Q.1
Wrought iron
Q.2
White cast iron
Q.3
When the steel is normalized, its
Q.4
The portion of the blast furnace below its widest cross-section is called
Q.5
The silicon steel is widely used for
Q.6
A small percentage of boron is added to steel in order to
Q.7
Steel contains
Q.8
Amorphous material is one
Q.9
Connecting rod is usually made of
Q.10
Blast furnace is used to produce
Q.11
Compressive strength of grey cast iron in tonnes/cm is of the order of
Q.12
An eutectoid steel consists of
Q.13
Brass is an alloy of
Q.14
The transistor is made of
Q.15
The purpose of heat treatment is to
Q.16
The tensile strength of wrought iron is maximum
Q.17
Sulphur in steel
Q.18
Connecting rod is, usually, made from
Q.19
Ball bearings are, usually, made from
Q.20
Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is
Q.21
In compression, a prism of brittle material will break
Q.22
Hardness of lower bainite (tempered martensite) is about
Q.23
The compressive strength of cast iron is __________that of its tensile strength.
Q.24
Shock resisting steels should have
Q.25
White metal contains
Q.26
Chromium when added to steel _________ the tensile strength.
Q.27
Which of the following has a fine gold colour and is used for imitation jewellery?
Q.28
Large forgings, crank shafts, axles normally contain carbon up to
Q.29
Cemented carbide tools are not found to be suitable for cutting
Q.30
The unit cells
Q.31
Pig iron is the name given to
Q.32
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
Q.33
Wrought iron is
Q.34
Which of the following alloys does not have copper as one of the constituents?
Q.35
Which of the following display properties similar to that of steel?
Q.36
When low carbon steel is heated up to upper critical temperature
Q.37
When low carbon steel is heated up to lower critical temperature
Q.38
The lower critical temperature
Q.39
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is
Q.40
Closed packed hexagonal space lattice is found in
Q.41
Cupola produces following material
Q.42
Body centered cubic space lattice is found in
Q.43
A material is said to be allotropic, if it has
Q.44
The surface hardness of the following order is achieved by nitriding operation
Q.45
Slow plastic deformation of metals under a constant stress is known as
Q.46
Gun metal contains
Q.47
Which is the false statement about wrought iron? It has
Q.48
Foundry crucible is made of
Q.49
Perminvar alloy having constant permeability is an alloy of
Q.50
Tungsten in steel
0 h : 0 m : 1 s