METAL FORMING

A esta ecuación se le conoce como

• Prandtl Reuss equation

• Levy Von Misses

• Modulus of resilience

• Modulus of toughness

Which of the following type of force is applied for stretch forming process?

• Indirect compression type of force

• Direct compression type force

• Tension type of force

• Shearing type of force

Total stress acting on a body is the

• Multiplication of normal and shearing stress of the body

• Division of normal and shearing stress of the body

• Summation of normal and shearing stress of the body

• Subtraction of normal and shearing stress of the body

Which of the following type of force is applied for sheet metal forming applications?

• Indirect compression type of force

• Direct compression type force

• Tension type of force

• Shearing type of force

Which of the following statement is true for continuous body?

•   Identical properties obtained at all points

• Property does not vary with direction or orientation

• Do not contain voids/spaces of any kind.

• None of these

Which of the following statements is true for isotropic material?

• Identical properties obtained at all points

• Property does not vary with direction or orientation

• Do not contain voids/spaces of any kind

• None of these

Which of the following statement is/are correct for metal forming process?

(i)     Metal forming processes are used for plastically deforming workpiece to desire shape and obtaining optimum mechanical properties.

(ii)    In plastic deformation, the deformation is permanent in nature

• a.        Only i

• a.        Only ii

• a.        Both i and ii

• a.        None of these

Which of the following statement is/are correct for strain hardening process?

(i)                    Strain hardening is a cold working process

(ii)                   Due to strain hardening ductility of material will increase

• Only i

• Only ii

• Both i and ii

• None of these

Which of the following statement is/are correct for hot working process?

(i)     In case of hot working process metal is heated below the recrystallization temperature.

(ii)    Surface finish and tolerances are inferior to cold working process because of surface reactions (oxidation scale etc.)

(iii)   Deformation forces are low

• a.        i and ii only

• a.        i and iii only

• a.        ii and iii only

• a.        i, ii and iii

09 Which of the following statement is/are correct for cold working process?

(i)     Strain hardening effects predominate over thermal recovery effects.

(ii)    In cold working process the strength and hardeness of the material will decrease.

(iii)   It results in an elongates grain structure and can be used to harden metals and alloys that do not respond to heat treatment.

(iv)   Surface finish and tolerances can not closely obtain

• a.        i and ii only

• a.        i and iii only

• a.        ii and iii only

• a.        i, ii and iii