Oilers/Plant Tenders (HHC) Civil Service Practice Exam

An engine indicator is used on a reciprocating engine to determine what aspect of the engine?

1. Fuel efficiency

2. Temperature

3. Performance

4. Power output

The correct answer is: Performance

The correct answer highlights the primary function of an engine indicator in a reciprocating engine, which is to evaluate the performance of the engine. Engine indicators are specifically designed to assess various performance parameters, including pressures in the engine cylinders during different strokes of the engine cycle. This information is essential for understanding how efficiently the engine is operating, diagnosing issues, and optimizing its performance characteristics. An engine indicator provides valuable insights into the engine's operation, such as indicating whether the engine is producing power effectively, or if there are discrepancies in pressure which may suggest mechanical issues. This is a crucial aspect for operators and technicians who want to maintain or enhance the efficiency and reliability of the engine. While aspects like fuel efficiency, temperature, and power output are related to engine operation, the engine indicator primarily focuses on the performance evaluation by measuring pressure changes in each cylinder, thereby directly reflecting the health and efficiency of the engine in real time.