When a strip made of iron and copper is heated

Related MCQs

• A steel strip is welded to a copper strip of the same dimensions along the length. The coefficient of thermal expansion for copper is greater than that for steel. If temperature is increased, ___ .
• If a composite bar of steel and copper is heated, then the copper bar will be under
• A bar of copper and steel form a composite system, which is heated to a temperature of 40?C. The stress induced in the copper bar will be
• A bar of copper form a composite system, which is heated to a temperature of 45?C. The stress in the copper bar will be
• A strip of steel (E = 200 GPa, 0.25) has a length of 1 m, width of 200 mm and thickness of 10 mm. A line of length 1 m is drawn parallel to its length on one of its side surfaces. When the strip is subjected to an axial tensile force of 100 kN, the length of the line will be                  mm.
• A copper rod 15 mm diameter 0.8 m long is heated through 50?C. The expansion of the rod is prevented by gripping it at both ends. When the grips do not yield, the stress in rod is 115 N/mm2 and forces applied at the grips are 20 kN. In case one of the grip yields by 0.5 mm
• A load of 10,000 kg is applied to copper cylinder 20 cm long and 5 cm in diameter causes the length to increase by 4 mm and diameter to decrease by 0.4 mm. The Poisson's ratio for copper would be
• The numerical value of Young's modulus of elasticity in ascending order for glass, aluminium, copper, wrought iron and tungsten are given by
• A brittle steel rod is heated to 160?C and then suddenly clamped at both ends. It is then allowed to cool and breaks at a temperature of 85?C. If E = 200 GN/m2 and ? = 12 x 10-5 / ?C, the breaking stress of steel is
• A strip of steel 75 mm wide 40 mm thick is bent round a circular drum of 4.96 m outside diameter. If E = 2 x 105 N/mm2, the maximum stress due to bending will be