Theory of Machine Which of the following governor is used to drive a gramophone? Hartnell governor Pickering governor Watt governor Porter governor Hartnell governor Pickering governor Watt governor Porter governor ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In under damped vibrating system, the amplitude of vibration Decreases exponentially with time Decreases linearly with time Increases exponentially with time Increases linearly with time Decreases exponentially with time Decreases linearly with time Increases exponentially with time Increases linearly with time ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The secondary 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 sinθ m.ω².r (sin 2θ/n) m.ω².r cosθ m.ω².r (cos 2θ/n) m.ω².r sinθ m.ω².r (sin 2θ/n) m.ω².r cosθ m.ω².r (cos 2θ/n) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following statements regarding laws governing the friction between dry surfaces are correct? The friction force is independent of me area of contact. All of these The friction force is dependent on the materials of the contact surfaces. The friction force is directly proportional to the normal force. The friction force is independent of me area of contact. All of these The friction force is dependent on the materials of the contact surfaces. The friction force is directly proportional to the normal force. ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The unbalanced force due to revolving masses Constant in magnitude and direction both Varies in magnitude but constant in direction Varies in magnitude and direction both Varies in direction but constant in magnitude Constant in magnitude and direction both Varies in magnitude but constant in direction Varies in magnitude and direction both Varies in direction but constant in magnitude ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system) Greater than unity Less than unity Zero Equal to unity Greater than unity Less than unity Zero Equal to unity ANSWER DOWNLOAD EXAMIANS APP
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