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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 ⇒ To improve the machinability of steel by its softening, it is subjected to annealing [other wrong options] [Discuss in forum] ![]() ![]() cold working shot blasting heating |
Q2 ⇒ The hardest material just prior to diamond in Mho's scale is corrundum [other wrong options] [Discuss in forum] ![]() ![]() topax carborundum calcite |
Q3 ⇒ __________ is used for determining the tensile strength of steels. Universal testing machine [other wrong options] [Discuss in forum] ![]() ![]() Hydraulic press Mechanical press none of these |
Q4 ⇒ 18/8 steel is a/an __________ stainless steel. austenitic [other wrong options] [Discuss in forum] ![]() ![]() ferritic martensitic none of these |
Q5 ⇒ Lead lined equipments & vessels are suitable for handling sulphuric acid upto 60°C. [other wrong options] [Discuss in forum] ![]() ![]() hydrochloric acid (10%). nitric acid. all (a), (b) and (c). |
Q6 ⇒ The metals occuring at the lower most position in the electromotive series resist corrosion very strongly. [other wrong options] [Discuss in forum] ![]() ![]() do not resist corrosion. are very brittle. are heat insulators. |
Q7 ⇒ __________ iron is produced, when molten pig iron is allowed to cool gradually. Grey cast [other wrong options] [Discuss in forum] ![]() ![]() White cast Wrought none of these |
Q8 ⇒ Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets. cobalt [other wrong options] [Discuss in forum] ![]() ![]() chromium nickel tungsten |
Q9 ⇒ Liners of a ball mill are never made of lead [other wrong options] [Discuss in forum] ![]() ![]() alloy steel rubber or ceramic material cast iron |
Q10 ⇒ Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of rubber lined mild steel [other wrong options] [Discuss in forum] ![]() ![]() lead lined mild steel aluminium cast iron |
Q11 ⇒ Bell metal is an alloy of copper & tin [other wrong options] [Discuss in forum] ![]() ![]() copper & zinc copper & nickel zinc & tin |
Q12 ⇒ Which of the following mechanical properties of a material is most structure insensitive ? Modulus of elasticity (young's modulus). [other wrong options] [Discuss in forum] ![]() ![]() Toughness. Percentage reduction of area. Tensile strength. |
Q13 ⇒ Hastelloy comprises of molybdenum and nickel [other wrong options] [Discuss in forum] ![]() ![]() copper and tin copper and nickel lead and tin |
Q14 ⇒ The fermentor used for the production of ethyl alcohol from molasses is made of copper bearing steel [other wrong options] [Discuss in forum] ![]() ![]() wood concrete procelain |
Q15 ⇒ An alloy of iron containing 4% carbon is called none of these [other wrong options] [Discuss in forum] ![]() ![]() high carbon steel wrought iron mild steel |
Q16 ⇒ Which of the following is not a copper based alloy with nickel ? Inconel [other wrong options] [Discuss in forum] ![]() ![]() German silver Monel metal Constantan |
Q17 ⇒ Graphite is corroded by none of these [other wrong options] [Discuss in forum] ![]() ![]() sulphuric acid (10%) sea water hydrochloric acid |
Q18 ⇒ Addition of 2% nickel in steel makes it suitable for making boiler plates, rivets etc. [other wrong options] [Discuss in forum] ![]() ![]() electronic valves turbine blades connecting rod |
Q19 ⇒ Cast iron compared to steel is better in fluidity & castability [other wrong options] [Discuss in forum] ![]() ![]() ductility strength malleability |
Q20 ⇒ Wrought iron is a suitable material of construction for handling __________ solutions. alkalis & alkaline [other wrong options] [Discuss in forum] ![]() ![]() dilute acidic concentrated acidic none of these |
Or |