Chemical Engineering Basics Which of the following is not a characteristic observed in material failure by fatigue fracture ? Initiation of crack from below the surface does not occur Initation of crack occurs on the surface of the machine part Plastic deformation of material does not occur Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface Initiation of crack from below the surface does not occur Initation of crack occurs on the surface of the machine part Plastic deformation of material does not occur Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ? Mandrels, twist drills, small lathe tools and razors Small punches, broaches reamers and springs Forgings like can shaft, structural steel plate, threading dies and drawing dies Cutlery, screws, rivets and files Mandrels, twist drills, small lathe tools and razors Small punches, broaches reamers and springs Forgings like can shaft, structural steel plate, threading dies and drawing dies Cutlery, screws, rivets and files ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Eutectoid reaction for iron-carbon system occurs at a temperature of __________ °C. 1493 1147 597 959 1493 1147 597 959 ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void. Less than Greater than Either A, B or C; depends on the size of atom Equal to Less than Greater than Either A, B or C; depends on the size of atom Equal to ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent. 300 200 150 400 300 200 150 400 ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics The phenomenon of strain-ageing is generally experienced with Cast iron High carbon steel High manganese steel Low carbon steel Cast iron High carbon steel High manganese steel Low carbon steel ANSWER DOWNLOAD EXAMIANS APP
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