Theory of Machine A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become 8 fn 2 fn fn/2 4 fn 8 fn 2 fn fn/2 4 fn ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A cam with a roller follower would constitute following type of pair Open pair Lower pair Close pair Higher pair Open pair Lower pair Close pair Higher pair ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle) [(r² + R²) cosφ]/2 [(r² + R²) sinφ]/2 [(r + R) cosφ]/2 [(r + R) sinφ]/2 [(r² + R²) cosφ]/2 [(r² + R²) sinφ]/2 [(r + R) cosφ]/2 [(r + R) sinφ]/2 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become tp /16 4 tp 16 tp tp /4 tp /16 4 tp 16 tp tp /4 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to Have perfect balancing To start the locomotive quickly Minimize the effect of secondary forces Minimize the effect of primary forces Have perfect balancing To start the locomotive quickly Minimize the effect of secondary forces Minimize the effect of primary forces ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration. Larger Smaller None of the listed here Smaller OR Larger Larger Smaller None of the listed here Smaller OR Larger ANSWER DOWNLOAD EXAMIANS APP
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