Mechanical Engineering : Engineering Materials QUESTIONS AND ANSWERS :: part3 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.Annealing of white cast iron results in production of |
| malleable iron |
| nodular iron |
| spheroidal iron |
| grey iron |
| none of the above. |
7.'Killed steels' are those steels |
| which are destroyed by burning^ |
| which after their destruction are recycled to produce fresh steel |
| which are deoxidised in the ladle with silicon and aluminium |
| in which carbon is completely burnt |
| which have poor properties due to im�proper manufacturing. |
8.By severely deforming a metal in a particular direction it becomes |
| ductile |
| malleable |
| homogeneous |
| isotropic |
| anisotropic. |
9.Pick up the wrong statement |
| aluminum in steel results in excessive grain growth |
| manganese in steel induces hardness |
| nickel and chromium in steel help in raising the elastic limit and improve the resilience and ductility |
| tungsten in steels improves magnetic properties and harden ability |
| sulphur, phosphorous and lead improve machining properties of steel. |
10.Inconel is an alloy of |
| nickel, chromium and iron |
| nickel, copper |
| nickel, chromium |
| nickel, zinc |
| nickel, lead. |
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