HOW STUFF WORKS
QUIZZES

FOLLOW US
The Rocket Engines Quiz
by Staff
These machines have helped humankind blaze new trails to the heavens. How much do you know about rocket engines?

LOX/RP-1 engines use what sort of chemicals as their fuel?

  • liquid hydrogen and gasoline
  • solid gunpowder and liquid oxygen
  • liquid oxygen and kerosene

Newton's third law of motion says that for every action force there is an equal and opposite WHAT?

  • universal force
  • explosion
  • reaction

Alan Shepard was the first American in space. Which rocket got him there?

  • Titan
  • Redstone
  • Atlas

Rockets require what to fly through the air?

  • thrust
  • lift
  • wings

How are the chemicals in a solid rocket combined before ignition?

  • They are stored in separate tall cylinders inside the rocket's body.
  • They are blended and packed into the rocket before it launches.
  • Hoppers combine the powders during flight.

The Bell X-1A is best known for accomplishing which feat?

  • costing more than any rocket program in history
  • crashing near the White House
  • breaking the sound barrier

What type of rockets were the first created by humans?

  • chemical rockets
  • solid-fuel rockets
  • thermal rockets

In order to work properly, liquid rockets require propellant and what other chemical component?

  • thinner
  • oxidizer
  • cleanser

What is the primary ingredient in the rocket fuel called RP-1?

  • kerosene
  • liquid oxygen
  • liquid hydrogen

In which country were rockets invented?

  • Egypt
  • China
  • Germany

What is added to a turborocket to make it fly higher?

  • nitrous
  • aerosolized kerosene
  • more oxidizer

The three propellants used in a tripropellant rocket are usually hydrogen, hydrocarbon and what?

  • liquid hydrogen
  • RP-1
  • liquid oxygen

Which person first proposed that rockets could be used to explore space beyond Earth's atmosphere?

  • Robert Goddard
  • Konstantin Tsiolkovsky
  • William Leitch

At which speed does a ramjet have its best efficiency?

  • between Mach 4 and 6
  • between Mach 2 and 4
  • between Mach 1 and 2

In what year was the first liquid-propellant rocket engine tested?

  • 1898
  • 1926
  • 1944

What sort of liquid did Goddard use in his first rocket?

  • kerosene and hydrogen
  • nitroglycerin and oxygen
  • gasoline and liquid oxygen

Which rocket was the first to propel an American into orbit?

  • Atlas
  • Delta
  • Saturn

Which rocket-powered craft set the world record for the highest speed attained by a manned aircraft?

  • Heinkel He 176
  • X-15
  • Lippisch Ente

What was the maximum speed of the X-15?

  • 4,520 mph
  • 5,123 mph
  • 5,892 mph

Solid-fuel rockets can sit idle for years before being launched.

  • TRUE
  • FALSE

What is one tremendous benefit of rocket engines over jet engines?

  • Rockets are less prone to breakage.
  • Rockets don't require air.
  • Rockets need less fuel.

What is a downside to using solid fuel in a rocket?

  • You can't halt their combustion.
  • They are rather dangerous.
  • They provide less power than other fuels.

What kind of rocket is only theoretical at this point?

  • gas core reactor rocket
  • fission sail
  • nuclear thermal rocket

Rocket exhaust is also called what?

  • working fluid
  • thrust event horizon
  • gaseous blowoff

Why do liquid rockets tend to be heavier than solid fuel rockets?

  • Liquids slosh around and cause weight issues.
  • Liquid fuel is heavier than solid fuel.
  • They have more parts.

What sort of fuel did NASA's space shuttles require?

  • thermal fuel
  • liquid fuel
  • solid fuel

Which rocket is the tallest and heaviest ever used for actual space operations?

  • Titan I
  • Delta 0100
  • Saturn V

What sort of fuel did the Saturn V use to make its trailblazing journeys?

  • liquid helium
  • liquid carbon
  • liquid oxygen

How many pounds of thrust could the Saturn V generate?

  • 1 million pounds
  • 5.2 million pounds
  • 7.6 million pounds

The Saturn V could generate 60 gigawatts of energy, which is about the peak energy demand of which country?

  • United Kingdom
  • Norway
  • Iceland