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
Category: Engineering Materials Mcqs
Trimming is a process associated with ______________ ?
A.Forging
B.Electro plating
C.Press work
D.Machining of metals
E.Polishing of metals
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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
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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
According to Hooke’s law
A.Stress is proportional to strain
B.Stress/strain is constant
C.Average stress is proportional to average strain
D.Within elastic limits average stress is proportional to average strain
E.None of the above
Process of making a thin phosphate coating on steel to act as a base or primer for enamels and paints in known as
A.Prepainting
B.Surface preparing
C.Parkerizing
D.Anodising
E.Colourizing
The common household glass is
A.Soda lime glass
B.Borosilicate glass
C.High silica glass
D.Lead glass
