Theory of Machine The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to 135° and 315° 270° and 360° 90° and 180° 0° and 90° 135° and 315° 270° and 360° 90° and 180° 0° and 90° ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Kinematic pairs are those which have two elements that Permit relative motion Have line contact Are held together Have surface contact Permit relative motion Have line contact Are held together Have surface contact ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following mechanism is an approximate straight line motion mechanism? Watt's mechanism Grasshopper mechanism All of these Robert's mechanism Watt's mechanism Grasshopper mechanism All of these Robert's mechanism ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The rotating shafts tend to vibrate violently at whirling speeds because The system is unbalanced The shafts are rotating at very high speeds Resonance is caused due to the heavy mass of the rotor Bearing centre line coincides with the axis The system is unbalanced The shafts are rotating at very high speeds Resonance is caused due to the heavy mass of the rotor Bearing centre line coincides with the axis ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring) (S₁ + S₂) / 2h (S₁ + S₂) / h (S₁ - S₂) / 2h (S₁ - S₂) / h (S₁ + S₂) / 2h (S₁ + S₂) / h (S₁ - S₂) / 2h (S₁ - S₂) / h ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring) 1/2π. √(g/δ) 2π. √(δ/g) 2π. √(g/δ) 1/2π. √(δ/g) 1/2π. √(g/δ) 2π. √(δ/g) 2π. √(g/δ) 1/2π. √(δ/g) ANSWER DOWNLOAD EXAMIANS APP
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