While machining cast iron generally cutting fluid is not required because
A)Cast iron surface is generally rough
B)The cast iron jobs revolves at low speeds
C)Cast iron contains graphite which does not allow temperatures to rise
D)Cast iron contains carbon which cools the job
E)None of the above

Question

Quizplus · Accepted Answer

Cast iron contains graphite, which acts as a lubricant and helps in dissipating heat, thereby reducing the need for external cutting fluids. This property of graphite helps in keeping the temperatures lower during the machining process.

While Machining Cast Iron Generally Cutting Fluid Is Not Required