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Which starter type is used on very large diesel engines?

  • A.An air start motor or a twenty four volt electric starter
  • B.A twelve volt starter of increased size, which is adequate because the torque depends upon the current drawn
  • C.A hydraulic starter only
  • D.A pony motor, which is a small petrol engine used to crank the main engine and is still standard practice today

Answer: A

Marine and large industrial engines use compressed air or twenty four volt electric starters. Hydraulic and pony motor starting are both genuine historical and specialised methods, which makes those options real rather than invented. Naming what changes and what stays the same is the reliable route through questions of this shape. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Working one numerical case through both cases side by side fixes the distinction better than any rule of thumb.

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