Q1: The single most imortant requirement for a turbine blade material is

ANS:C - creep resistaned

The single most important requirement for a turbine blade material is creep resistance. Turbine blades operate under extremely high temperatures and stresses in gas turbines or steam turbines. Creep is the gradual deformation of a material under prolonged exposure to high temperatures and mechanical stresses. In turbine applications, where blades are subjected to high temperatures and centrifugal forces, creep resistance is crucial to ensure the long-term structural integrity and reliability of the turbine blades. Creep-resistant materials can withstand these high temperatures and stresses without undergoing significant deformation over time. Materials with high creep resistance maintain their shape and structural integrity, allowing turbine blades to operate efficiently and reliably over extended periods without failure. While other properties such as damping, resilience, and the ductile-to-brittle transition temperature (DBTT) are also important in turbine blade materials, creep resistance stands out as the single most critical requirement due to the extreme operating conditions experienced by turbine blades.