Question 266Electricity & Electronics - Assistant Engineer

The correct answer is B) Thermostatically controlled electric jacket water heaters. According to 46 CFR Subchapter J, thermostatically controlled electric jacket water heaters are the only starting aid method allowed to ease the starting of emergency diesel-generator engines. This is because jacket water heaters help maintain the engine at an optimal temperature for quick starts, without the safety and environmental concerns associated with other starting aids like ether injection systems. The other options, such as electric, steam, or hot water heated lube oil heaters (option C) and electric air intake heaters (option D), are not permitted as starting aids for emergency diesel-generators under the Coast Guard regulations.