Related Questions
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Pressure exerted by a liquid depends upon its
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Pick out the wrong statement.
A. A ferromagnetic material becomes paramagnetic above the 'Curie temperature'
B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials
C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces
D. Tungsten steel and alnico are not hard magnetic materials
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4
Identify the correct statement.
A. Sphlerite is zinc oxide
B. The first law of the thermodynamics is stated as δE = δQ - δW
C. Lead can be produced in a blast furnace
D. T. ferrooxidans is a fungus that can be used for leaching chalcopyrite
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__________ stress cannot be sustained by a fluid in equilibrium.
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Which of the following contributes maximum as main source of sulphur in the blast furnace charge?
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Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
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In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller).
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Cold heading or upsetting is categorised as the __________ process.
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Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
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The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
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Faraday's law of electrolysis is related to the
B. Atomic number of the cation
C. Equivalent mass of the electrolyte
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Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
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Carbon supply in pack carburising process is in the form of
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Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?
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Maximum hardenability of steel depends upon its
D. Alloying elements content
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__________ temperature remains constant during adiabatic saturation process of unsaturated air.
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The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
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The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is
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4
Ammonia leakage in the refrigeration system is detected by
A. Sulphur stick, which on detection gives white smoke
B. Using chemical reagents
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Wavelength of radiation emitted by a body depends on the __________ of its surface.
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Non-ferrous alloys used for making cutting tools need not have high
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Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
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Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel.
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Galvanic corrosion cannot be prevented by
C. Usage of largest possible anodic area
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Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.
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The joint for soldering is supported by binding wire made of
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Hot extrusion of aluminium is done in the temperature range of __________ °C.
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A jig is used while __________ a hole.
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Dew point temperature always gives an indication of the __________ of the moist air.
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On being hit with a hammer, __________ will readily fracture.