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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