Question

post-test
all of the following are a type of steel except:
a. ultra high - strength.
b. high - strength.
c. boron - alloyed.
d. ultra mild.

Explanation:

Steel types are categorized based on properties like strength and alloying elements. Ultra high - strength and high - strength refer to strength - based classifications. Boron - alloyed is an alloy - based type. However, "ultra mild" is not a recognized standard type of steel.

Answer:

D. Ultra mild.