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 When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as Compound pendulum Torsional pendulum Second's pendulum Simple pendulum Compound pendulum Torsional pendulum Second's pendulum Simple pendulum ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The driving and driven shafts connected by a Hooke's joint will have equal speeds, if tanθ = ± cosα sinθ = ± tanα cotθ = cosα cosθ = sinα tanθ = ± cosα sinθ = ± tanα cotθ = cosα cosθ = sinα 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 1, 3 and 4 1, 2 and 4 2, 3 and 4 1, 2 and 3 1, 3 and 4 1, 2 and 4 2, 3 and 4 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Creep in belt drive is due to Larger size of the driver pulley Material of the belt Material of the pulley Uneven extensions and contractions due to varying tension Larger size of the driver pulley Material of the belt Material of the pulley Uneven extensions and contractions due to varying tension ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A chain comprises of 5 links having 5 joints. Is it kinematic chain? It is a marginal case Yes No Data are insufficient to determine it It is a marginal case Yes No Data are insufficient to determine it ANSWER DOWNLOAD EXAMIANS APP
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