44) The charge is fed into the blast furnace through the

Answer is:

Throat

Explanation:

stack:The portion of the blast furnace above its widest cross-section is called stack.

Bosh:The portion of the blast furnace below its widest cross-section is called bosh.

Throat: The charge is fed into the blast furnace through the throat.

Hearth: The hearth is the lowest, but the most important part of the blast furnace.

The charge is fed into the blast furnace through the

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45) Adjustable screw plate die is used for

Answer is:

Chasing or reconditioning

Explanation:

Adjustable screw plate die is used for chasing or reconditioning
Round Adjustable Dies are used to cut right hand external threads, both initial threads and in the repair and maintenance of rusty or worn threads. They are made with a slot in the circumference and a special screw to allow for cutting a slightly smaller size.