Q.1
Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys.
Q.2
The purpose of nitriding the steel is to
Q.3
The temperature at which new grains are formed in the metal is called the __________ temperature.
Q.4
A material capable of undergoing large permanent deformation, when subjected to compression is termed as
Q.5
The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called
Q.6
Duralumin is an alloy of
Q.7
Duriron is
Q.8
__________ does not contain copper as an alloying element,
Q.9
Copper has very low
Q.10
Hardest materials so far found is
Q.11
Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of
Q.12
Which of the following is produced by addition polymerisation?
Q.13
Ammonium chloride solution is stored/ treated in __________ vessels/pipes.
Q.14
Wood metal is not used for making
Q.15
Plasticisers are added to polymers to improve their
Q.16
DDT is shipped in
Q.17
'Age hardening' of duralumin is due to
Q.18
Chilled iron castings are
Q.19
Refined acetic acid storage vessel are made of
Q.20
Nickel is a __________ material.
Q.21
Bearings subjected to light load are made of
Q.22
Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and
Q.23
In the kraft (sulphate) process for the paper manufacture, the digestor is made of
Q.24
Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of
Q.25
Evaporators used in caustic soda recovery and production plant are made of
Q.26
Silicon percentage in acid resistant cast iron is about
Q.27
Constantan is an alloy of
Q.28
The fermentor used for the production of ethyl alcohol from molasses is made of
Q.29
The heat treatment process to which castings and the steel balls produced by cold heading are subjected is
Q.30
Alinco, which is a aluminium-cobalt-nickel steel, is used for making
Q.31
Biological shield in a nuclear power reactor is made of
Q.32
Ceramic materials are
Q.33
Cermets are used for making
Q.34
Interchain forces are the weakest in case of
Q.35
Which of the following comprises of hydrocarbons?
Q.36
Specify the material of construction suitable for handling concentrated HNO₃ at 100°C.
Q.37
Which of the following is not an alloy of copper?
Q.38
Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its
Q.39
Constituents of stellite are
Q.40
Polythene (low or high density) containers are not corroded by
Q.41
The behaviour of visco-elastic material is time dependent. This behaviour is commo in __________ materials.
Q.42
Cast iron compared to steel is better in
Q.43
Acetylene gas holder is made of
Q.44
Low carbon steels are those in which carbon percentage is around
Q.45
Softness of silver can be converted into hardness by alloying it with small quantity of
Q.46
Tempering of steel is done to make it
Q.47
Maximum permissible sulphur content in steel is __________ percent.
Q.48
Carbon content in steel is __________ percent.
Q.49
Carbon content in plain carbon steel is __________ percent.
Q.50
Constantan used in thermocouples is an alloy of
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