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 Pitch point on a cam is Any point on pitch circle The point on cam pitch curve having the minimum pressure angle The point on cam pitch curve having the maximum pressure angle Any point on pitch curve Any point on pitch circle The point on cam pitch curve having the minimum pressure angle The point on cam pitch curve having the maximum pressure angle Any point on pitch curve ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The brake commonly used in railway trains is Shoe brake Internal expanding brake Band and block brake Band brake Shoe brake Internal expanding brake Band and block brake Band brake ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O) (ω₁ - ω₂)r (ω₁ - ω₂)2r (ω₁ + ω₂)r ω₁.ω₂.r (ω₁ - ω₂)r (ω₁ - ω₂)2r (ω₁ + ω₂)r ω₁.ω₂.r ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a Lower pair Force-closed pair Higher pair Self-closed pair Lower pair Force-closed pair Higher pair Self-closed pair ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following disciplines provides study of relative motion between the parts of a machine? Applied mechanics Mechanisms Kinematics Theory of machines Applied mechanics Mechanisms Kinematics Theory of machines ANSWER DOWNLOAD EXAMIANS APP
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