Question

Spring back during the sheet metal operation is caused because of the

	a.	Excess energy that was utilized during the forming process
	b.	Release of the stored energy during the elastic deformation
	c.	Release of the stored energy during the plastic deformation
	d.	Release of the stored energy during the elastic and plastic deformation

Compared to brittle materials ductile materials require for shearing operation

	a.	Clearance based on material thickness only
	b.	Higher clearances
	c.	Same clearance
	d.	Lower clearances

In a blanking die, to reduce the possibility of slug clinging to the die, the following provision is made

	a.	Shear on the die
	b.	Angular clearance in the die
	c.	Shear on the punch
	d.	Cutting land on the die

Find the correct statement below:

	a.	The clearance in a piercing die applied on the punch while in a blanking die it is applied on the die.
	b.	The clearance in a piercing die applied on the die while in a blanking die it is applied on the punch.
	c.	The clearance in a piercing die applied on the punch while in a blanking die it is applied on the punch.
	d.	The clearance in a piercing die applied on the die while in a blanking die it is applied on the die.

Answer 1