Question 352Electricity & Electronics - Assistant Engineer

The correct answer is A) maintaining type push button with a mechanical interlock. The symbol shown in figure "6" of the illustration EL-0026 represents a maintaining type push button with a mechanical interlock. This means that the push button will stay in the actuated position until it is manually reset, and its operation is mechanically linked to another device or system, such as an interlock. The other options are incorrect because: B) describes a normally closed contact held open by an interlock, which is a different type of symbol. C) describes a maintaining type push button with an electrical interlock, which is also a different symbol. D) describes a limit switch, which has a different symbol than the one shown in the illustration.