Engineering Mechanics An ideal machine is one whose efficiency is Between 70 and 80% 1 Between 60 and 70 % Between 80 and 90% Between 70 and 80% 1 Between 60 and 70 % Between 80 and 90% ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics One joule is equal to 0.1 N-m 10 N-m 100 N-m 1 N-m 0.1 N-m 10 N-m 100 N-m 1 N-m ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics A force while acting on a body may Change its motion Give rise to the internal stresses in it All of these Balance the forces, already acting on it Change its motion Give rise to the internal stresses in it All of these Balance the forces, already acting on it ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to None of these Half the area of the triangle Twice the area of the triangle Area of the triangle None of these Half the area of the triangle Twice the area of the triangle Area of the triangle ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The static friction All of these Is independent of the area of contact, between the two surfaces Bears a constant ratio to the normal reaction between the two surfaces Always acts in a direction, opposite to that in which the body tends to move All of these Is independent of the area of contact, between the two surfaces Bears a constant ratio to the normal reaction between the two surfaces Always acts in a direction, opposite to that in which the body tends to move ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is g/4 g/3 g/2 None of these g/4 g/3 g/2 None of these ANSWER DOWNLOAD EXAMIANS APP
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