Ultimate tensile strength MCQ Questions - Mechanical Behaviour & Testing of Materials

Explanation: Ultimate tensile strength (UTS), often shortened to tensile strength (TS), ultimate strength, or within equations, is the maximum stress that a material can withstand while being stretched or pulled before breaking.

Explanation: Some materials break very sharply, without plastic deformation, called a brittle failure

Explanation: True, Tensile strength is defined as a stress, which is measured as force per unit area

Explanation: Tensile strength of brass is 550 MPa. 220 MPa is UTS (ultimate tensile strength) for 99.9% copper. 350 MPa is UTS for cupronickel (10% Ni) and 760 MPa is UTS for high strength alloy steel.

Explanation: The SI unit of ultimate tensile strength is N/m^2 or Pascal with large numbers being expressed in megapascals.

Explanation: The ability of the material to withstand uniaxial tensile force is known as tensile strength. While the minimum applied stress, which causes permanent deformation, is yield strength. Ability to withstand compressive force without breaking is the compressive strength.

Explanation: As the percent of cold working increases, UTS of materials increases. It is due to an increase in dislocation density and their interaction with imperfections. Cold working is therefore an effective strengthening mechanism for single phase materials.

Explanation: The ultimate tensile strength of a material is an intensive property; therefore its value does not depend on the size of the test specimen.

Explanation: With an increase in temperature, UTS of material decreases. The reason is softning of material which leads to easy movement of dislocations. On other hands, cold working, alloying and grain refinement increases UTS by producing strains in a material.

Explanation: Tensile strength of Aluminium alloy 483 .