Theory of Machine The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction) α = 90° - φ α = 90° + φ α = 45° - φ/2 α = 45° + φ/2 α = 90° - φ α = 90° + φ α = 45° - φ/2 α = 45° + φ/2 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Klein's construction is useful to determine Velocity of various parts Acceleration of various parts Angular acceleration of various parts Displacement of various parts Velocity of various parts Acceleration of various parts Angular acceleration of various parts Displacement of various parts ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r₁ and r₂ = External and internal radii of collar respectively) (1/2). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (2/3). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (2/3). μ W (r₁ + r₂) (1/2). μ W (r₁ + r₂) (1/2). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (2/3). μ W [(r₁³ - r₂³)/(r₁² - r₂²)] (2/3). μ W (r₁ + r₂) (1/2). μ W (r₁ + r₂) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A completely constrained motion can be transmitted with. 3 links with pin joints 2 links with pin joints 4 links with pin joints 1 link with pin joints 3 links with pin joints 2 links with pin joints 4 links with pin joints 1 link with pin joints ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine An exact straight line motion mechanism is a Peaucellier's mechanism Hart's mechanism Scott-Russell's mechanism All of these Peaucellier's mechanism Hart's mechanism Scott-Russell's mechanism All of these ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be Maximum Minimum None of these Zero Maximum Minimum None of these Zero ANSWER DOWNLOAD EXAMIANS APP
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