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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. |
Q41 ⇒ The material of construction of pressure mills used for squeezing out the juice from sugar cane is cast iron [other wrong options] [Discuss in forum] stainless steel mild steel monel |
Q42 ⇒ Steel balls for ball bearings are generally made of __________ steel. carbon chrome [other wrong options] [Discuss in forum] cast stainless free carbon |
Q43 ⇒ A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds. 5 [other wrong options] [Discuss in forum] 100 250 500 |
Q44 ⇒ Pick out the wrong statement both (b) and (c) [other wrong options] [Discuss in forum] Hardening makes the steel more brittle. High alloy steels contain more than 50% alloying element. 18/8 stainless steel is a magnetic steel. |
Q45 ⇒ The softest material just next to talc in the Mho's scale is gypsum [other wrong options] [Discuss in forum] quartz feldspar fluorite |
Q46 ⇒ Silicon percentage in iron castings to have maximum hardness should be about 0.8 [other wrong options] [Discuss in forum] 0.3 0.5 2.5 |
Q47 ⇒ The addition of antimony in tin-based alloys improves its deformation resistance. [other wrong options] [Discuss in forum] rupture strength and hot hardness. impact strength and bonding strength. wear resistance. |
Q48 ⇒ The most distinguished property of malleable cast iron is its high ductility [other wrong options] [Discuss in forum] hardness malleability none of these |
Q49 ⇒ Presence of nickel in steel improves its corrosion resistance. [other wrong options] [Discuss in forum] cutting ability. wear resistance. all (a), (b) and (c). |
Q50 ⇒ 'Hypersil' is a __________ steel. silicon [other wrong options] [Discuss in forum] high speed molybdenum tungsten |
Q51 ⇒ Which of the following stainless steels is non-magnetic ? Austenitic [other wrong options] [Discuss in forum] Ferritic Martensitic None of these |
Q52 ⇒ A material is able to retain the deformation permanently by virtue of its plasticity [other wrong options] [Discuss in forum] elasticity ductility malleability |
Q53 ⇒ Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese. 43083 [other wrong options] [Discuss in forum] 1.5-2 3.5-4.5 42925 |
Q54 ⇒ __________ alloys have the highest specific strength of all the structural materials out of the following. Titanium [other wrong options] [Discuss in forum] Magnetic steel Chromium Magnesium |
Q55 ⇒ Addition of __________ in steel can help in increasing the depth of hardness. tungsten [other wrong options] [Discuss in forum] nickel chromium vanadium |
Q56 ⇒ Which of the following is the most elastic material ? Steel [other wrong options] [Discuss in forum] Plastic Glass Rubber |
Q57 ⇒ Ceramic recuperators are generally made of silicon carbide. [other wrong options] [Discuss in forum] calcium carbide. fireclay bricks. high alumina bricks. |
Q58 ⇒ Interchain forces are the weakest in case of both rubber & elastomers [other wrong options] [Discuss in forum] plastics fibres elastomers |
Q59 ⇒ Most suitable material for high pressure vessel operating at 500 atm. and 500° C is molybdenum stainless steel. [other wrong options] [Discuss in forum] 18/8 stainless steel. mild steel. high silicon iron (14% Si). |
Q60 ⇒ Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by acetic acid [other wrong options] [Discuss in forum] dilute HCI concentrated H2SO4 none of these |
Or |