Govt. Exams
Entrance Exams
Stainless steel provides excellent corrosion resistance, high strength, and better sealing properties in hydraulic applications compared to other options.
Center distance = (m × (T₁ + T₂))/2 = (4 × (20 + 60))/2 = 160 mm
Velocity ratio = D₂/D₁ = N₁/N₂. Therefore, 3 = D₂/100, giving D₂ = 300 mm
Flexible couplings are designed to accommodate angular, parallel, and axial misalignments while reducing shock loads and vibrations transmitted between shafts.
Multi-plate clutches have multiple contact surfaces, providing significantly higher torque transmission capacity in the same axial space, making them ideal for high-power applications with space constraints.
Woodruff keys are semi-circular keys that transmit torque between shaft and hub while providing advantages in manufacturing and maintenance due to their design that allows for easier replacement.
Load capacity in journal bearings is directly proportional to bearing length. Doubling the length doubles the total load-carrying area, thereby doubling the load capacity.
In butt welds under tensile loading, direct tensile stress perpendicular to the weld throat is the primary failure mode. The joint must be designed to resist this normal stress effectively.
For cyclic loading, fatigue strength and endurance limit are critical as they define the maximum stress that can be applied indefinitely without failure.
Interference fit (or press fit) results in permanent assembly with no relative motion, as the hole size is smaller than the shaft size, creating an interference.
