Q141
A taper provided on the pattern for its easy and clean withdrawal from the mould is known as
A.
Machining allowance
B.
Draft allowance
AnswerC.
Shrinkage allowance
D.
Distortion allowance
Answer: Option B
Solution
Answer: Option B
Solution:
Draft Allowance. By draft is meant the taper provided by the pattern maker on all vertical surfaces of the pattern so that it can be removed from the sand without tearing away the sides of the sand mold and without excessive rapping by the molder.