Theory of Machine The number of links and instantaneous centers in a reciprocating engine mechanism are 4, 4 4, 6 4, 5 5, 4 4, 4 4, 6 4, 5 5, 4 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 (sin 2θ/n) m.ω².r cosθ m.ω².r sinθ m.ω².r (cos 2θ/n) m.ω².r (sin 2θ/n) m.ω².r cosθ m.ω².r sinθ m.ω².r (cos 2θ/n) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to x₁/x₂ loge(x₁/x₂) log(x₁.x₂) log(x₁/x₂) x₁/x₂ loge(x₁/x₂) log(x₁.x₂) log(x₁/x₂) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the Unbalanced forces are not dangerous at higher speeds Unbalanced couples are caused only at higher speeds Effects of unbalances are directly proportional to the speed Effects of unbalances are proportional to the square of the speed Unbalanced forces are not dangerous at higher speeds Unbalanced couples are caused only at higher speeds Effects of unbalances are directly proportional to the speed Effects of unbalances are proportional to the square of the speed ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The example of successfully constrained motion is a Motion of an I.C. engine valve All of these Motion of the shaft between a footstep bearing Piston reciprocating inside an engine cylinder Motion of an I.C. engine valve All of these Motion of the shaft between a footstep bearing Piston reciprocating inside an engine cylinder ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following is a spring controlled governor? All of these Hartung governor Wilson-Hartnell governor Hartnell governor All of these Hartung governor Wilson-Hartnell governor Hartnell governor ANSWER DOWNLOAD EXAMIANS APP
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