logo

CuriousTab

CuriousTab

Discussion

Home ‣ Mechanical Engineering ‣ Engineering Mechanics Comments
  • Question

  • A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is


  • Options
  • A. reversible
  • B. non-reversible
  • C. ideal

  • Correct Answer
  • reversible 

    • Engineering Mechanics problems

    Search Results

    • 1. A newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m / s2 in the direction of which it acts.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 2. The total momentum of a system of masses (i. e. moving bodies) in any one direction remains constant, unless acted upon by an external force in that direction. This statement is called

    • Options
    • A. Newton's first law of motion
    • B. Newton's second law of motion
    • C. principle of conservation of energy
    • D. principle of conservation of momentum
      • Discuss
    • 3. The resultant of two forces P and Q acting at an angle ? is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. The maximum efficiency of a screw jack is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. A lift moves downwards with an acceleration of 9.8 m/s2. The pressure exerted by a man on the floor of the lift is zero.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. Non-coplaner concurrent forces are those forces which

    • Options
    • A. meet at one point, but their lines of action do not lie on the same plane
    • B. do not meet at one point and their lines of action do not lie on the same plane
    • C. meet at one point and their lines of action also lie on the same plane
    • D. do not meet at one point, but their lines of action lie on the same plane
      • Discuss
    • 7. The overturning of a vehicle on a level circular path can be avoided if the velocity of vehicle is __________ .

    • Options
    • A. less than
    • B. greater than
      • Discuss
    • 8. The force which acts along the radius of a circle and directed towards the centre of the circle is known as centripetal force.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

    • Options
    • A. 5
    • B. 10
    • C. 20
    • D. 40
      • Discuss
    • 10. The centre of gravity of a trapezium with parallel sides a and b lies at a distance of y from the base b, as shown in the below figure. The value of y is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.