Q.1
Silicone rubber is not resistant to the corrosive action of
Q.2
With increase in carbide/graphite ratio in cast iron, its
Q.3
A material is called 'ductile', if it can be
Q.4
The maximum percentage of chromium that can be added to steel is about
Q.5
Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making
Q.6
Which of the following has the least carbon percentage?
Q.7
Ceramic materials
Q.8
Ball bearings are generally made of
Q.9
Bell metal is an alloy of
Q.10
Brass is an alloy of
Q.11
Ability of a material to __________ is indicated by its damping capacity.
Q.12
Locomotive boiler tubes are made of __________ alloys.
Q.13
Coke oven regenerators are made of __________ bricks.
Q.14
Tin coating on metals is not done by
Q.15
An ideal material of construction for the storage of 50% caustic soda solution would be
Q.16
Beehive coke ovens are made of __________ bricks.
Q.17
Cold worked steel parts are normally subjected to
Q.18
In cold working of metal as compared to its hot working
Q.19
German silver is an alloy of copper, nickel and
Q.20
Which of the following has the highest density and the lowest melting point?
Q.21
Ball bearings are normally made of __________ steel.
Q.22
Steel balls for ball bearings are generally made of __________ steel.
Q.23
Babbit metal is not a
Q.24
Nickel (56%) and molybdenum (17%) alloys are called
Q.25
The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability?
Q.26
The electrical conductivity of a __________ decreases with rise in temperature.
Q.27
18-4-1 high speed steel contains 18%, 4% and 1% respectively of
Q.28
SO₃ is absorbed using H₂SO₄ in a
Q.29
Acid proof stoneware
Q.30
Steel pipes are normally manufactured by __________ process.
Q.31
Valves in pipe size of 2" and under are normally made of
Q.32
Wrought iron is a suitable material of construction for handling __________ solutions.
Q.33
Clock pendulums are usually made of __________ steel.
Q.34
Presence of high amount of silicon in cast iron
Q.35
18/8 steel is a/an __________ stainless steel.
Q.36
Zinc is highly __________ at room temperature.
Q.37
Brine solution is stored/treated in __________ lined vessels/pipes.
Q.38
Dry chlorine can be handled in a vessel made of
Q.39
How many molecules per unit cell are there in a face centred cubic lettice?
Q.40
Percentage elongation of a material is a measure of its
Q.41
Invar contains the highest percentage of
Q.42
The most distinguished property of malleable cast iron is its high
Q.43
The preferred material of construction for storage tanks for 98% sulphuric acid is
Q.44
High speed cutting tool steels contain about __________ percent of tungsten.
Q.45
Fermenter used in the production of pen-cillin by deep fermentation proces is a __________ lined steel vessel
Q.46
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by
Q.47
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
Q.48
Hydrochloric acid is __________ corrosive to common metals.
Q.49
Nickel base alloys with __________ are known as monel metal.
Q.50
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the
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