Q 01/05

Roughly what share of the world's electricity did nuclear power plants supply in 2023?

A) About 25%

B) About 40%

C) About 9%

D) About 2%

Answer · why

C) About 9%

That made nuclear the second-largest low-carbon power source after hydroelectricity, and there were 416 civilian reactors running worldwide as of late...

Q 02/05

Which country generates the highest percentage of its electricity from nuclear reactors?

A) Russia

B) Japan

C) United States

D) France

Answer · why

D) France

France built 25 plants in 15 years after the 1970s energy shocks and hit 71% nuclear electricity by 2019.

Q 03/05

Which country has the largest nuclear reactor fleet and produces the most nuclear electricity?

A) South Korea

B) Soviet Union

C) United States

D) Great Britain

Answer · why

C) United States

Its reactors generate almost 800 TWh a year at an average capacity factor of 92%, yet that is only about 19% of the electricity Americans consume.

Q 04/05

To what level of uranium-235 is fuel typically enriched for civilian light water reactors?

A) 90–93%

B) 0.7–1%

C) 20–25%

D) 3.5–5%

Answer · why

D) 3.5–5%

Weapons need far higher enrichment; Shippingport's first core, taken from a cancelled aircraft carrier, used 93% seed fuel.

Q 05/05

Which NASA probe is the textbook example of a spacecraft powered by a radioisotope thermoelectric generator?

A) Skylab

B) Voyager 2

C) Sputnik 1

D) Hubble

Answer · why

B) Voyager 2

Radioisotope thermoelectric generators produce only a few kilowatts but keep working for decades where sunlight is too weak for solar panels.