Manufacturing And Production Technology
Shrinkage allowance on pattern is provided to compensate for shrinkage when

The temperature of metal drops from pouring to room temperature
The temperature of solid phase drops from freezing to room temperature
The metal changes from liquid to solid state at freezing temperature
The temperature of liquid metal drops from pouring to freezing temperature

ANSWER DOWNLOAD EXAMIANS APP

Manufacturing And Production Technology
The primary purpose of a sprue in a casting mould is to

Feed the casting at a rate consistent with the rate of solidification
Act as a reservoir for molten metal
Help feed the casting until all solidification takes place
Feed molten metal from the pouring basin to the gate

ANSWER DOWNLOAD EXAMIANS APP