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Engineering MaterialsExplain the Rockwell hardness test and compare B-scale with C-scale.20246mEngineering MaterialsChoose the correct option: In a standard tensile test on a ductile metal, Young's modulus is obtained from: (i) The entire stress-strain curve up to fracture (ii) The slope of the initial linear portion of the engineering stress-strain curve (iii) The maximum load divided by original area (iv) The slope of the plastic region of the true stress-strain curve20252mEngineering MaterialsChoose the correct option: Which of the following is the hardest? (i) Austenite (ii) Bainite (iii) Pearlite (iv) Martensite20242mEngineering MaterialsChoose the correct option: The ability of a material to resist plastic deformation is known as (i) Tensile Strength (ii) Modulus of Elasticity (iii) Yield Strength (iv) Impact Strength20242m
PreviousChoose the correct option: In a standard tensile test on a ductile metal, Young's modulus is obtained from: (i) The entire stress-strain curve up to fracture (ii) The slope of the initial linear portion of the engineering stress-strain curve (iii) The maximum load divided by original area (iv) The slope of the plastic region of the true stress-strain curveNextChoose the correct option: The main purpose of normalising a hypoeutectoid steel is to: (i) Produce very soft coarse pearlite for maximum ductility only (ii) Refine grain size and produce uniform fine pearlite for improved strength and toughness (iii) Form martensite for maximum hardness (iv) Produce spheroidised cementite for easy machining