Question 421Electricity & Electronics - Assistant Engineer

The correct answer is D) Ward-Leonard. The Ward-Leonard method is a well-known DC motor speed control technique used in various industrial applications, including vessels. This method utilizes a generator coupled to the prime mover (such as an engine) to control the armature voltage of the DC motor, allowing for smooth and efficient speed regulation. The other options are not directly related to the Ward-Leonard speed control method. Sperry-Rand, Atlas-Copco, and Burmeister-Wain are not commonly associated with this specific motor control technique.