Theory of Machine When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the

Sum of the tensions on the tight side and slack side of the belt
Average tension of the tight side and slack side of the belt
Tension in the slack side of the belt
Tension in the tight side of the belt

Theory of Machine The maximum fluctuation of speed is the

Sum of maximum and minimum speeds
Difference of the maximum and minimum speeds
Difference of minimum fluctuation of speed and the mean speed
Variations of speed above and below the mean resisting torque line

Theory of Machine Klein's construction can be used to determine acceleration of various parts when the crank is at

All of the listed here
Right angles to the link of the stroke

Theory of Machine Inertia force acts

Along the direction of acceleration force
Opposite to the direction of acceleration force
Perpendicular to the acceleration force
None of the listed here

Theory of Machine The rotating shafts tend to vibrate violently at whirling speeds because

Bearing centre line coincides with the axis
The shafts are rotating at very high speeds
Resonance is caused due to the heavy mass of the rotor
The system is unbalanced