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  • Question

  • An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and


  • Options
  • A. chromium
  • B. silicon
  • C. manganese
  • D. magnesium

  • Correct Answer
  • manganese 

    • More questions

    • 1. The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

    • Options
    • A. dedendum
    • B. addendum
    • C. clearance
    • D. working depth
      • Discuss
    • 2. In the austempering process of heat treatment, austenite changes into

    • Options
    • A. martensite
    • B. troostite
    • C. sorbite
    • D. bainite
      • Discuss
    • 3. The best fuels for compression ignition engines are

    • Options
    • A. straight chain paraffins
    • B. aromatics
    • C. branched chain paraffins
    • D. napthalenes
      • Discuss
    • 4. The vector sum of cutting velocity and chip velocity is __________ shear velocity.

    • Options
    • A. equal to
    • B. less than
    • C. more than
      • Discuss
    • 5. In a leaf spring, the deflection at the centre is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. The fittings mounted on the boiler for its proper and safe functioning is a

    • Options
    • A. water level indicatior
    • B. pressure gauge
    • C. safety valve
    • D. all of these
      • Discuss
    • 7. The longitudinal stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 9. Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity

    • Options
    • A. v
    • B. v/2
    • C. v/4
    • D. v/8
      • Discuss
    • 10. The reduced ambient air cooling system has

    • Options
    • A. one cooling turbine and one heat exchanger
    • B. one cooling turbine and two heat exchangers
    • C. two cooling turbines and one heat exchanger
    • D. two cooling turbines and two heat exchangers
      • Discuss

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