Workshop Technology
The temperature at which the new grains are formed in the metal is called

Eutectic temperature
Lower critical temperature
Upper critical temperature
Recrystallisation temperature

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
A jolt machine is used to

Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform packing of sand in the mould
Produce uniform sand hardness throughout the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

ANSWER DOWNLOAD EXAMIANS APP