Related Questions
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Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
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The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the
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4
Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.
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Cementite is in the lamellar form in the __________ phase of steel.
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4
For dynamic strain measurement, the Wheatstone bridge used is of __________ type.
A. Voltage sensitive null
B. Voltage sensitive deflected
C. Current sensitive deflected
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4
__________ flux is used for the extraction of metal from its self fluxing ores.
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Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are:
A. Nickel, cobalt & chromium
B. Tungsten, chromium & cobalt
C. Manganese, chromium & cobalt
D. Tungsten, molybdenum & nickel
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Lead is poured into the joint between two __________ pipes.
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Tin based white metals are used, where bearings are subjected to
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Fibre glass is a composite material of
A. Glass fibre in a polymer matrix
B. Glass fibre in a metallic matrix
C. Polymer fibre in a glassy matrix
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4
The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.
B. Evaporation efficiency
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For grinding of softer materials, the grinding wheel should have __________ grain size.
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High endurance limit of carburised machine parts is because of the fact that carburisation
A. Suppresses any stress concentration produced in the parts
B. Enhances the yield point of the material
C. Introduces a compressive layer on the surface
D. Produces a better surface finish
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4
Most of the phosphorous present in the blast furnace burden enters into
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Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is
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Presence of nickel & chromium in steel does not raise its
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Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)
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4
Brazing filler metal used for joining steel plates
A. Melts below the melting points of base metals
C. Is copper phosphorous alloy
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__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
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4
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
In connection with corrosion of metals, passivation is the process that
A. Intensifies deterioration
B. Changes the composition of the metal
C. Inhibits further deterioration
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__________ stress cannot be sustained by a fluid in equilibrium.
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Production of a hollow product by inflation of a tube or parison is called the __________ process.
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Steel balls are manufactured by
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A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is
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4
Cascade control is
A. The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller
B. Used when changes in process conditions cause serious upsets in the controlled variable
C. Useful to control flow from temperature
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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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The leaching solvent used in Baeyer's process for the purification of bauxite is
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The most abundant metal present in the earth's crust is;
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Non-ferrous alloys used for making cutting tools need not have high