What does numerical in ‘IC 11‘ indicate?

Q.  What does the numerical in ‘IC 11‘ indicate?
- Published on 29 Sep 15

a. First numerical indicates the machine is free air circulation.
Second numerical indicates that the coolant is self circulated.
b. First numerical indicates that the coolant is self circulated.
Second numerical indicates the machine is free air circulatio
c. First numerical indicates the machine is free air circulation.
Second numerical indicates that the coolant is circulated by integrally mounted component.
d. First numerical indicates that the coolant is circulated by integrally mounted component.
Second numerical indicates the machine is free air circulation.

ANSWER: First numerical indicates the machine is free air circulation.
Second numerical indicates that the coolant is self circulated.

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