Engineering Mechanics An ideal machine is one whose efficiency is 1 Between 80 and 90% Between 70 and 80% Between 60 and 70 % 1 Between 80 and 90% Between 70 and 80% Between 60 and 70 % ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The static friction Is independent of the area of contact, between the two surfaces Always acts in a direction, opposite to that in which the body tends to move All of these Bears a constant ratio to the normal reaction between the two surfaces Is independent of the area of contact, between the two surfaces Always acts in a direction, opposite to that in which the body tends to move All of these Bears a constant ratio to the normal reaction between the two surfaces ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics If rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella More inclined when moving More inclined when standing Less inclined when standing Less inclined when moving More inclined when moving More inclined when standing Less inclined when standing Less inclined when moving ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be Towards the wall at its upper end Downwards at its upper end Upwards at its upper end Away from the wall at its upper end Towards the wall at its upper end Downwards at its upper end Upwards at its upper end Away from the wall at its upper end ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The mechanical advantage of a lifting machine is the ratio of Distance moved by effort to the distance moved by load Output to the input Load lifted to the effort applied All of these Distance moved by effort to the distance moved by load Output to the input Load lifted to the effort applied All of these ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The unit of angular velocity is m/min Revolutions/min Both (B) and (C) rad/s m/min Revolutions/min Both (B) and (C) rad/s ANSWER DOWNLOAD EXAMIANS APP
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