Engineering Mechanics - Mechanical Engineering online quiz - Set 01 - ObjectiveBooks

# Quiz Questions

01. A machine which is not capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine.

02. In a wormed geared pulley block, if the number of teeth on the worm wheel is doubled, then its velocity ratio is also doubled.

03. The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.

04. A Newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m/sec. square in the direction of which it acts.

05. According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction.

06. The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.

07. The centre of gravity of a right angled triangle lies at its geometrical centre.

08. If three forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, the forces shall be in equilibrium.

09. A science teacher claimed that Newton's third law of motion is involved while studying the motion of rockets. His statement is

10. A lifting machine lifts a load of 1000N through a distance of 0.2 m by means of an effort of 200N through a distance of 1m. This machine is an ideal one.

11. All the steel trusses of the bridges have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable.

12. The forces, which do not meet at one point, but their lines of action lie on the same plane, are known as coplanar non-concurrent forces.

13. 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.

14. If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.

15. The distance, between the point of projection and the point where the projectile strikes the ground, is known as range.

16. The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.

17. If three forces acting at a point are represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are in equilibrium.

18. If three coplanar forces acting on a point are in equilibrium, then each force is proportional to the sine, of the angle between the other two.

19. In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.

20. When a particle moves along a circular path with uniform velocity, there will be no tangential acceleration.

Blogger Comment