Engineering · Diesel — Exhaust Temperature
A single cylinder reading a noticeably higher exhaust temperature than the others most commonly indicates:
- AThat cylinder is misfiring (no combustion)
- BThe cooling water is too cold
- CLate/poor combustion or overload in that cylinder (e.g., a faulty injector burning fuel late)✓ Correct
- DThe turbocharger is oversped
Explanation
High exhaust temperature on one unit suggests afterburning/late combustion or overload in that cylinder — often a worn or dribbling injector, wrong timing, or fouled fuel. A low/cold reading instead suggests a misfire or no fuel delivery.
Authority: Modern Marine Engineer's Manual; engine diagnostics
Practice the full Engineering bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Engineering questions
- Diesel — Operating Cycle
In a four-stroke-cycle diesel engine, the events occur in which order?
- Diesel — Operating Cycle
Compared with a four-stroke engine of the same speed and cylinder size, a two-stroke-cycle diesel produces a power stroke:
- Diesel — Air Systems
The primary purpose of scavenging in a two-stroke diesel engine is to:
- Diesel — Air Systems
A turbocharger increases engine power output mainly by:
- Diesel — Combustion
Ignition of the fuel in a diesel engine is initiated by:
- Diesel — Fuel
The cetane number of a diesel fuel is a measure of its: