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Engineering materials
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ Steel made from phosphatic iron is brittle [other wrong options] [Discuss in forum] hard ductile tough malleable. |
Q2 ⇒ Grey cast iron has. carbon in the form of free graphite [other wrong options] [Discuss in forum] high tensile strength low compressive strength all of these |
Q3 ⇒ Ductile cast iron is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material [other wrong options] [Discuss in forum] contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable is produced by annealing process. It is soft, tough and easily machined metal none of the above. |
Q4 ⇒ The property of a material essential for spring materials is. resilience [other wrong options] [Discuss in forum] stiffness ductility plasticity |
Q5 ⇒ Brass contains 70% copper and 30% zinc [other wrong options] [Discuss in forum] 90% copper and 10% tin 85-92% copper and rest tin with little lead and nickel 70-75% copper and rest tin 70% copper and 30% tin. |
Q6 ⇒ Specify the sequence correctly. Stress relief, recrystallisation, grain growth [other wrong options] [Discuss in forum] Grain growth, recrystallisation, stress relief Stress relief, grain growth, recrystallisation Grain growth, stress relief, recrystallisation |
Q7 ⇒ Monel metal is an alloy of. nickel and copper [other wrong options] [Discuss in forum] nickel and copper nickel, chromium and iron copper and chromium |
Q8 ⇒ The crystal structure of brass is F.C.C. [other wrong options] [Discuss in forum] B.C.C. H.C.P. Orthorhombic crystalline structure none of the above. |
Q9 ⇒ The percentage of carbon in cast iron varies from. 1.7 to 4.5 [other wrong options] [Discuss in forum] 0.1 to 0.5 0.5 to 1 1 to 1.7 |
Q10 ⇒ The toughness of a material __________ when it is heated. decreases [other wrong options] [Discuss in forum] remains same increases none of these |
Q11 ⇒ The composition of silver solder is silver, copper, zinc [other wrong options] [Discuss in forum] silver, tin, nickel silver, lead, zinc silver, copper, aluminium silver, lead, tin. |
Q12 ⇒ When the steel is normalised, its all of these [other wrong options] [Discuss in forum] yield point increases ductility decreases ultimate tensile strength increases |
Q13 ⇒ The charge of the blast furnace consists of. calcined ore (8 parts ), coke (4 parts) and limestone (1 part) [other wrong options] [Discuss in forum] calcined ore (4 parts), coke (1 part) and limestone (8 parts) calcined ore (1 part), coke (8 part) and limestone (4 parts) calcined ore, coke and limestone all in equal parts |
Q14 ⇒ Which one of the following metals would work-harden more quickly than the others? brass [other wrong options] [Discuss in forum] copper lead silver aluminium. |
Q15 ⇒ Cast iron is manufactured in. cupola [other wrong options] [Discuss in forum] blast furnace open hearth furnace bessemer converter |
Q16 ⇒ In basic bessemer process, the furnace is lined with. a mixture of tar and burnt dolomite bricks [other wrong options] [Discuss in forum] silica bricks either (a) or (b) none of these |
Q17 ⇒ A specimen of aluminium metal when observed under microscope shows F.C.C. crystal structure [other wrong options] [Discuss in forum] B.C.C. crystalline structure H.C.P. structure a complex cubic structure orthorhombic crystalline structure. |
Q18 ⇒ The heat treatment process used for softening hardened steel is. tempering [other wrong options] [Discuss in forum] carburising normalising annealing |
Q19 ⇒ A steel containing ferrite and pearlite is. soft [other wrong options] [Discuss in forum] hard tough hard and tough |
Q20 ⇒ The usual composition of a soldering alloy is tin, lead and small percentage of an-timony [other wrong options] [Discuss in forum] tin and lead tin, lead and silver tin and copper tin, copper and lead. |
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