Theory of Machine The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft) 2π qI 2π. √(q/I) 1/2π (1/2π). √(q/I) 2π qI 2π. √(q/I) 1/2π (1/2π). √(q/I) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Frequency of vibrations is usually expressed in Number of cycles per minute Number of cycles per hour Number of cycles per second None of these Number of cycles per minute Number of cycles per hour Number of cycles per second None of these ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be More sensitive Isochronous Less sensitive Unaffected of sensitivity More sensitive Isochronous Less sensitive Unaffected of sensitivity ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The inversion of a mechanism is Turning its upside down Changing of a higher pair to a lower pair Obtained by reversing the input and output motion Obtained by fixing different links in a kinematic chain Turning its upside down Changing of a higher pair to a lower pair Obtained by reversing the input and output motion Obtained by fixing different links in a kinematic chain ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank) m.ω².r (cos 2θ/n) m.ω².r sinθ m.ω².r cosθ m.ω².r (sin 2θ/n) m.ω².r (cos 2θ/n) m.ω².r sinθ m.ω².r cosθ m.ω².r (sin 2θ/n) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as Sliding pair Turning pair Rolling pair Spherical pair Sliding pair Turning pair Rolling pair Spherical pair ANSWER DOWNLOAD EXAMIANS APP
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