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Materials and Construction

Materials and Construction
Percentage of silver in German silver is

0
10
5
20

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Materials and Construction
Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its

Low thermal conductivity
High co-efficient of thermal expansion
All of these
High corrosion resistance

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Materials and Construction
Rotary driers are generally made of

Mild steel
Cast iron
High silicon iron (14% Si)
Tin lined with refractory bricks

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Materials and Construction
Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of

Aluminium
Cast iron
Rubber lined mild steel
Lead lined mild steel

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Materials and Construction
In drop forging process, the forging is done by dropping the __________ at high velocity.

Weight on hammer
Hammer
Die with hammer
Workpiece

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Materials and Construction
18-4-1 high speed steel contains 18%, 4% and 1% respectively of

Vanadium, chromium and tungsten
Tungsten, chromium and vanadium
Chromium, tungsten and vanadium
Tungsten, vanadium and chromium

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