engineering recuitment ISRO Scientist Mechanical Mock Test Production Engineering (Manufacturing) Metal Casting
When a pattern is to be withdrawn from the mould, it is first shaken, by striking over it from side to side, so that its surface may be free of the adjoining sand wall of the mould. That causes the size of the mould cavity increases a little and a negative allowance is to be provided in the pattern to compensate the same, is known as:
1
Draft allowance
2
Rapping allowance
3
Machining allowance
4
Shrinkage allowance