Question

Centre-line feeding resistance CFR indicates the difficulty of feeding a given alloy in a mould Normally feeding is considered to be difficult if

• A. CFR > 70%
• B. CFR = 68%
• C. CFR = 48%
• D. 48% < CFR < 68%

Hint:

In casting CFR is used to evaluate mold filling efficiency A high CFR indicates difficulties in achieving a full mold without defects

Answer 1

The Correct Option is A

Centre-line feeding resistance CFR is an important parameter in casting processes that measures the resistance to filling the mold A CFR greater than 70% typically indicates that the feeding of the material into the mold is difficult This could lead to issues such as improper filling or void formation in the final casting A lower CFR value indicates better feeding capability