Engineering Mechanics Online Test – Multiple Choice Questions and Answers 1. If P is the force acting on the body, m is the mass of the body and a is the acceleration of the body, then according to Newton’s second law of motion, P/m.a = 0 P – m.a = 0 P x m.a = 0 P + m.a = 0 2. The term ‘centroid’ is the same as centre of gravity the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis the point of suspension none of the above 3. The maximum mechanical advantage of a lifting machine is 1 – m m 1 + m 1 / m 4. A machine having an efficiency greater than 50%, is known as neither reversible nor non-reversible machine reversible machine ideal machine non-reversible machine 5. The energy possessed by a body, for doing work by virtue of its position, is called kinetic energy electrical energy potential energy chemical energy 6. Which of the following are vector quantities? Angular acceleration Angular velocity Angular displacement all of these 7. The total motion possessed by a body, is called impulsive force weight mass momentum 8. In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is 50 100 150 200 9. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base five times six times seven times nine times 10. The friction experienced by a body, when at rest, is known as coefficient of friction limiting friction static friction dynamic friction Loading … Question 1 of 10
