QFE sets the altimeter to the pressure at the airfield surface, so the instrument uses that surface as its zero reference. The readout then shows height above the airfield itself, i.e., the altitude above the ground (absolute altitude, or AGL). On the ground it reads zero, and as you climb, the display increases by the height you’ve gained above that field’s surface. This is different from setting QNH, which makes the altimeter indicate height above mean sea level (true/AMSL), and from the standard 29.92 setting used for pressure altitude.

Carburetor heat introduces warmer, less dense air into the intake. For a given throttle setting, the volume of air entering the engine is about the same, but the mass of that air is reduced. The carburetor meters fuel in response to air flow, so with less dense air the fuel flow doesn’t decrease proportionally, making the mixture richer. A richer mixture reduces combustion efficiency and power, so engine RPM tends to drop when carb heat is applied even if there’s no ice present.

Before takeoff, you must be familiar with information that directly affects the flight’s safety and feasibility. For a VFR flight away from the departure airport, the regulations require you to determine the runway lengths at airports of intended use and the aircraft’s takeoff and landing distance data. Knowing these distances lets you assess whether your aircraft can operate safely on the available runways under current weight, density altitude, wind, and obstacle considerations, and helps you decide if alternate plans are needed. Medical certificate validity is a general requirement for flight, but it isn’t the specific data-focused action highlighted here. Fuel planning is important, but the explicit preflight action emphasized for away-from-departure scenarios centers on runway lengths and takeoff/landing distance data, which directly pertain to performance and safe operation. Takeoff distance covers the runway needed to reach liftoff and clear obstacles, while landing distance covers what’s required to stop within the runway, both of which are essential for sound preflight planning.

The main idea is to keep the landing phase safe by standardizing actions and keeping everyone on the same page. A landing checklist guides you through a proven sequence of critical items—airspeed, flaps, gear, fuel, mixtures, lights, and so on—so nothing important is missed during the high-workload moments before touchdown. Crew resource management adds to that by clarifying roles, ensuring clear communication, and enabling mutual monitoring and cross-checks. Even in small aircraft, this means the pilot and any crew or passengers know who is handling what, who will read back important information, and how to call out potential issues so decisions are coordinated and timely. In practice, this combination helps maintain situational awareness and reduces the chance of overlooked steps or miscommunication during approach and landing. The other options don’t fit because reviewing maintenance logs after landing and performing a visual exterior inspection are separate activities, and ignoring crew communications during landing is unsafe and contradicts the purpose of CRM.