The Rocket Engines Quiz

Estimated Completion Time
3 min
The Rocket Engines Quiz
Image: In Pictures Ltd./Corbis via Getty

About This Quiz

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
Correct Answer
Wrong Answer

The combination is ignitable and controllable.

Newton's third law of motion says that for every action force there is an equal and opposite WHAT?
universal force
explosion
reaction
Correct Answer
Wrong Answer

That law comes in play in every part of a rocket's construction and functionality.

Alan Shepard was the first American in space. Which rocket got him there?
Titan
Redstone
Atlas
Correct Answer
Wrong Answer

The Redstone was actually a military rocket meant to carry warheads, not people.

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Rockets require what to fly through the air?
thrust
lift
wings
Correct Answer
Wrong Answer

Without thrust, rockets can't even begin their missions.

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.
Correct Answer
Wrong Answer

They don't burn, though, until they are exposed to an igniter.

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
Correct Answer
Wrong Answer

This rocket-powered plane featured some improvements that let it top 1,600 mph in 1954.

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What type of rockets were the first created by humans?
chemical rockets
solid-fuel rockets
thermal rockets
Correct Answer
Wrong Answer

These rockets use a solid fuel propellant to create thrust.

In order to work properly, liquid rockets require propellant and what other chemical component?
thinner
oxidizer
cleanser
Correct Answer
Wrong Answer

The propellant and oxidizer are stored in separate compartments and then combined in a combustion chamber.

What is the primary ingredient in the rocket fuel called RP-1?
kerosene
liquid oxygen
liquid hydrogen
Correct Answer
Wrong Answer

The kerosene is refined and is in many ways a lot like jet fuel.

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In which country were rockets invented?
Egypt
China
Germany
Correct Answer
Wrong Answer

The Chinese developed rockets that used gunpowder as fuel back in the 1200s.

What is added to a turborocket to make it fly higher?
nitrous
aerosolized kerosene
more oxidizer
Correct Answer
Wrong Answer

With extra oxygen in the airstream, the thrust increases dramatically; the extra fuel, however, adds weight to the rocket.

The three propellants used in a tripropellant rocket are usually hydrogen, hydrocarbon and what?
liquid hydrogen
RP-1
liquid oxygen
Correct Answer
Wrong Answer

The light weight of the hydrogen cuts down on the heft that must be thrust upwards.

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Which person first proposed that rockets could be used to explore space beyond Earth's atmosphere?
Robert Goddard
Konstantin Tsiolkovsky
William Leitch
Correct Answer
Wrong Answer

He first envisioned the concept in 1861, long before other scientists ever thought of rockets for space travel.

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
Correct Answer
Wrong Answer

These rockets use compressed air burned with the rocket exhaust to create high speeds at good efficiency.

In what year was the first liquid-propellant rocket engine tested?
1898
1926
1944
Correct Answer
Wrong Answer

It was the year Robert Goddard worked out a few kinks in the development of these kinds of rockets.

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What sort of liquid did Goddard use in his first rocket?
kerosene and hydrogen
nitroglycerin and oxygen
gasoline and liquid oxygen
Correct Answer
Wrong Answer

His first rocket flew for fewer than three seconds and went four stories high.

Which rocket was the first to propel an American into orbit?
Atlas
Delta
Saturn
Correct Answer
Wrong Answer

The rocket sent John Glenn into orbit, where he circled the Earth three times.

Which rocket-powered craft set the world record for the highest speed attained by a manned aircraft?
Heinkel He 176
X-15
Lippisch Ente
Correct Answer
Wrong Answer

The U.S. X-15 went right up to the edge of outer space, meaning the pilots technically qualified as astronauts.

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What was the maximum speed of the X-15?
4,520 mph
5,123 mph
5,892 mph
Correct Answer
Wrong Answer

That's about Mach 6.72; that speed was achieved in October 1967.

Solid-fuel rockets can sit idle for years before being launched.
TRUE
FALSE
Correct Answer
Wrong Answer

These fuels are pretty stable; liquid fuel, however, is loaded just before the rocket is launched.

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.
Correct Answer
Wrong Answer

That means rockets work even in space, a place where jets would be useless.

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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.
Correct Answer
Wrong Answer

Once a solid rocket starts, it goes until the fuel is depleted.

What kind of rocket is only theoretical at this point?
gas core reactor rocket
fission sail
nuclear thermal rocket
Correct Answer
Wrong Answer

If they ever became a reality, they could be very useful for deep space missions.

Rocket exhaust is also called what?
working fluid
thrust event horizon
gaseous blowoff
Correct Answer
Wrong Answer

The rocket system accelerates working fluid and eventually creates thrust to launch the rocket.

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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.
Correct Answer
Wrong Answer

Liquid rockets require extra parts, like storage tanks and pumps, that add to their overall heftiness.

What sort of fuel did NASA's space shuttles require?
thermal fuel
liquid fuel
solid fuel
Correct Answer
Wrong Answer

The two huge boosters on the sides of the shuttles carried large loads of solid fuel for the journey towards space.

Which rocket is the tallest and heaviest ever used for actual space operations?
Titan I
Delta 0100
Saturn V
Correct Answer
Wrong Answer

The Saturn V is the rocket that enabled the Apollo missions to the moon.

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What sort of fuel did the Saturn V use to make its trailblazing journeys?
liquid helium
liquid carbon
liquid oxygen
Correct Answer
Wrong Answer

The rocket had two burn phases and three types of fuel, including liquid kerosene, liquid hydrogen and liquid oxygen.

How many pounds of thrust could the Saturn V generate?
1 million pounds
5.2 million pounds
7.6 million pounds
Correct Answer
Wrong Answer

The incredible thrust was necessary to send the 363-foot-tall rocket into the heavens.

The Saturn V could generate 60 gigawatts of energy, which is about the peak energy demand of which country?
United Kingdom
Norway
Iceland
Correct Answer
Wrong Answer

The crazy amount of power created by the Saturn V was nearly impossible to understand in layman terms.

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You Got:
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In Pictures Ltd./Corbis via Getty