These engines have transformed transportation, warfare and fun. How much do you know about jet engines?
Jet engines are combustion engines that produce what?
Before jet engines, what type of engines were used to power aircraft?
- kerosene engines
- piston engines
- steam engines
What is the land-speed record for a jet-powered car?
- about 1,100 mph
- about 760 mph
- about 420 mph
Jet engines are also sometimes referred to as what?
- gas turbine engines
- in-line engines
- compression engines
Which type of jet engine is often used to power helicopters?
What's the approximate maximum speed of a ramjet-propelled aircraft?
- 1,200 mph
- 3,300 mph
- 4,500 mph
The first jet engines were nearly simultaneously invented by Dr. Hans von Ohain and which other inventor?
- Richard Pearae
- Frank Whittle
- The Wright Brothers
By which decade were jet engines basically the standard type of propulsion for combat aircraft?
Jet engines are a type of reaction engine, meaning they rely heavily on which of Newton's laws of motion?
- Newton's first law
- Newton's second law
- Newton's third law
Which country was the first to mass produce a jet-fighter plane?
- United States
What was the nickname for the Messerschmitt Me 262?
- Thunder Blow
- Lightning Strike
- Storm Bird
What is a defining characteristic of a free-turbine engine?
- The turbines use free-spinning bearings for better efficiency.
- The turbines spin independently of other rotating engine parts.
- The turbines are free as part of the engine purchase.
The jet engine combustor combines air with what component?
Which type of jet engine was the first to be produced for real-world use?
What do jet engines expel from their rear nozzles?
In a jet engine, what is the purpose of a mixer?
- to quiet the engine
- to equalize air pressure inside and outside the engine
- to combine the fuel and air
Between which altitudes do turboprop engines generally generate their highest efficiency?
- between 5,000 and 10,000 feet
- between 10,000 and 20,000 feet
- between 20,000 and 30,000 feet
What does an afterburner do?
- adds nitrous to jet exhaust
- ignites extra gases at the engine intake
- provides added thrust
During takeoff, by what percentage can an afterburner increase thrust?
- 10 percent
- 20 percent
- 40 percent
In a turboprop engine, what drives the spinning of the propeller?
- the combustion chamber
- the turbine
- the compressor fans
Air flows through the engine at supersonic speeds in which type of engine technology?
What is the biggest jet aircraft engine in the world?
How much thrust did the GE90-115B produce to break the world record?
- 112,800 pounds of thrust
- 127,900 pounds of thrust
- 132,300 pounds of thrust
What's the average unit cost for the GE90-115B?
- $24 million
- $12 million
- $6 million
Which series of aircraft were the first supersonic fighter planes used widely in the United States Air Force?
- Buffalo Series
- Century Series
- Merlin Series
Most modern commercial airplanes use which type of jet engine?
When the air-fuel mixture in a jet engine ignites, it can reach what temperature?
- around 600 degrees Fahrenheit
- around 1200 degrees Fahrenheit
- around 2600 degrees Fahrenheit
The most powerful jet fighter engine in the world produces how much thrust?
- 43,000 pounds of thrust
- 62,000 pounds of thrust
- 98,000 pounds of thrust
Why do turbofan engines route some air on the periphery of the main body of the engine?
- to double the engine's power
- to keep the engine quieter
- to stabilize the plane
Which engine has been used for more fighter aircraft than any other?
- Pratt & Whitney F100
- GE F110
- GE F414