[amp_mcq option1=”complete” option2=”tight” option3=”loose” option4=”free” correct=”option3″]
The best form of coupling is complete. A complete coupling is one in which the two shafts are aligned and the coupling is able to transmit the full torque from one shaft to the other. A tight coupling is one that is difficult to separate, but it may not be able to transmit the full torque if the shafts are not aligned. A loose coupling is one that is easy to separate, but it may not be able to transmit any torque if the shafts are not aligned. A free coupling is one that allows the shafts to rotate independently of each other, and it cannot transmit any torque.
A complete coupling is the best form of coupling because it provides the most efficient transmission of power from one shaft to the other. A tight coupling may be able to transmit more power than a loose coupling, but it is more difficult to install and remove. A free coupling is not useful for transmitting power, but it may be useful for allowing two shafts to rotate at different speeds.