Question 55Motor Plants - QMED70% to pass
Auxiliary diesel engine electric starting motors use _______________.
AI Explanation
You are correct, the answer is D) battery power direct current.
Auxiliary diesel engine electric starting motors use battery power direct current (DC) because this type of power source provides the necessary high amperage, low voltage electricity required to crank and start the diesel engine. The battery bank stores the DC power that is then delivered to the starter motor to turn over and start the engine.
The other options are incorrect because: A) low amperage, high voltage AC power would not provide sufficient current to the starter motor, B) alternating current transformers do not output the required DC power, and C) 400 cycle per second motor-generator power is not the typical power source used for diesel engine starters.
Related Questions
#53 When an engine fitted with a hydraulic starting system starts up, the starter is protected from the higher speed of the engine by _______________.#54 Hydraulic starters are installed on many lifeboat diesel engines instead of comparable air start systems, because _______________.#56 The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an _______________.#57 The purpose of the engine-driven hydraulic pump in an auxiliary diesel engine hydraulic starting system is to _______________.#58 In a medium-speed marine propulsion engine equipped with direct admission air starting valves, the cylinders without air starting valves fire first because the _______________.