Theory of Machine The rotating shafts tend to vibrate violently at whirling speeds because The system is unbalanced Bearing centre line coincides with the axis The shafts are rotating at very high speeds Resonance is caused due to the heavy mass of the rotor The system is unbalanced Bearing centre line coincides with the axis The shafts are rotating at very high speeds Resonance is caused due to the heavy mass of the rotor ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which one of the following is an exact straight line mechanism using lower pairs? Watt’s mechanism Robert’s mechanism Grasshopper mechanism Peaucellier’s mechanism Watt’s mechanism Robert’s mechanism Grasshopper mechanism Peaucellier’s mechanism ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a Turning pair Spherical pair Sliding pair Screw pair Turning pair Spherical pair Sliding pair Screw pair ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r₁ and r₂ = External and internal radii of collar respectively) (2/3). μ W (r₁ + r₂) (2/3). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (1/2). μ W (r₁ + r₂) (1/2). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (2/3). μ W (r₁ + r₂) (2/3). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (1/2). μ W (r₁ + r₂) (1/2). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a spring controlled governor, when the controlling force ____ as the radius of rotation increases, it is said to be a stable governor. None of the listed here Decreases Increases Remains constant None of the listed here Decreases Increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine According to Kennedy's theorem, if three bodies move relatively to each other, their instantaneous centers will lie on a Straight line Rectangle Parabolic curve Triangle Straight line Rectangle Parabolic curve Triangle ANSWER DOWNLOAD EXAMIANS APP
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