Copper has very low
High resistance electrical heating elements/wire are not made of
Cast irons are generally specified by their
Presence of 0.3 to 0.arsenic in copper increases its
The specific gravity of coal depends mainly on its __________ content.
Which of the following has no effect on the carbide forming tendency in steels ?
Softening of hardned steel is done by its
The crystal structure of most of the common metals is
A metallic alloy in general as compared to their pure metal components is
In the Contact process of sulphuric acid manufacture,acid cooler is made of
In hot wire aneomometer used for gas flow measurement, the wire is normally made of
Babbit metal is not a
Stainless steel is not corroded by
Low carbon steels are those in which carbon percentage is around
Hardest material so far found is
Which one is remelted and poured into moulds to get cast iron ?
The heat treatment process applied to cold formed steel parts is
Approximate value of the modulus of elasticity for steel is about __________ x l06kg/cm2.
Maximum permissible sulphur content in steel is __________ percent.
Telfon (PTFE) is corroded by
Pick out the wrong statement.
Platinum and silver are corroded by
The heat treatment process to which castings and the steel balls produced by cold heading are subjected is
Which of the following alloys does not contain nickel ?
__________ is added in stainless steel to prevent inter crystal corrosion.
White metal is an alloy of
Most suitable material of construction for the storage of concentrated nitric acid is
Wood metal is not used for making
The largest consumption of zinc for alloys is in the making of
Which of the following is the lightest of engineering metals ?
Nickel is a __________ material.
The carbonating tower used in Solvay process of soda ash manufacture is made of
Plate and frame filter press is usually made of
Evaporators used in caustic soda recovery and production plant are made of
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
Constituents of stellite are
With increase in carbide/graphite ratio in cast iron, its
Sulphur melting pit in the sulphuric acid plant is made of
Which of the following has the highest compressive strength ?
German silver in an alloy of
Dielectric strength of a material is
White cast iron is not
18/8 steel is a/an __________ stainless steel.
Residual magnetism in steel for magnets is increased by the addition of
The hardest material just prior to diamond in Mho's scale is
The main purpose of galvanising iron sheets is to
Ceramic recuperators are generally made of
Zinc is not used
Refined acetic acid storage vessel are made of
The behaviour of visco-elastic material is time dependent. This behaviour is common in __________ materials.