Question 52Motor Plants - QMED

The correct answer is A) vane motors. Vane motors are the type of air motors commonly used for starting auxiliary diesel engines on vessels. These motors use compressed air to power rotating vanes that drive the engine's starting mechanism. This makes them well-suited for this application, as they can provide the necessary torque to crank over and start the diesel engine. The other answer choices are not the typical air motor used for this purpose. Accumulator motors, plunger motors, and gear motors have different operating principles that are less commonly applied to diesel engine starting systems compared to the vane-type air motor.