Theory of Machine In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction) P = W tan(α - φ) P = W tan(α + φ) P = W tan(φ - α) P = W cos(α + φ) P = W tan(α - φ) P = W tan(α + φ) P = W tan(φ - α) P = W cos(α + φ) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The locus of a point on a thread unwound from a cylinder will be Involute A circle Cycloidal A straight line Involute A circle Cycloidal A straight line ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the below are inversions of slider crank mechanism?1. Oscillating cylinder engine mechanism2. Toggle mechanism3. Radial cylinder engine mechanism4. Quick return mechanism 1, 2 and 3 2, 3 and 4 1, 3 and 4 1, 2 and 4 1, 2 and 3 2, 3 and 4 1, 3 and 4 1, 2 and 4 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The gear train usually employed in clocks is a Sun and planet gear Reverted gear train Simple gear train Differential gear Sun and planet gear Reverted gear train Simple gear train Differential gear ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a pantograph, all the pairs are Turning pairs Sliding pairs Self-closed pairs Spherical pairs Turning pairs Sliding pairs Self-closed pairs Spherical pairs ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The relation l = (2/3).(j + 2) apply only to kinematic chains in which lower pairs are used. This may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to Two lower pairs and one additional link Two lower pairs and two additional links Any one of these One lower pair and two additional links Two lower pairs and one additional link Two lower pairs and two additional links Any one of these One lower pair and two additional links ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS