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Mechanical Engineering Engineering MCQS -Mechanics Section-1

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1. The friction experienced by a body, when in motion, is known as




2. 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




3. The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is




4. A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)




5. If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is




6. A smooth cylinder lying on its convex surface remains in __________ equilibrium.




7. Moment of inertia of a circular section about an axis perpendicular to the section is




8. The unit of angular acceleration is




9. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is




10. Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)




11. The range of a projectile is maximum, when the angle of projection is




12. The mechanical advantage of a lifting machine is the ratio of




13. Static friction is always __________ dynamic friction.




14. A body will begin to move down an inclined plane if the angle of inclination of the plane is __________ the angle of friction.




15. The bodies which rebound after impact are called




16. The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as




17. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as




18. The angle between two forces when the resultant is maximum and minimum respectively are




19. A redundant frame is also called __________ frame.




20. When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as




21. During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.




22. Work done is said to be zero, when




23. One watt is equal to




24. two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are




25. If two bodies having masses m1 and m2 (m1>m2) have equal kinetic energies, the momentum of body having mass m1 is __________ the momentum of body having mass m2.