A ductile fracture is characterized by
A.Rapid rate for crack propagation
B.Negligible deformation
C.Fragmentation into more than two pieces
D.Appreciable plastic deformation prior to propagation of crack
E.None of the above
Category: Engineering Materials Mcqs
Preheating of material to be welded is necessary in case of
A.Carbon steel
B.Stainless steel
C.High speed steel
D.Cast iron
E.Non-ferrous materials
In plain carbon steel as the percentage of carbon increases from 0.2% to 0.8% which of the following decreases?
A.Brinell hardness number
B.Tensile strength
C.Percentage elongation
D.All of the above
E.None of the above
The atomic number of a certain element is 83. An atom of this element must contain
A.42 protons and 41 electrons
B.83 neutrous
C.1 neutron, 41 electrons and 41 protons
D.83 electrons
E.None of the above is valid
Trimming is a process associated with ______________ ?
A.Forging
B.Electro plating
C.Press work
D.Machining of metals
E.Polishing of metals
Continue reading “Trimming is a process associated with ______________ ?”
Solder is an alloy consisting of _________________?
A.Tin, antimony and copper
B.Tin and copper
C.Tin and lead
D.Lead and copper
E.Copper and aluminium
Continue reading “Solder is an alloy consisting of _________________?”
The theory of failure generally applied in case of brittle materials is
A.Maximum shear stress theory
B.Maximum principal stress theory
C.Maximum strain energy theory
D.Maximum shear strain energy theory
E.Theory of superposition
Which one is different from the other in press work?
A.Blanking
B.Punching
C.Perforating
D.Slitting
E.Seaming
Electronic structure of a material is generally studied by
A.Naked eye
B.Microscope
C.X-ray and electron diffraction
D.Spectroscope techniques
E.Mossbauer studies
An elastic behaviour of materials is expressed in terms of
A.Stress strain curve
B.Relaxation time
C.Adiabatic time
D.Isothermal time
E.Hysteresis loop area
