Which of the following is not a natural abrasive ?
The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containingwt% B is
A psychrometer does not measure the __________ temperature of moist air.
An ideal material for making cooking vessels should have
Super conduction in metals is observed at a temperature of __________ °K.
Which of the following is the most wear resistant grade of carbide used for the cutting tools?
The ratio of mass of a neutron to that of an electron is aboutWhat is the ratio of the mass of a proton to that of an electron?
Quartz is a __________ material.
The rolling process can not be used to produce
Pick out the wrong statement.
Corrosion rate can not be lowered by reducing the __________ of the corroding medium.
Routing in production, planning & control is concerned with the
Which of the following is a unit of time ?
__________ furnace is generally used in the non-ferrous foundaries.
Age hardening is connected with
With decrease in the grain size of a material, its creep resistance
Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio) ?
Electrostatic separation of minerals from each other is based on their differences in the following property.
Gratings is associated with the measurement of
The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.
During solid state sintering of powders, the following mechanism can be active.
Particle nature of cathode rays is proved due to the fact that they
The most commonly used moderator in nuclear power plants is
The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.
Powder metallurgy technique is used in the production of __________ tools.
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
Austempering of steel requires.it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to
A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
Joining of thin foils is preferred to be done by
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
Lead pencil contains
__________ can replace tungsten in high speed steel.
Steel & cast iron pipes are produced by __________ casting.
__________ rubber is generally used for making 'O' rings used for vacuum sealings.
Natural water contains approximately __________ percent of heavy water.
__________ joint is mostly used for joining pipes carrying water at low pressure.
The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
Regeneration of molecular seive requires it to be heated to a temperature of about __________ °C.
Babbit lining is used on brass/bronze bearings to increase the
The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong
Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails
Cadmium in zinc leach liquor is removed by cementation using
A compact estimate about the amount of materials handling between various work stations is obtained from the
Which of the following metals reacts violently with water ?
A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
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