Knuckle Joint and Socket Pin Joint:

A knuckle joint and a socket pin joint are two different types of joints used in mechanical engineering. Although they have some similarities, they are not the same.

Knuckle Joint:
A knuckle joint is a type of mechanical joint that is used to connect two rods or bars. It consists of a pin or bolt that passes through a pair of loops or eyes formed at the ends of the rods. The pin or bolt is usually cylindrical in shape and allows the rods to rotate freely around it. This joint is commonly used in situations where flexibility and rotational movement are required.

Socket Pin Joint:
A socket pin joint, on the other hand, is a type of joint that consists of a socket or housing and a pin or bolt. The socket is typically a hollow cylinder with a hole through it, while the pin or bolt is a cylindrical object that fits snugly into the hole. The pin or bolt is inserted into the socket, allowing the two parts to rotate or move relative to each other. This type of joint is commonly used in applications where a rigid connection is required.

Explanation of the Answer:
The given statement "A knuckle joint is also called a socket pin joint" is false. The two terms refer to different types of joints. A knuckle joint is a type of joint that allows rotational movement, while a socket pin joint provides a rigid connection between two parts.

Conclusion:
In conclusion, a knuckle joint and a socket pin joint are not the same. A knuckle joint allows rotational movement, while a socket pin joint provides a rigid connection. It is important to understand the differences between these two types of joints to ensure their correct application in mechanical engineering.