Related Questions
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The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2.
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The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
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4
In the Bayer's process, bauxite is digested under pressure using
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Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8
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4
The most serious manufacturing defect from fracture toughness point of view is
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Fire in fuel gas pipelines is extinguished most effectively by
B. Blanketting the area with nitrogen atmosphere
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Which of the following properties of a solid is not dependent on crystal imperfection?
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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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Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?
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Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
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The most abundant metal present in the earth's crust is;
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For an ideal gas, Cp - Cv is
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The thermodynamic law, = constant, is not followed by the
A. Free expansion of an ideal gas
B. Adiabatic expansion of steam in turbine
C. Adiabatic compression of air
D. Ideal compression of air
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The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
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Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
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__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.
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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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The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
D. Unpredictable; depends on the bubble size
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A spring material should have low
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'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and
C. Light hydrocarbon gases (e.g. butane or propane)
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Ferromagnetic materials owe their properties to __________ inner sub-shells.
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Projection welding & stud welding is categorised as the __________ welding.
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Gas turbine normally employs a constant __________ cycle.
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Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm.
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The type of pump used for lifting large quantity of sewage is a __________ pump.
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Atomic __________ is a whole number for an element.
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Which of the following metals reacts violently with water?
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Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional to
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4
Broaching tools are usually made of
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Transformer cores are normally made from
C. Grain oriented Fe-Si alloy