A Nuclear Submarine Uses Its Reactor to Heat Water/steam to a Temperature

question 26

Multiple Choice

A nuclear submarine uses its reactor to heat water/steam to a temperature of 950 ^$\circ$ C.The steam drives turbines that turn the submarines propellers.After the steam passes through the turbines it is cooled to 4 ^$\circ$ C and condensed by the seawater that surrounds the submarine and returned to be heated by the reactor again.What is the upper limit of the efficiency of the submarine's turbines?

• A)21.7%
• B)38.6%
• C)77.4%
• D)85.1%
• E)99.6%

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Definitions:

War Industries Board

A U.S. government agency established during World War I to coordinate the purchase of war supplies and to ensure efficient production and distribution.

Eugenics

A belief and practice aimed at improving the genetic quality of the human population, often through selective breeding and sometimes associated with morally controversial policies.

Public Policy

The set of principles and actions adopted and implemented by governmental entities to solve societal issues or achieve specific goals.

Nativism

The political policy of promoting the interests of native inhabitants against those of immigrants, including the support of immigration-restriction measures.