Applied Mechanics Online Test – Multiple Choice Questions and Answers 1. Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature dip of the cable decreases length of the cable increases dip of the cable increases none of the these 2. Power can be expressed as work/time work/energy work x time work/distance 3. The shape of a suspended cable under its own weight, is circular elliptical parabolic catenary 4. The angle of friction is : The force of friction at which the body is just about to move The ratio of the friction and the normal reaction The angle between the normal reaction and the resultant of normal raction and limiting friction The force of friction when the body is in motion 5. The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is mass interia weight momentum 6. A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately 400 watts 4000 watts 500 watts none of these 7. If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along the same line in the same sense the same line in opposite sense the perpendicular to both the lines none of these 8. A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be 48 kg 60 kg 72 kg none of these 9. The following is not a law of static friction : The force of friction depends upon the roughness of the surface The force of friction is dependent upon the area of contact The force of friction always acts in a direction opposite to that in which the body tends to move The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces 10. If the angle between the applied force and the direction of motion of a body, is between 90° and 180°, the work done, is called imaginary work virtual work negative work zero work Loading … Question 1 of 10
