Theory of Machine In an open pair, the two elements of a pair Have a surface contact when in motion Are not held together mechanically Are kept in contact by the action of external forces, when in motion Have a line or point contact when in motion Have a surface contact when in motion Are not held together mechanically Are kept in contact by the action of external forces, when in motion Have a line or point contact when in motion ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Cam size depends upon Outer circle Base circle Prime circle Pitch circle Outer circle Base circle Prime circle Pitch circle ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Efficiency of a screw jack is given by tan (α - φ)/tanα tan (α + φ)/tanα tanα/tan (α +φ) tanα/tan (α - φ) tan (α - φ)/tanα tan (α + φ)/tanα tanα/tan (α +φ) tanα/tan (α - φ) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a simple harmonic motion, the velocity vector with respect to displacement vector Lags by 90° Leads by 180° Leads by 90° Is in phase Lags by 90° Leads by 180° Leads by 90° Is in phase ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base) cosφ - sinα = c/b tanφ + cotα = b/c cotφ - cotα = c/b sinφ + sinα = b/c cosφ - sinα = c/b tanφ + cotα = b/c cotφ - cotα = c/b sinφ + sinα = b/c ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A system of masses rotating in different parallel planes is in dynamic balance if the Resultant force and resultant couple are both equal to zero Resultant couple is equal to zero Resultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero Resultant force is equal to zero Resultant force and resultant couple are both equal to zero Resultant couple is equal to zero Resultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero Resultant force is equal to zero ANSWER DOWNLOAD EXAMIANS APP
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