Final answer:
For normal aircraft takeoffs and landings, hydraulic system B pumps should typically be set to the 'ON' position to ensure full operation of hydraulic-powered control surfaces and systems.
Step-by-step explanation:
The student's question pertains to the operation of hydraulic systems in aircraft during takeoffs and landings. In general aviation practices, for normal takeoffs and landings, the hydraulic system B pumps are usually set to the 'ON' position. This ensures that the hydraulic system is fully operational and can provide the necessary power to the aircraft's control surfaces and other systems, such as power brakes in airplanes or the hydraulic systems in heavy machinery like bulldozers.