Answer: Option C. -> Point defect
Point defects are where an atom is missing or is in an irregular place in the lattice structure.
Point defects include self interstitial atoms, interstitial impurity atoms, substitutional atoms and vacancies

Answer: Option A. -> Nichrome
The most common usage of nichrome is as resistance wire, although they are also used in some dental restorations (fillings) and in a few other applications

Answer: Option A. -> Mild steel
Mild steel has maximum ductility.
Those materials show the lower amount of the carbon.
Alloying elements from one metal to another metal.
Some materials can have the inherent ability to withstand when the tensile load has been applied pave of the materials like low carbon steels and medium carbon steel shows somehow desirables properties like ductility.

Answer: Option C. -> Hot hardness
hot hardness or red hardness corresponds to hardness of a material at high temperatures.
As the temperature of material increases, hardness decreases and at some point a drastic change in hardness occurs

Answer: Option B. -> Externally applied forces with breakdown or yielding
The Strength of the material is defined as the quality or state of being physically strong, the capacity of an object or substance to withstand great force or pressure

Answer: Option D. -> All of these
Annealing of steels Increased cold shaping possibilities because intermediate annealing can be utilized to improve the forming properties after the material is compressed during other operations such as cold heading.
Annealing of steels Reduced chance of distortion during secondary operations such as machining.
Annealing of steels Controlled atmosphere annealing decreases the chance of oxidation to annealed parts.
Annealing of steels Improved reaction time and greater control of emergency product need fulfillment.

Answer: Option D. -> Anisotropic
Anisotropy, is the property of being directionally dependent, which implies different properties in different directions, as opposed to isotropy.

Answer: Option C. -> More than
Iron-carbon alloys containing carbon more than 4.3% are known as hyper-eutectic cast irons.
hypereutectic cast iron (>4.3 % C).

Answer: Option B. -> Chromium
Most stainless steel contains about 18 percent chromium; it is what hardens and toughens steel and increases its resistance to corrosion, especially at high temperatures

Answer: Option A. -> Chromium and nickel
Nickel (Ni): Nickel is added in large amounts, over about 8%, to high Chromium stainless steels to form the most important class of corrosion and heat resisting steels.