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  • Question

  • In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.


  • Options
  • A. less than
  • B. equal to
  • C. more than

  • Correct Answer
  • less than 

    • Engineering Mechanics problems

    Search Results

    • 1. The total energy possessed by a system of moving bodies

    • Options
    • A. is constant at every instant
    • B. varies from point to point
    • C. is maximum in the start and minimum at the end
    • D. is minimum in the start and maximum at the end
      • Discuss
    • 2. A couple produces

    • Options
    • A. translatory motion
    • B. rotational motion
    • C. combined translatory and rotational motion
    • D. none of the above
      • Discuss
    • 3. The static friction

    • Options
    • A. bears a constant ratio to the normal reaction between the two surfaces
    • B. is independent of the area of contact, between the two surfaces
    • C. always acts in a direction, opposite to that in which the body tends to move
    • D. all of the above
      • Discuss
    • 4. The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by(where r = Amplitude of motion, and y = Displacement of the particle from mean position.)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. A framed structure, as shown in the below figure, is a

    • Options
    • A. perfect frame
    • B. deficient frame
    • C. redundant frame
    • D. none of the above
      • Discuss
    • 6. When the spring of a watch is wound, it will possess

    • Options
    • A. strain energy
    • B. kinetic energy
    • C. heat energy
    • D. electrical energy
      • Discuss
    • 7. The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed.

    • Options
    • A. more
    • B. less
      • Discuss
    • 8. An irregular body may have more than one centre of gravity.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 9. The maximum height of a projectile on a horizontal plane, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. In a screw jack, the effort required to lift the load is given by(where W = Load lifted, ? = Helix angle, and ? = Angle of friction.)

    • Options
    • A. P = W tan (? - ?)
    • B. P = W tan (? + ?)
    • C. P = W tan (? - ?)
    • D. P = W cos (? + ?)
      • Discuss

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