An engine has a rated speed of 2000 rpm and has 40% torque rise. At what rpm would you expect to find peak torque?
A) 2000 rpm
B) 800 rpm
C) 1200 rpm
D) 2800 rpm

Question

Quizplus · Accepted Answer

Torque rise is the percentage increase in torque above the rated torque at rated speed. A 40% torque rise means the engine produces its peak torque below its rated speed. Since the rated speed is 2000 rpm, and the torque rise indicates increased torque at lower speeds, peak torque would typically be found at a lower rpm than the rated speed. The correct answer, 1200 rpm, is a reasonable estimate given the information, as it suggests the engine reaches peak torque significantly below its rated speed, which aligns with the concept of torque rise.

An Engine Has a Rated Speed of 2000 Rpm and Has