Theory of Machine Open pairs are those which have Point or line contact between the two elements when in motion Surface contact between the two elements when in motion Elements of pairs not held together mechanically Two elements that permit relative motion Point or line contact between the two elements when in motion Surface contact between the two elements when in motion Elements of pairs not held together mechanically Two elements that permit relative motion ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The motion between a pair when limited to a definite direction, irrespective of the direction of force applied, is known as Incompletely constrained motion Completely constrained motion None of these Successfully constrained motion Incompletely constrained motion Completely constrained motion None of these Successfully constrained motion ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because Both (A) and (B) The Ackerman steering gear consists of turning pairs Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels The Ackerman steering gear is most economical Both (A) and (B) The Ackerman steering gear consists of turning pairs Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels The Ackerman steering gear is most economical ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r₁ = Minimum radius of the cam, r₂ = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement) (r₁ - r₂) (1 - cosθ) (r₁ - r₂) [(1 - cosθ)/cosθ] (r₁ + r₂) [(1 - cosθ)/cosθ] (r₁ + r₂) (1 + cosθ) (r₁ - r₂) (1 - cosθ) (r₁ - r₂) [(1 - cosθ)/cosθ] (r₁ + r₂) [(1 - cosθ)/cosθ] (r₁ + r₂) (1 + cosθ) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a Screw pair Spherical pair Turning pair Sliding pair Screw pair Spherical pair Turning pair Sliding pair ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Whirling speed of the shaft is the speed at which Shaft tends to vibrate vigorously in transverse direction Shaft tends to vibrate in longitudinal direction Torsional vibrations occur Combination of transverse and longitudinal vibration occurs Shaft tends to vibrate vigorously in transverse direction Shaft tends to vibrate in longitudinal direction Torsional vibrations occur Combination of transverse and longitudinal vibration occurs ANSWER DOWNLOAD EXAMIANS APP
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