engineering recuitment HPCL Junior Executive 2025 Mock Test Production Engineering (Manufacturing) Metal Casting
A jolt machine is used to
1
ram the sand harder at the pattern face with decreasing hardness towards the back of the mould.
2
ram the sand harder at the back of the mould and softer on the pattern face.
3
produce uniform sand hardness throughout the mould.
4
produce uniform packing of sand in the mould.