What are the main engine indications you monitor during flight?

• A. Airspeed, altitude, vertical speed, and attitude indicators.
• B. RPM or power, oil pressure, oil temperature, cylinder head temperature or EGT/CHT, fuel quantity, and electrical system indicators.
• C. Fuel quantity and outside air temperature only.
• D. Oil pressure and engine RPM with no temperatures or electrical indicators.

Answer: (B)

The main concept is recognizing which engine indicators pilots monitor to keep the engine operating safely and within limits. The best answer includes RPM or power, oil pressure, oil temperature, cylinder head temperature or EGT/CHT, fuel quantity, and electrical system indicators. These measurements give a complete picture of the engine’s performance and health: RPM shows the engine’s power output and helps set and verify the desired power setting; oil pressure confirms that lubrication is being delivered properly to prevent wear or seizure; oil temperature indicates whether the engine is cooling adequately and not running hot; cylinder head temperature or EGT/CHT reveals combustion chamber temperatures, aiding in leaning and avoiding overheating or detonation; fuel quantity ensures you won’t run out and helps manage fuel management; electrical indicators monitor the charging system and electrical loads, which can impact avionics and other critical systems.

Other options mix in flight attitude or performance instruments or omit important engine parameters. Airspeed, altitude, vertical speed, and attitude indicators reflect aircraft flight status rather than engine condition. A setup that only shows temperatures or only a couple indicators misses other critical aspects of engine health. A setup with only oil pressure and RPM omits temperatures and electrical indicators that are essential for detecting overheating or electrical faults.