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Engineering Materials

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

RC 57
RC 48
RC 65
RC 80

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Engineering Materials
Ductility of a material can be defined as

Ability to undergo large permanent deformations in compression
All of these
Ability to undergo large permanent deformations in tension
Ability to recover its original form

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Engineering Materials
Beryllium bronze contains

99% copper and 1% beryllium
97.75% copper and 2.25% beryllium
60% copper and 40% beryllium
80% copper and 20% beryllium

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Engineering Materials
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio

2.9375
2.1180555555556
30 : 70
40 : 60

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Engineering Materials
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

More than
Less than
Equal to
None of these

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Engineering Materials
An engineer's hammer is made of

High carbon steel
Cast iron
Mild steel
Forged steel

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