In a hot chamber die casting machine

[A]. ferrous alloys with low melting temperature are casted
[B]. ferrous alloys with high melting temperature are casted
[C]. non-ferrous alloys with low melting temperature are casted
[D]. non-ferrous alloys with high melting temperature are casted
✅ The correct answer is option C.

In a four high rolling mill, there are four rolls out of which

[A]. one is working roll and three are backing up rolls
[B]. two are working rolls and two are backing up rolls
[C]. three are working rolls and one is backing up roll
[D]. all of the four are working rolls
✅ The correct answer is option B.