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  • Question

  • If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and v2 are their velocities after impact, then coefficient of restitution is given by


  • Options
  • A. If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and
  • B. If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and
  • C. If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and
  • D. If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and

  • Correct Answer
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    • More questions

    • 1. The function of an oil control orifice is that it

    • Options
    • A. returns cylinder head lubricating oil to the oil pan at high speed
    • B. turns oil into fine mist for spray lubrication
    • C. regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
    • D. removes impurities from cylinder head lubricating oil
      • Discuss
    • 2. The missing quantity per stroke is equal to

    • Options
    • A. cylinder feed - indicated mass of steam
    • B. cylinder feed + indicated mass of steam
    • C. mass of cushion steam + indicated mass of steam
    • D. mass of cushion steam + cylinder feed
      • Discuss
    • 3. Quenching is not necessary when hardening is done by

    • Options
    • A. case hardening
    • B. flame hardening
    • C. nitriding
    • D. any one of these
      • Discuss
    • 4. The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 5. Nodular cast iron is produced by adding __________ to the molten cast iron.

    • Options
    • A. nickel
    • B. chromium
    • C. copper
    • D. magnesium
      • Discuss
    • 6. Which of the following statement is correct as regard to centrifugal compressors?

    • Options
    • A. The flow of air is parallel to the axis of the compressor.
    • B. The static pressure of air in the impeller increases in order to provide centripetal force on the air.
    • C. The impeller rotates at high speeds.
    • D. The maximum efficiency is higher than multi-stage axial flow compressors.
      • Discuss
    • 7. Parallel fillet welds are designed for bending strength.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 8. When the dimension is expressed as , then the basic size is

    • Options
    • A. 20 mm
    • B. 20.035 mm
    • C. 20.025 mm
    • D. 19.975 mm
      • Discuss
    • 9. The temperature required for full annealing in hyper-eutectoid steel is

    • Options
    • A. 30° C to 50° C above upper critical temperature
    • B. 30° C to 50° C below upper critical temperature
    • C. 30° C to 50° C above lower critical temperature
    • D. 30° C to 50° C below lower critical temperature
      • Discuss
    • 10. The wet bulb depression is zero when relative humidity is

    • Options
    • A. zero
    • B. 0.5
    • C. 0.75
    • D. 1.0
      • Discuss

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