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Engineering Materials

Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 65
RC 80
RC 48
RC 57

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Engineering Materials
Body centered cubic space lattice is found in

Alpha iron, tungsten, chromium and molybdenum
Zinc, magnesium, cobalt, cadmium, antimony and bismuth
Gamma iron, aluminium, copper, lead, silver and nickel
None of these

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Engineering Materials
The hardness of steel increases if it contains

Martensite
Cementite
Pearlite
Austenite

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Engineering Materials
Crystal structure of a material is, generally, examined by

Naked eye
X-ray techniques
Metallurgical microscope
Optical microscope

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Engineering Materials
Which of the following pipes is least corrosion resistant?

Brass
Cast iron
Wrought iron
Mild steel

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Engineering Materials
For a steel containing 0.8% carbon

There is no critical point
There is only one critical point
There can be any number of critical points
There are two critical points

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