Theory of Machine For dynamic balancing of a shaft None of these The net couple due to the dynamic forces acting on the shaft is equal to zero The net dynamic force acting on the shaft is equal to zero Both (A) and (B) None of these The net couple due to the dynamic forces acting on the shaft is equal to zero The net dynamic force acting on the shaft is equal to zero Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the two elements of a pair have __________ when in motion, it is said to a lower pair. None of these Line or point contact Body contact Surface contact None of these Line or point contact Body contact Surface contact ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which one of the following is an exact straight line mechanism using lower pairs? Robert’s mechanism Peaucellier’s mechanism Grasshopper mechanism Watt’s mechanism Robert’s mechanism Peaucellier’s mechanism Grasshopper mechanism Watt’s mechanism ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following is a spring controlled governor? All of these Wilson-Hartnell governor Hartnell governor Hartung governor All of these Wilson-Hartnell governor Hartnell governor Hartung governor ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The rotating shafts tend to vibrate violently at whirling speeds because The system is unbalanced Resonance is caused due to the heavy mass of the rotor Bearing centre line coincides with the axis The shafts are rotating at very high speeds The system is unbalanced Resonance is caused due to the heavy mass of the rotor Bearing centre line coincides with the axis The shafts are rotating at very high speeds ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively) m₁ r₁ = m₂ r₂ None of these m₁ m₂ = r₁ r₂ m₁ r₂ = m₂ r₁ m₁ r₁ = m₂ r₂ None of these m₁ m₂ = r₁ r₂ m₁ r₂ = m₂ r₁ ANSWER DOWNLOAD EXAMIANS APP
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