Metal at the top of the electromotive series is
Fatigue failure of a material may occur, when it is subjected to __________ stress.
Galvanising (i.e., zinc coating) of steel sheets is done to
Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2. Lead pipes are readily corroded by
Acetaldehyde is shipped in __________ drums.
Which of the following is not an alloy of copper ?
Iron rust is
Vessels made of __________ can be used to store dry chlorine.
For spinning viscose rayon, the extrusion spinnerettes are made of
Which of the following is not a non-ferrous alloy ?
High degree of toughness is a must for
'Hypersil' is a __________ steel.
Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys.
A steel alloy containingnickel is called __________ , which has a zero co-efficient of expansion.
Which of the following contains maximum percentage of carbon ?
Which of the following alloying elements is present in maximum percentage in high speed steel.
Mild steel is a/an __________ steel.
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.
High speed steel should have high
An alloy of iron containingcarbon is called
Monel metal is an alloy of
Which of the following is the most prone to atmospheric corrosion ?
Urea autoclave is made of
Mild steel is
Alpha iron is stable __________ °C.
__________ can replace tungsten in high speed steel,
Tempering of steel is done to make it
Electronic structure of a material is generally studied by
Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.Carbon is not used for making
Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its
Neutraliser tank used for reacting nitric acid with ammonia for the production of ammonium nitrate is made of
__________ is used for determining the tensile strength of steels.
Carbon tetrachloride can be stored in a storage vessel made of
Steel pipes are normally manufactured by __________ process.
German silver is an alloy of copper, nickel and
As the impurities are oxidised, the melting point of iron
Which is the purest form of iron ?
__________ iron is produced, when molten pig iron is allowed to cool gradually.
Most of the common metals have __________ crystal structure.
Thermosetting polymers are
Karbate is
Maximum consumption of copper is in
Gas holder of a gobar (cowdung) gas plant is made of
Mild steel storage vessels are suitable for the storage of
The process of coating steel sheets by zinc to improve its corrosion resistance is called
Polymorphism is not exhibited by
The presence of impurities in iron
In a plate type heat exchanger, heat transfer plates are never made of
White cast iron as compared to grey cast iron is
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