Manufacturing Quiz_2

Which of the following material properties refers to a material's ability to deform under tensile stress without fracturing?

• Toughness

• Stiffness

• Ductility

• Hardness

The ability of a material to absorb energy and deform plastically without fracturing is known as:

• Hardness

• Toughness

• Creep

• Malleability

Which material property is characterized by the gradual deformation of a material under constant stress over time?

• Creep

• 
  Malleability

• Hardness

• Toughness

Which of the following statements about material properties is/are correct?

1. (a) Ductility is the ability of a material to resist deformation under compressive stress.

2. (b) Toughness is the measure of a material's ability to absorb energy before fracturing.

3. (c) Creep refers to the gradual permanent deformation of a material under constant stress over the time.

4. (d) Brittleness describes a material's ability to deform plastically before fracturing.

• only one is correct

• only two are correct

• all are correct

• None of the all

Which of the following best describes the role of coke in a cupola furnace?

• Acts as a flux to remove impurities.

• Provides the necessary heat by burning as fuel.

• Serves as the metal charge for melting.

• Acts as a refractory lining to protect the furnace.

Which of the following statements is/are correct about gray cast iron?

A) It contains graphite in the form of flakes, which gives it good machinability and vibration damping properties.
B) It is characterized by the presence of cementite, making it very hard and brittle.
C) Gray cast iron is primarily used in applications requiring high tensile strength and ductility.
D) It has a white fracture surface due to the presence of carbon in the form of carbide.

• Only one is correct

• Only two are correct

• All are correct

• none is correct

Which impurity is added to steel to improve its corrosion resistance?

• Chromium

• Sulfur

• Cobalt

• Manganese

In sand casting, what is the main purpose of the core?

• To act as a mold for the metal

• To provide strength to the mold

• To create internal cavities within the cast part

• To improve the surface finish of the cast part

Which sand property is crucial for ensuring that gases produced during metal pouring can escape without causing defects in the casting?

• Permeability

• Green strength

• Both

• None

What is the term used to describe the ability of molding sand to withstand the high temperatures of molten metal?

• Permeability

• Strength
  

• Refractoriness

• None