51. Carbon in steel A. increases strength B. increases hardness C. decreases toughness D. all of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
52. Post weld heat treatment of martensitic stainless steel weld joint is mandatory if it has carbon content A. Less than 0.1% B. More than 0.1% C. Less than 0.2% D. More than 0.2% Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
53. Electromagnetic stirring of the liquid steel in continuous casting is primarily used to A. decrease the extent of growth of columnar grains B. improve the surface quality of steel slab C. minimise the internal cracks in steel slab D. increase the rate of solidfication of steel Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
54. Stainless steels are A. low alloy steels B. high alloy steels C. low carbon steels D. high carbon steels Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
55. Necessary conditions for removal of phosphorous from liquid steel are A. high temperature, high viscosity, low FeO content of slag B. low temperature, high viscosity, high FeO content of slag C. low temperature, low viscosity, and low FeO content of slag D. high temperature, low viscosity, and high FeO content of slag Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
56. The main function of the RH process of steel treatment is to A. reduce dissolve nitrogen in steel B. improve ferro alloy recovery C. reduce sulfur in steel D. reduce carbon and hydrogen in steel Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
57. Chromium-silicon Heat resisting steels are also known as A. Valve steels B. Carbon steels C. Alloy steels D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
58. Air hardening steels are basically A. Carbon-manganese-molybdenum steels B. Chromium-manganese-molybdenum steels C. Nickel-boron-molybdenum steels D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
59. Cold shortness happens in the steel due to presence of A. phosphorous B. carbon C. Sulphur D. Silicon Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
60. Thin section having thickness lesser than 6mm & width greater than 600mm is called A. plate B. sheet C. strip D. slab Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
