UNIT-1 METAL CASTING

What is the process of converting raw materials into useful products called?

• Casting

• Manufacturing

• Molding

• Forging

What is the process of producing metal parts by pouring molten metal into the mold cavity of the required shape called?

• Welding

• Forging

• Casting

• Extrusion

Which type of casting process involves melting the metal and pouring it into a preformed cavity?

• Investment casting

• Centrifugal casting

• Sand casting

• Permanent mold casting

What is the main advantage of shell molding in casting?

• Low cost

• Good dimensional accuracy

• Design flexibility

• High production rate

Which type of casting process is commonly used for precision equipment and complex geometries?

• Centrifugal casting

• Permanent mold casting

• Investment casting

• Die casting

What is the main disadvantage of investment casting?

• Good surface finish

• Low cost

• High production rate

• Many processing steps required

Which type of mold casting process uses a metal mold constructed of two sections designed for easy opening and closing?

• Die casting

• Investment casting

• Permanent mold casting

• Centrifugal casting

What is the defect called when a casting has solidified before completely filling the mold cavity?

• Cold Shut

• Misruns

• Shrinkage Cavity

• Microporosity

Which type of furnace uses a continuous flow of iron emerging from the bottom of the furnace?

• Cupola Furnace

• Electric-arc Furnace

• Direct Fuel-fired furnace

• Induction Furnace

What is the main advantage of die casting?

• Thin sections possible

• High production rate

• Good dimensional accuracy

• Economical