Q.1
Hardened steel is softened by
Q.2
Which of the following has the poorest wel-dability?
Q.3
Photographic plates are coated with
Q.4
Graphite is a good
Q.5
Gun metal is an alloy of
Q.6
Which is the purest form of iron?
Q.7
Galvanised iron is
Q.8
Age hardening is concerned with
Q.9
Aluminium as a material of construction suffers from the disadvantage of
Q.10
Graphite is corroded by
Q.11
Pick out the wrong statement.
Q.12
Aluminium storage vessel can be used to store
Q.13
A material no longer behaves elastically beyond
Q.14
German silver in an alloy of
Q.15
The largest consumption of zinc for alloys is in the making of
Q.16
Which of the following is a non-magnetic material?
Q.17
Which of the following is not a non-ferrous alloy?
Q.18
Pick out the wrong statement.
Q.19
Softening of hardned steel is done by its
Q.20
__________ possesses viscoelastic properties.
Q.21
Fatigue failure of a material results from __________ stress.
Q.22
Trough of an apron conveyor is made of
Q.23
Presence of cobalt in steel improves its
Q.24
Which has the maximum melting point out of the following?
Q.25
The crystal structure of most of the common metals is
Q.26
Presence of nickel in steel improves its
Q.27
Ceramic materials fabrication can not be done by
Q.28
__________ is added in stainless steel to prevent inter crystal corrosion.
Q.29
__________ is never shipped in glass carboys.
Q.30
Neutraliser tank used for reacting nitric acid with ammonia for the production of ammonium nitrate is made of
Q.31
Most suitable material of construction for the storage of concentrated nitric acid is
Q.32
Which of the following pairs of elements may form an alloy?
Q.33
The damage/deterioration of metals by the __________ action of fluids is called 'erosion'.
Q.34
Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of
Q.35
Pick out the wrong statement
Q.36
In order to be called steel, an alloy should have iron percentage greater than
Q.37
Which of the following crystal structures characterises the austenitic stainless steel?
Q.38
Which of the following is a light alloy?
Q.39
A material capable of undergoing large permanent deformation, when subjected to tension is termed as
Q.40
Which one occupies the lowermost position in the electromotive series of metals?
Q.41
Carbon percentage is the same in cast iron and
Q.42
Which one contains the least percentage of carbon?
Q.43
Which of the following has no effect on the carbide forming tendency in steels?
Q.44
Which of the following has a very high carbide forming tendency in steels?
Q.45
Cast irons are generally specified by their
Q.46
Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as
Q.47
Nitriding of steel is a process for
Q.48
The ability of a material to offer resistance to scratching or indentation is a measure of its
Q.49
Cast iron has
Q.50
Carbon is present in the uncombined (graphitic) form in case of
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