Question

Other things being equal the higher the compression ratio the larger is the proportion of the heat energy of combustion turned into useful work at the crankshaft

a. true
b. false

Answer 1

A higher compression ratio in an engine leads to a larger proportion of the heat energy of combustion being turned into useful work at the crankshaft.

Step-by-step explanation:

The statement is true. Other things being equal, a higher compression ratio in an engine leads to a larger proportion of the heat energy of combustion being turned into useful work at the crankshaft. This is because a higher compression ratio results in a greater expansion of the air-fuel mixture during the power stroke, which translates into more work output.