Question 1

When forming "Z" sections, the product is twisted in the opposite direction to compensate the machine generated twist.

Accepted Answer

The process of forming "Z" sections involves twisting the product in the opposite direction to counteract any twist introduced by the machinery, ensuring the final product maintains the desired shape and alignment.

Question 2

Which of the following is a type of extrusion process?

Accepted Answer

All of the mentioned are types of extrusion processes.

Question 3

In direct extrusion process at higher temperature which of the following is used to avoid friction?

Accepted Answer

In direct extrusion processes at higher temperatures, molten glasses are often used to avoid friction. This is because molten glasses can act as a lubricant at high temperatures, reducing friction between the die and the material being extruded.

Question 4

In which of the following process frictional loss is eliminated at the billet container interface?

Accepted Answer

In the hydrostatic extrusion process, the billet is completely surrounded by a pressurized liquid, which eliminates the frictional loss at the billet-container interface. This is because the liquid acts as a lubricant, allowing the billet to move smoothly without direct contact with the container walls.

Question 5

In which of the following process fluid medium is used to apply the load on the billet?

Accepted Answer

In the hydrostatic process, a fluid medium is used to apply pressure uniformly on the billet, allowing for deformation.

Question 6

Extrusion is similar to?

Accepted Answer

Extrusion is a process in which a metal billet is forced through a die to produce a desired shape. Rolling is a similar process in which a metal sheet is passed between two rollers to reduce its thickness.

Question 7

Which defect arises due to high friction or high speed?

Accepted Answer

Tearing and surface cracking can arise due to high friction or high speed during manufacturing processes, as both conditions can lead to excessive heat and stress on the material's surface.

Question 8

Which of the following defect is also known as bamboo defect?

Accepted Answer

The answer of Which of the following defect is also...

Question 9

Which of the following defect tends to draw surface oxides and impurities towards the centre of billet?

Accepted Answer

Pipe defect is known for drawing surface oxides and impurities towards the center of the billet during solidification, as the center solidifies last and undergoes shrinkage, creating a cavity that can draw in impurities.

Question 10

Which of the following defect is also known as fish tailing?

Accepted Answer

Pipe defect, also known as fish tailing, occurs when gases trapped during the solidification process of metals form cavities or hollow spaces within the material.

Question 11

For proper stretching operation, the metal sheet should be stressed above its yield strength.

Accepted Answer

Stretching a metal sheet above its yield strength allows it to plastically deform, ensuring that the stretching operation effectively reshapes the material without it springing back to its original form.

Question 12

In stretch forming, forming limit curve (FLC) is defined as a locus of all the limit strains in different strain paths of the sheet metal.

Accepted Answer

The Forming Limit Curve (FLC) is indeed defined as the boundary curve that delineates the limit strains for different strain paths that sheet metal can undergo before the onset of necking or failure, making it a crucial tool in analyzing and predicting the formability of sheet metal in stretch forming processes.

Question 13

The stretch forming process is generally performed by using a hydraulic operated ram.

Accepted Answer

Stretch forming is typically performed using a hydraulic-operated ram to stretch the metal sheet or extrusion over a form block, which shapes the metal to the desired contour.

Question 14

Rubber forming is a type of forming process in which polyurethane is used as a die material.

Accepted Answer

In rubber forming, a flexible material such as polyurethane, which is a type of rubber, is used as a die material to form metal sheets into specific shapes. This process allows for the creation of complex parts without damaging the metal surface.

Question 15

The metal forging operation can only be performed by manual means.

Accepted Answer

Metal forging can be performed using both manual means (such as with a hammer and anvil) and automated machinery (such as mechanical or hydraulic presses), allowing for a wide range of techniques and precision.

Question 16

Which of the following metal forming processes performs squeezing out of material through a hole?

Accepted Answer

Extrusion is the process where material is forced through a die or an opening to create long objects of a fixed cross-section.

Question 17

Metal forming is a process in which the metal is deformed plastically to get into the desired shape.

Accepted Answer

Metal forming involves deforming metal plastically under the action of external forces to achieve a desired shape, without removing any material.

Question 18

Which of the following processes is not the type of bulk forming process in the metal forming?

Accepted Answer

Bending is not considered a bulk forming process because it primarily involves the deformation of metal along a straight line, affecting the metal's shape rather than its volume or mass. Bulk forming processes, such as rolling, forging, and extrusion, involve significant deformation and shaping of large volumes of metal, impacting the material's bulk properties.

Question 19

Which of the following manufacturing processes is mainly considered for producing the components of very high strength?

Accepted Answer

Forging is a manufacturing process that involves shaping metal using localized compressive forces, often resulting in components with very high strength due to the refined grain structure and work hardening.

Question 20

In metal forging process, the gravity drop hammers are operated by a ram using steam or pressurized air.

Accepted Answer

The answer of In metal forging process, the gravity drop...

Quiz 7: Metal Forming Processes and Techniques