This set of Mechanical Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on “Brittle Fracture and Impact Testing – Instrumented Charpy Test”. 1. Which of the following is not among the basic condition responsible for causing the fracture of brittle? a) A triaxle state of stress b) Low temperature c) High strain rate d) Large … Read more
This set of Mechanical Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on “Creep & Stress Rupture – Super Plasticity”. 1. As the temperature increases in polycrystalline metal, the nature of fracture change from _____________ to __________ a) intergranular, transgranular b) transgranular, intergranular c) tuctile, brittle d) creep, fatigue 2. The equicohesive temperature is defined … Read more
This set of Mechanical Metallurgy Questions & Answers for Exams focuses on “Creep & Stress Rupture – Creep Deformation Mechanism – 2”. 1. The following creep map is plotted with homologous stress and temperature, as shown in the region. The coble creep region is shown by region ________ a) I b) II c) III d) … Read more
This set of Mechanical Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on “Creep & Stress Rupture – Creep Deformation Mechanism – 1”. 1. In a material, if several mechanisms are operating in parallel to creep the material, then the creep rate will be decided by the __________ a) slowest operating mechanism b) fastest operating … Read more
This set of Mechanical Metallurgy Objective Questions & Answers focuses on “Stress-Rupture Test – 2”. 1. The material with low stacking fault energy is prone to sub-grain formation compared to the metal with high stacking fault energy. a) True b) False 2. The grain boundary sliding is a shear process occurring along the ________ a) … Read more
This set of Mechanical Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on “Stress-Rupture Test – 1”. 1. Typically the creep rate is measured in which unit? a) Length/minutes b) Load/length c) Percentage change of length/hour d) Percentage change of length/percentage change of time 2. The creep test and the stress-rupture test are the same … Read more
This set of Mechanical Metallurgy Questions and Answers for Aptitude test focuses on “Creep Curve – 2”. 1. The idealized shape of the creep curve is given by _________ (at constant load state) a) b) c) d) 2. The idealised shape of the creep curve is given by _________ (at constant stress state) a) b) … Read more
This set of Mechanical Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on “Creep Curve – 1”. 1. The thermo-elastic behavior is the only cause of anelastic effect and the elastic hysteresis loop on stress-strain curve. a) True b) False 2. In the polymers, the energy dissipation and the anelastic behavior is caused by _________ … Read more
This set of Mechanical Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on “Creep & Stress Rupture – High Temperature Material Problem”. 1. The equilibrium number of vacancy in a crystal lattice ____________ with increasing temperature. a) increases b) decreases c) remains constant d) no relationship 2. At an elevated temperature, the material behaves as … Read more
This set of Mechanical Metallurgy written test Questions & Answers focuses on “Fatigue of Metals – Machine Design Approach – 2”. 1. The corrosion fatigue is defined as the _________ a) chemical attack b) stress c) cycle stress d) chemical attack and cycle stress 2. Which one of the following is only present in the … Read more
