Machine Design A screw will be self locking, if Friction angle is more than helix angle Friction angle is equal to helix angle Efficiency of screw is 100% Friction angle is less than helix angle Friction angle is more than helix angle Friction angle is equal to helix angle Efficiency of screw is 100% Friction angle is less than helix angle ANSWER DOWNLOAD EXAMIANS APP
Machine Design The efficiency of a square threaded screw is maximum if the helix angle is equal to(Where φ = Angle of friction) 90° - φ 45° - φ/2 45° - φ 45° + φ/2 90° - φ 45° - φ/2 45° - φ 45° + φ/2 ANSWER DOWNLOAD EXAMIANS APP
Machine Design If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will Increase None of these Decrease Have same value as that of standard specimen Increase None of these Decrease Have same value as that of standard specimen ANSWER DOWNLOAD EXAMIANS APP
Machine Design Spring index is Its capability of storing energy Indication of quality of spring Load required to produce unit deflection Ratio of coil diameter to wire diameter Its capability of storing energy Indication of quality of spring Load required to produce unit deflection Ratio of coil diameter to wire diameter ANSWER DOWNLOAD EXAMIANS APP
Machine Design The creep in the belt is due to Material of belt Stresses beyond elastic limit of belt material Effect of temperature on belt Unequal extensions in the belt due to tight and slack side tensions Material of belt Stresses beyond elastic limit of belt material Effect of temperature on belt Unequal extensions in the belt due to tight and slack side tensions ANSWER DOWNLOAD EXAMIANS APP
Machine Design For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle) μ sinθ/(2θ + sin 2θ) 4μ sinθ/(2θ + sin 2θ) 2μ sinθ/(θ + sinθ) 4μ sinθ/(θ + sinθ) μ sinθ/(2θ + sin 2θ) 4μ sinθ/(2θ + sin 2θ) 2μ sinθ/(θ + sinθ) 4μ sinθ/(θ + sinθ) ANSWER DOWNLOAD EXAMIANS APP
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