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 = 45° - φ/2 α = 90° - φ α = 90° + φ α = 45° + φ/2 α = 45° - φ/2 α = 90° - φ α = 90° + φ ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve) m/(m + M) (m + M)/m M/(m + M) (m + M)/M m/(m + M) (m + M)/m M/(m + M) (m + M)/M ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The axis of precession is __________ to the plane in which the axis of spin is going to rotate. Perpendicular Both A and B Parallel None of these Perpendicular Both A and B Parallel None of these ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a gear having involute teeth, the normal to the involute is a tangent to the Base circle Dedendum circle Pitch circle Addendum circle Base circle Dedendum circle Pitch circle Addendum circle ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In S.H.M., acceleration is proportional to All of these Displacement Velocity Rate of change of velocity All of these Displacement Velocity Rate of change of velocity ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The velocity of a body moving with simple harmonic motion is __________ at the mean position. None of these Zero Maximum Minimum None of these Zero Maximum Minimum ANSWER DOWNLOAD EXAMIANS APP
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