Which of the following is not the correct method of increasing fatigue limit __________________? A. shot peening B. nitriding of surface C. cold workingD. surface decarburisation E. under-stressing

Which of the following pipes is least corrosion resistant__________________? A. brass B. mild steel C. cast ironD. wrought iron E. copper

High carbon steel carries carbon %age c_________________? A. 0.1 to 0.3% B. 0.3 to 0.6% C. 0.6 to 0.8%D. 0.8 to 1.5% E. 1.5 to 2.5%.

The percentage of carbon in low carbon steel is__________________? A. 0.05%B. 0.15% C. 0.3% D. 0.5% E. 0.7%.

Grey cast iron_____________________? A. contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron B. is also known as chilled cast iron am is obtained by cooling rapidly. It i: almost…

Nickel in steel___________________? A. improves wear resistance, cutting ability and toughness B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant proper¬ties C. improves cutting ability and reduces hardenabilityD. gives ductility, toughness, tensile strength and…

The presence of sulphur in pig iron makes__________________? A. it easily machinable B. it brittle C. it hardD. the casting unsound E. increases the fluidity

Compressive strength of grey cast iron in tonnes/cm is of the order of___________________? A. 3- 5B. 5-7 C. 7-10 D. 10-15 E. 15-22

Cupola produces following material__________________? A. cast iron B. pig iron C. wrought iron D. malleable iron E. white iron

The following element can’t impart high strength at elevated temperature__________________? A. manganeseB. magnesium C. nickel D. silicon E. none of the above