Theory of Machine A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is 6,000 r.p.m. 9,360 r.p.m. 5,367 r.p.m. 12,000 r.p.m. 6,000 r.p.m. 9,360 r.p.m. 5,367 r.p.m. 12,000 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be Minimum Zero None of these Maximum Minimum Zero None of these Maximum 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 To start the locomotive quickly Minimize the effect of secondary forces Have perfect balancing Minimize the effect of primary forces To start the locomotive quickly Minimize the effect of secondary forces Have perfect balancing Minimize the effect of primary forces ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The danger of breakage and vibration is maximum None of these Near the critical speed Above the critical speed Below the critical speed None of these Near the critical speed Above the critical speed Below the critical speed ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is Equal to 1 Greater than 2 Equal to 2 Less than 2 Equal to 1 Greater than 2 Equal to 2 Less than 2 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A spring controlled governor is said to be isochronous when the controlling force Increases as the radius of rotation increases Increases as the radius of rotation decreases Decreases as the radius of rotation increases Remain constant for all radii of rotation Increases as the radius of rotation increases Increases as the radius of rotation decreases Decreases as the radius of rotation increases Remain constant for all radii of rotation ANSWER DOWNLOAD EXAMIANS APP
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