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. 12,000 r.p.m. 5,367 r.p.m. 9,360 r.p.m. 6,000 r.p.m. 12,000 r.p.m. 5,367 r.p.m. 9,360 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when a is +ve and b is -ve a = 0 and b is +ve a is +ve and b is also +ve a is +ve and b = 0 a is +ve and b is -ve a = 0 and b is +ve a is +ve and b is also +ve a is +ve and b = 0 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A cam mechanism imparts following motion All of these Oscillating Rotating Reciprocating All of these Oscillating Rotating Reciprocating ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m).(dx/dt) + (s/m).x = 0, if the roots of the equation are __________ then the system will be under damped. Real Complex conjugate None of these Equal Real Complex conjugate None of these Equal ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A disc is a spinning with an angular velocity ω rad/s about the axis of spin. The couple applied to the disc causing precession will be (where I = Mass moment of inertia of the disc, and ωP = Angular velocity of precession of the axis of spin) (1/2).Iω² Iω² (1/2). I ω ωP I ω ωP (1/2).Iω² Iω² (1/2). I ω ωP I ω ωP ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The Whitworth quick return motion mechanism is formed in a slider crank chain when the Coupler link is fixed Longest link is a fixed link Slider is a fixed link Smallest link is a fixed link Coupler link is fixed Longest link is a fixed link Slider is a fixed link Smallest link is a fixed link ANSWER DOWNLOAD EXAMIANS APP
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