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Engineering Materials

Engineering Materials
Quenching is not necessary when hardening is done by

Flame hardening
Any one of these
Nitriding
Case hardening

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Engineering Materials
When steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of

Mainly ferrite
Pearlite and cementite
Ferrite and pearlite
Mainly pearlite

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Engineering Materials
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

Phosphor bronze
Nichrome
Monel metal
Babbitt metal

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Engineering Materials
Hematite iron ore contains iron about

0.3
0.7
0.45
0.55

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Engineering Materials
Beryllium bronze contains

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

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Engineering Materials
Shock resisting steels should have

Low hardness
Toughness
Low tensile strength
Low wear resistance

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