131. Thermoplastic materials are those materials which
132. Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio
133. Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio
134. Heavy duty leaf and coil springs contain carbon of the following order
135. Cold rolled steel sheets contain carbon of the following order
136. In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled
137. Steel containing ferrite and pearlite is
138. Ductile cast iron
139. Which of the following steel making process is being adopted at Rourkela (in India) Steel Plant?
140. Quenching is not necessary when hardening is done by
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