Engineering Mechanics An ideal machine is one whose efficiency is Between 60 and 70 % Between 80 and 90% Between 70 and 80% 1 Between 60 and 70 % Between 80 and 90% Between 70 and 80% 1 ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics A pendulum which executes one beat per second is known as Compound pendulum Second's pendulum Simple pendulum Torsional pendulum Compound pendulum Second's pendulum Simple pendulum Torsional pendulum ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics If a number of forces are acting at a point, their resultant is given by (∑V)2 +(∑H)2 +2(∑V)(∑H) √[(∑V)2 +(∑H)2 +2(∑V)(∑H)] (∑V)2 + (∑H)2 √[(∑V)2 + (∑H)2] (∑V)2 +(∑H)2 +2(∑V)(∑H) √[(∑V)2 +(∑H)2 +2(∑V)(∑H)] (∑V)2 + (∑H)2 √[(∑V)2 + (∑H)2] ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is a = α/ r a = α.r a = r / α None of these a = α/ r a = α.r a = r / α None of these ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is 20 40 10 5 20 40 10 5 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 Area of the triangle Half the area of the triangle Twice the area of the triangle None of these Area of the triangle Half the area of the triangle Twice the area of the triangle ANSWER DOWNLOAD EXAMIANS APP
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