Correct option is B
A
fluid coupling is used in power transmission systems to provide a
soft start and to absorb
shocks during operation. It operates based on
hydraulic principles, where power is transmitted through a circulating fluid rather than direct mechanical contact. This prevents sudden jerks or overloads, making it ideal for
high-inertia systems like conveyors, crushers, and heavy-duty machinery.
Unlike rigid couplings that transfer torque
directly, a fluid coupling allows for
slip between the input and output shafts, enabling a
gradual increase in speed when starting a machine. This reduces
wear and tear on components and extends the life of the equipment.
