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Antonym of DUCTILE is-
A Docile
B Pliable
C Stiff
D Supple
Plastic flow in ductile materials
A Increases the seriousness of static loading stress concentration
B Lessens the seriousness of static loading stress concentration
C Has no effect on it
D Depends on other considerations
Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?
A Sulphur
B Phosphorus
C Manganese
D Silicon
The following types of materials are usually the most ductile
A Face centered cubic lattice
B Body centered cubic lattice
C Hexagonal close packed lattice
D All of the above
The ductile materials, during machining, produce
A Continuous chips
B Discontinuous chips
C Continuous chips with built up edge
D Either (A) or (C)
Materials having __________ lattice structure are usually the most ductile.
A Body centred cubic (bcc)
B Hexagonal close packed (hcp)
C Face centred cubic (fcc)
D None of these
Which one of the following materials is very hard and very ductile?
A Carborundum
B Tungsten
C Cast iron
D Nichrome
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
A Maximum principal stress theory
B Maximum shear stress theory
C Maximum strain energy theory
D Maximum distortion energy theory
Ductile 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 and is obtained by cooling rapidly. It is almost unmachinable
C Is produced by annealing process. It is soft, tough and easily machined metal
D 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
The tensile strength of ductile materials is _________ its compressive strength.
A Equal to
B Less than
C Greater than
D None of these

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