Metal spinning
A.Is done at low speeds
B.Is done on unsymmetrical articles
C.Is done on symmetrical articles
D.Does not require dies
E.Utilises point hard tools
Category: Engineering Materials Mcqs
In fibre glass reinforced plastics, the glass fibres are primarily used to improve
A.Mechanical properties of plastics
B.Electrical properties of plastics
C.Thermal properties of plastics
D.Surface properties of plastics
E.None of the above
A steel having ferrite and pearite is
A.Soft
B.Hard
C.Ductile
D.(A) and (B) above
E.(A) and (C) above
If steel is cooled in still air, the structure obtained is
A.Pearlite
B.Sorbite
C.Troosite
D.Acicular
E.Martensite
Nichrome are alloys of
A.Nickel, chromium
B.Nickel, chromium and copper
C.Nickel, chromium and silver
D.Nickel, chromium and aluminium
E.Nickel, chromium and iron
Brinell hardness number for nitrided steel is in the range
A.60 to 80
B.100 to 150
C.200 to 300
D.300 to 450
E.700 to 800
Which of the following is donor impurity for semi-conductors?
A.Antimony
B.Aluminium
C.Boron
D.Indium
E.Callium
Hot tear
A.Is a physical property of non-ferrous materials
B.Is a process involving heating
C.Is a phenomenon occurring in materials ixposed to weather e.g. sun and rain
D.Is a defect in wood
E.Is a defect in castings
Every material obeys the Hooke’s law within
A.Elastic limit
B.Plastic limit
C.Breaking limit
D.Yield limit
E.Limit of proportionality
The process of producing parts by electrolytic deposition of metal upon a conductive removable mould or matrix is known as
A.Deposition
B.Plating
C.Electrolysis
D.Electro-moulding
E.Electro forming
