Theory of Machine The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r₁ and r₂ = External and internal radii of collar respectively) (1/2) μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (1/2) μ W (r₁ + r₂) (2/3) μ W (r₁ + r₂) (2/3) μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (1/2) μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (1/2) μ W (r₁ + r₂) (2/3) μ W (r₁ + r₂) (2/3) μ W [(r₁³ - r₂³)/(r₁² - r₂²)] ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction) α = 45° - φ/2 α = 90° + φ α = 45° + φ/2 α = 90° - φ α = 45° - φ/2 α = 90° + φ α = 45° + φ/2 α = 90° - φ ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO, if N coincides with O, then Acceleration of the piston P is maximum and its velocity is zero Acceleration and velocity of the piston P is maximum Acceleration of the piston P is zero and its velocity is maximum Acceleration and velocity of the piston P is zero Acceleration of the piston P is maximum and its velocity is zero Acceleration and velocity of the piston P is maximum Acceleration of the piston P is zero and its velocity is maximum Acceleration and velocity of the piston P is zero ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at The point on the circumference situated vertically opposite to the contact point The center of the disc An infinite distance on the plane surface The point of contact The point on the circumference situated vertically opposite to the contact point The center of the disc An infinite distance on the plane surface The point of contact ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Higher pairs are those which have Elements of pairs not held together mechanically Surface contact between the two elements when in motion Point or line contact between the two elements when in motion Two elements that permit relative motion Elements of pairs not held together mechanically Surface contact between the two elements when in motion Point or line contact between the two elements when in motion Two elements that permit relative motion ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The frequency of oscillation at compared to earth will be 2.44 times more 6 times more 6 times less 2.44 times less 2.44 times more 6 times more 6 times less 2.44 times less ANSWER DOWNLOAD EXAMIANS APP
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