Powder metallurgy process does not make metal powder by
In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)
Nuclear fission of one atom of uranium-produces the energy equivalent to about __________ MeV.
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.
If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity
In the blast furnace, incorporation of water vapour in the blast gives the following effect.
Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)
__________ of air does not increase with increase in temperature.
The most suitable material of construction for a sewer to carry sewage under high pressure is
Case hardening is not done by
Cobalt -is used as a source of __________ in medical therapy & industrial radiography.
A solar cell converts the sunlight directly into __________ energy.
Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
Titanium alloys are welded using the Following process:
Copper deposits are found in India at the following location:
Pick out the wrong statement.
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
Propulsion of rocket follows from the
Spherical shape of mercury droplets is due to its
Filler material used in welding should have __________ as compared to the parent metal to be welded.
Satellites burn off during re-entry to earth's atmosphere, because of the
With increase in compression ratio, the volumetric efficiency of air compressor
Absolute zero pressure can be attained at a temperature of
If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is
Machinability of hard alloys and tool steels is improved by
Laser welding is widely employed in the __________ industries.
An alloy of Fe - 0.4 % C is
Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.
To counteract the bad effects of strain hardening on a cold formed part, it must be
With increase in annealing temperature, the following defect density decreases.
Energy of the sun arises mainly from __________ reactions.
In multipass welds, shot peening is done after each pass to
Pick out the correct statement.
Sub zero treatment of steel is done to
Oxygen cylinders used for autogenous (cutting/welding) purposes are
Neutrons are present in all atoms except that of
The product out from a cupola is called
Wrought iron is never shaped by
The specific gravity of coal depends mainly on its __________ content.
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.
Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.
Which of the following is used to produce draught in the locomotive boilers ?
A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is
Corrosion of metals can not be prevented by its
Maximum permissible air velocity in pipelines is about __________ metre/second.
The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then
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