Q1: __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.

ANS:A - Tensile

The test that determines the yield strength, Young's modulus of elasticity, percentage reduction in area, and percentage elongation of a material is called the Tensile test. Explanation:

1. Tensile test: The tensile test, also known as the tension test, is a fundamental mechanical test used to evaluate the mechanical properties of materials under tensile loading. In this test, a standardized specimen of the material is subjected to a gradually increasing tensile load until it fractures. During the test, various mechanical properties are measured or calculated, including:
   • Yield strength: The stress at which the material begins to deform plastically.
   • Young's modulus of elasticity: A measure of the stiffness or rigidity of the material.
   • Percentage reduction in area: The decrease in cross-sectional area of the specimen at the point of fracture compared to the original area.
   • Percentage elongation: The increase in length of the specimen at the point of fracture compared to the original length. The tensile test provides valuable information about the behavior of materials under tensile loading and is widely used in materials science, engineering, and quality control.
2. Fatigue test: The fatigue test is used to assess the behavior of materials under cyclic loading conditions, typically at high frequencies and relatively low stresses. It is used to determine the fatigue strength and fatigue life of materials, particularly metals and alloys subjected to repeated loading and unloading cycles.
3. Impact test: The impact test evaluates the toughness or impact resistance of materials by subjecting them to a sudden and intense force or shock. It is commonly used to assess the behavior of materials under dynamic loading conditions, such as in situations involving impact or collision.