Give two advantages of a four-high rolling mill opposed to a two-high rolling mill for the same output diameter.

Four- high rolling mill                              Two-high rolling mill

1.Small roll radius.That is why required  1.High roll radius.That is  required low power.           .                    why required high power.

2.  Low roll separating force.                   2.High roll separating

                                                                        force

answer:

a

explanation: