Do different type of knots affect the breaking strength a rope?

Yes, different types of knots can affect the breaking strength of a rope. When a knot is tied, it creates a point of stress concentration where the rope is bent and twisted. This can weaken the rope and make it more susceptible to breaking. The strength of a knot is determined by its efficiency, which is the ratio of the knot's breaking strength to the breaking strength of the unknotted rope. The efficiency of a knot can vary depending on the type of knot, the rope diameter, and the material the rope is made of.

Generally speaking, knots that create a sharp bend in the rope, such as the overhand knot, have a lower efficiency than knots that create a gradual bend, such as the figure-eight knot. Knots that are tied with multiple turns, such as the double fisherman's knot, are generally stronger than knots that are tied with a single turn, such as the square knot.

It is important to choose the right knot for the application to ensure that the rope is strong enough for the task at hand. For critical applications, it is recommended to consult a rope manufacturer or expert to determine the best knot to use.