The occurrence of casting defect ‘rat tail’ is possible because of – McqOptions

MCQOPTIONS

1.	The occurrence of casting defect ‘rat tail’ is possible because of1. Soft ramming of sand2. The continuous large flat surface on the mould3. The excessive hardness of the mouldWhich of the above reasons is correct?
A.	1 and 2 only
B.	2 and 3 only
C.	1 and 3 only
D.	1, 2 and 3
Answer» C. 1 and 3 only

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