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Engineering Materials

Engineering Materials
Which of the following is used for bearing liner?

Bronze
Bell metal
Gun metal
Babbitt metal

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Engineering Materials
The crystal structure of brass is

Orthorhombic crystalline structure
F.C.C.
C.C.
H.C.P.

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Engineering Materials
A material is said to be allotropic, if it has

Different crystal structures at different temperatures
Any one of the above
Fixed structure at all temperatures
Atoms distributed in random pattern

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Engineering Materials
If a refractory contains high content of silicon, it means refractory is

Acidic
Neutral
Basic
Brittle

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Engineering Materials
Addition of lead and bismuth to aluminium results in

Improvement of corrosion resistance
One of the best known age and precipitation hardening systems
Improvement of casting characteristics
Improving machinability

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Engineering Materials
The hardness of steel increases if it contains

Austenite
Pearlite
Cementite
Martensite

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