In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.

Answer: Option B

In a squeeze machine, there is a squeezer head or a plate which is used as a pressing board to force the sand inside or compress it.
This machine is mostly used for shallow patterns.
These machines are classified as, squeeze machine, sand slinger, jolt-squeeze machine and sand slinger.