A suitable material of construction to use with fuming sulphuric acid is
Which of the following stainless steels is non-magnetic ?
Galvanised iron is
Cast iron has very high
Liquid ammonia is shipped in __________ containers.
Presence of nickel in steel improves its
Cementite is
__________ is never shipped in glass carboys.
Which of the following alloys does not contain nickel ?
The fermentor used for the production of ethyl alcohol from molasses is made of
Which one contains the least percentage of carbon ?
The range of Mho's scale of hardness is from
Percentage elongation of a material is a measure of its
The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
Hammers and railway rails are normally made of
Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.
Constantan is an alloy of
Coke oven regenerators are made of __________ bricks.
Which of the following crystal structures characterises the austenitic stainless steel?
Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and
18-4-1 high speed steel contains 18%,andrespectively of
Aluminium as a material of construction suffers from the disadvantage of
German silver used for decorative purposes contains maximum percentage of
The metals occuring at the lower most position in the electromotive series
Cermets are __________ materials.
Acetylene gas holder is made of
Lead is
Nitriding of steel is done (in electric furnace) at __________ °C.
An elastic behaviour of materials is expressed in terms of
Super conductors are those substances, which
Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of
All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain
Which of the following pairs of elements may form an alloy ?
Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with
Invar used in thermocouples is an alloy of nickel and
Nickel (56%) and molybdenum (17%) alloys are called
Softness of silver can be converted into hardness by alloying it with small quantity of
Fatigue strength of a material increases by
Which of the following heat treatment processes is used for softening the hardened material ?
Steel tower used for the storage of oleum
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containingnickel and has very low co-efficient of expansion (l/20th of ordinary metals) ?
Addition of __________ in steel can help in increasing the depth of hardness.
Babbit metal used for bearings is a____base alloy.
Cast irons are generally specified by their
Addition ofnickel in steel makes it suitable for making
Pure nickel is
Cermets are used for making
Silico-manganese steels (containing 0.Mn, 0.C andSi)
Babbit metals used for making bearings are
For storing water and acid free benzol, use a __________ vessel.