Discussion
Consider the following statements about starting systems.
1. A pre-engaged starter meshes the pinion before applying full power.
2. Voltage drop testing isolates a poor connection during cranking.
3. A glow plug provides the spark that ignites the diesel fuel.
Which of the statements given above is or are correct?
Answer: C
The first two are correct, but a diesel has no spark at all and the glow plug simply heats the chamber so compression can raise the charge to ignition temperature. The distinction is fundamental to the two combustion processes. Naming what changes and what stays the same is the reliable route through questions of this shape. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.
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