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 Which of the following mechanism is obtained from lower pair? All of these Gyroscope Pantograph Valve and valve gears All of these Gyroscope Pantograph Valve and valve gears ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The relation between number of links (l) and number of joints (j) in a kinematic chain is l = (1/2).(j + 2) l = (2/3).(j + 2) l = j + 4 l = (3/4).(j + 3) l = (1/2).(j + 2) l = (2/3).(j + 2) l = j + 4 l = (3/4).(j + 3) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as Swaying couple None of these Hammer blow Tractive force Swaying couple None of these Hammer blow Tractive force 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) tanφ + cotα = b/c sinφ + sinα = b/c cotφ - cotα = c/b cosφ - sinα = c/b tanφ + cotα = b/c sinφ + sinα = b/c cotφ - cotα = c/b cosφ - sinα = c/b ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a Kinematic chain Mechanism Structure Inversion Kinematic chain Mechanism Structure Inversion ANSWER DOWNLOAD EXAMIANS APP
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