7000+ Objective Questions on Steel Making - 1

Question: 1

Which of the following is added in basic open hearth furnace to increase the fluidity of the slag?

(A) Limestone

(B) Fluorspar

(C) Scrap

(D) Iron ore

Question: 2

Maximum temperature in electric arc process of steel making is attained

(A) At the end of oxidation period

(B) At the time of metal tapping

(C) During reducing period

(D) During deoxidation period

Question: 3

Coating of ingot moulds with coal tar prior to steel pouring in it is done for

(A) Avoiding ingotism

(B) Avoiding pipe defect

(C) Eliminating blow holes

(D) Easy stripping of ingot

Question: 4

Duration before the steel melting furnace is again due for relining is called the ____ time.

(A) Blowing

(B) Down

(C) Heat

(D) Campaign

Question: 5

Which of the following alloying elements are added to molten steel in elemental form?

(A) Boron

(B) Silicon

(C) Cobalt

(D) Zirconium