Question 1
EasyWhat gas is used to provide lift in a hot air balloon?
- Heated air (Correct answer)
- Helium
- Hydrogen
- Pure oxygen
Source: Hot air balloons simply heat ordinary air, which expands and becomes lighter than the cooler air around it.
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▶ Play today's quizWhat gas is used to provide lift in a hot air balloon?
Source: Hot air balloons simply heat ordinary air, which expands and becomes lighter than the cooler air around it.
What is the main job of an airplane's black box?
Source: Despite the name, black boxes are painted bright orange to make them easier to find after a crash.
Which airport code identifies London Heathrow?
Source: LHR is Heathrow; nearby Gatwick uses LGW, which trips up many travelers.
What does an aircraft's altimeter measure?
Source: Altimeters read altitude from air pressure, which is why pilots must reset them as weather changes.
Which company manufactures the 747 jumbo jet?
Source: The Boeing 747's hump-backed shape made it one of the most recognizable planes ever built.
What are the engines on most modern passenger jets called?
Source: Turbofans use a huge front fan for thrust, which is why airliners are far quieter than old jets.
Which control surfaces let an airplane roll left or right?
Source: Ailerons on the wingtips move in opposite directions to bank the plane into a turn.
What is the common name for a plane's automatic flight control?
Source: Autopilot handles steady cruising, but pilots still perform most takeoffs and landings by hand.
Which document must a pilot earn before flying solo legally?
Source: A logbook records hours but grants nothing; the license is what legally authorizes flight.
What phonetic word do pilots use for the letter A?
Source: The NATO alphabet uses Alpha, Bravo, Charlie so crackly radio calls are never misheard.
Which aircraft was the first supersonic passenger airliner in service?
Source: Concorde crossed the Atlantic in about three hours, faster than the Earth's own rotation at that latitude.
What instrument shows whether an aircraft is climbing or descending?
Source: The vertical speed indicator reads feet per minute, lagging slightly behind the actual change.
Which phase of flight statistically sees the most accidents?
Source: Approach and landing pack the most risk into the fewest minutes of any flight phase.
What does the term 'angle of attack' describe?
Source: Push the angle of attack too high and the wing stalls, no matter how fast the plane is flying.
Which airline operated the world's first scheduled jet service?
Source: BOAC launched the de Havilland Comet in 1952, beating American carriers to the jet age.
What weather hazard creates dangerous sudden downdrafts near the ground?
Source: A microburst can slam a plane downward faster than engines can recover, a known killer on approach.
What is the name for the imaginary boundary planes cross at 18,000 feet in the US?
Source: Above the transition altitude all US pilots set the same standard pressure, keeping everyone's altitudes aligned.
Which pioneer made the first nonstop solo flight across the Atlantic?
Source: Lindbergh stayed awake 33 hours in 1927; Earhart only matched the solo crossing five years later.
What does a 'V1' callout mean during takeoff?
Source: Past V1 the runway is too short to stop, so the crew is committed to flying no matter what.
Which physical effect lets a wing generate most of its lift?
Source: Faster air over the curved top means lower pressure there, and the higher pressure below pushes the wing up.