ? = Efficiency of the riveted joint)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. Muntz metal (Yellow brass) contains

    • Options
    • A. 70% copper and 30% zinc
    • B. 60% copper and 40% zinc
    • C. 59% copper, 40% zinc and 1% tin
    • D. 60.45% copper, 35.2% zinc and 5.35% nickel
      • Discuss

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