Theory of Machine Which of the following statements regarding laws governing the friction between dry surfaces are correct? All of these The friction force is dependent on the materials of the contact surfaces. The friction force is independent of me area of contact. The friction force is directly proportional to the normal force. All of these The friction force is dependent on the materials of the contact surfaces. The friction force is independent of me area of contact. The friction force is directly proportional to the normal force. ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Angle of ascent of cam is defined as the angle Moved by the cam from the instant the follower begins to rise, till it reaches its highest position Through which the cam rotates during the period in which the follower remains in highest position Of rotation of the cam for a definite displacement of the follower During which the follower returns to its initial position Moved by the cam from the instant the follower begins to rise, till it reaches its highest position Through which the cam rotates during the period in which the follower remains in highest position Of rotation of the cam for a definite displacement of the follower During which the follower returns to its initial position ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The Coriolis component of acceleration leads the sliding velocity by 90° 45° 135° 180° 90° 45° 135° 180° ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The frequency of oscillation of a torsional pendulum is r/2πk. √(l/g) r/2πk. √(g/l) 2πk/r. √(g/l) 2πr/k. √(g/l) r/2πk. √(l/g) r/2πk. √(g/l) 2πk/r. √(g/l) 2πr/k. √(g/l) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than 0.25 2 0.5 1 0.25 2 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The rotating shafts tend to vibrate violently at whirling speeds because The system is unbalanced Bearing centre line coincides with the axis Resonance is caused due to the heavy mass of the rotor The shafts are rotating at very high speeds The system is unbalanced Bearing centre line coincides with the axis Resonance is caused due to the heavy mass of the rotor The shafts are rotating at very high speeds ANSWER DOWNLOAD EXAMIANS APP
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