Theory of Machine In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to 0.8 0.2 0.4 0.6 0.8 0.2 0.4 0.6 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Coriolis component is encountered in Both (A) and (C) above Four bar chain mechanism Quick return mechanism of shaper Slider crank mechanism Both (A) and (C) above Four bar chain mechanism Quick return mechanism of shaper Slider crank mechanism 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 Instantaneous center of rotation of a link in a four bar mechanism lies on Can’t occur A point obtained by intersection on extending adjoining links Right side pivot of this link Left side pivot of this link Can’t occur A point obtained by intersection on extending adjoining links Right side pivot of this link Left side pivot of this link ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the 0.5 1 2 1.5 0.5 1 2 1.5 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be 650°K 700°K 600°K 625°K 650°K 700°K 600°K 625°K ANSWER DOWNLOAD EXAMIANS APP
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