Question

If the intake of an I.C. engine increases, its efficiency will

• A. increase
• B. decrease
• C. remain same
• D. depend on other factors

Answer 1

Answer: (B)

decrease

If the intake of an I.C. engine increases, its efficiency decreases

the efficiency of engine decreases as the temperature of inlet air increases. As, the air becomes thinner at higher temperature so it does not expand much so doing less work and thus, reducing engine efficiency.

The efficiency of engine increases as the temperature of inlet air decreases, increasing the density of air. Thus, air expands more producing more work. The turbocharger and supercharger are employed for taking more air to increase engine efficiency.