Theory of Machine Which one of the following is an exact straight line mechanism using lower pairs? Peaucellier’s mechanism Robert’s mechanism Watt’s mechanism Grasshopper mechanism Peaucellier’s mechanism Robert’s mechanism Watt’s mechanism Grasshopper mechanism ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body) P = W (cos α + μ sin α) P = W tan (α + φ) P = W tan α P = W (sin α + μ cos α) P = W (cos α + μ sin α) P = W tan (α + φ) P = W tan α P = W (sin α + μ cos α) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Cam size depends upon Base circle Prime circle Pitch circle Outer circle Base circle Prime circle Pitch circle Outer circle ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations. None of these More than Same as Less than None of these More than Same as Less than ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will Remain same as before Become equal to 2R Become equal to R/4 Become equal to R/2 Remain same as before Become equal to 2R Become equal to R/4 Become equal to R/2 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following statements regarding laws governing the friction between dry surfaces are correct? All of these The friction force is directly proportional to the normal force. The friction force is independent of me area of contact. The friction force is dependent on the materials of the contact surfaces. All of these The friction force is directly proportional to the normal force. The friction force is independent of me area of contact. The friction force is dependent on the materials of the contact surfaces. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS