Q.1
Which of the following is not an alloy of nickel and chromium?
Q.2
Common house hold glass (i.e., soda-lime glass) is a/an __________ material.
Q.3
In SO₃ absorber (Contact Process), packing material used is of
Q.4
Pick the odd man out of the following.
Q.5
For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is
Q.6
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
Q.7
To improve the machinability of steel by its softening, it is subjected to
Q.8
Which of the following is the most widely used insulating material for steam carray-ing pipelines?
Q.9
18/8 stainless steel means, that it contains
Q.10
The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement.
Q.11
A metallic alloy in which one of the constituent metal is __________ , is called an amalgam.
Q.12
The process of heating the cold pressed metallic powder is called __________ in powder metallurgy.
Q.13
Carbon percentage in medium carbon steel is around
Q.14
Addition of nickel to copper improves its
Q.15
The material used in the filament of electric bulbs is
Q.16
The main purpose of galvanising iron sheets is to
Q.17
Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.
Q.18
Maximum consumption of lead is in the manufacture of
Q.19
To improve the machinability of steel, it is generally subjected to
Q.20
In hot wire aneomometer used for gas flow measurement, the wire is normally made of
Q.21
A magnetic material becomes __________ above the Curie temperature.
Q.22
Percentage of silver in German silver is
Q.23
Sulphuric acid pickling tanks are lined with
Q.24
__________ is not a case hardening process.
Q.25
Gunmetal and bronze are not corroded by the action of
Q.26
Which of the following metals in not used for coating of the base metal to guard it against corrosion?
Q.27
__________ is a donor impurity for semi-conductors.
Q.28
Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of
Q.29
Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent.
Q.30
Coke oven walls are lined with __________ bricks.
Q.31
Babbit metal (used for making bearings) comprises of
Q.32
Which of the following is produced by condensation polymerisation?
Q.33
Balls in a ball mill are usually made of
Q.34
Concentrated HCl at 30°C can be stored in a vessel made of
Q.35
__________ iron is produced, when molten pig iron is chilled suddenly.
Q.36
Glass lined vessels are not used for handling/storing
Q.37
Hydrochloric acid is stored in a __________ steel vessel.
Q.38
Alpha iron is stable __________ °C.
Q.39
__________ iron is produced, when molten pig iron is allowed to cool gradually.
Q.40
Pipes for bi-cycle frames are made of __________ steel.
Q.41
Approximate value of the modulus of elasticity for steel is about __________ x l0⁶kg/cm².
Q.42
The chlorinator used in the manufacture of DDT is made of
Q.43
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously.
Q.44
Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it.
Q.45
Brine (15% concentration) can be stored in a vessel made of
Q.46
A bearing metal should not have
Q.47
Which one is remelted and poured into moulds to get cast iron?
Q.48
Reactor used in the production of polyvinyl chloride (PVC) is made of
Q.49
Which of the following is not a nickel based alloy?
Q.50
Rubber lined pumps can be used to pump
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