The ratio of coil diameter to wire diameter of a spring is called the spring
Isotropic materials have the same __________ in all the directions.
A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action.
Galena is an ore of
A reduction process is accompanied with increase in the
Nitrogen compounds are not used in the manufacture of
Increasing the temperature of a material makes it
Which of the following absorbs maximum heat in a high pressure boiler ?
Diamond does not conduct electricity, because
__________ can not be forged.
Which of the following alloying elements reduces the formation of iron sulphide in steel ?
Yield strength of a polycrystalline metal with an average grain size, d, is proportional to
A simple closed grinding circuit may consist of
Disposable patterns are made of
The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
Dialysis is the process of separating substances in the
The gases used in the treatment of asthma is a mixture of __________ and oxygen.
An ideal fluid is
When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the
Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
Stellite is a trade name for the
The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)
Material having maximum density is
In age-hardenable alloys, maximum ductility is obtained
Prandtl mixing length in turbulent flow signifies the
Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore ?
Needles are produced by
Magnesium addition to cast iron increases its
A material subjected __________ must have high resilience.
Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas)
The fatigue resistance of a material is improved by the following technique.
Which is the most suitable joint for the pipes, with are laid submerged under water, where the bottom of the river bed is uneven ?
Floating control action
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
__________ property of steel increases by addition of large amount of silicon in it.
Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
Triple point of water is
Solute atoms which cause yield point phenomenon in mild steel are/is
Silicon crystal can be converted to p-type semi-conductor by doping with
A material lacking in toughness is usually termed as
The basic constituent of vegetable oils is
Increase in temperature, in general results in the
Which of the following can be manufactured using powder metallurgy techniques?
Boiler rating is normally done in terms of
Metal shots used in shot blasting are made of
At the point of boundary layer separation in fluid flow, the
Basic open hearth furnace (BOF) is not used for producing __________ steel.
Principal alloying element in Elinvar (used for making hair springs for watches) is
__________ stress can not be sustained by a fluid in equilibrium.
__________ test can be termed as the semi-distructive test.
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