Related Questions
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Addition of __________ to steel does not impart hardness.
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Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?
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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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L.D. (Linz-Donawitz) converter is used in the production of
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Cemented carbide tools are not suitable for cutting
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On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
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Machinability of hard alloys and tool steels is improved by
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Which of the following represents the correct time-temperature curve when a block of metal is heated above room temperature & then left to cool in the room following Newton's law of cooling in which the rate of temperature drop will go on decreasing with the passage of time.
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Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
A. Small punches, broaches reamers and springs
B. Cutlery, screws, rivets and files
C. Mandrels, twist drills, small lathe tools and razors
D. Forgings like can shaft, structural steel plate, threading dies and drawing dies
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Internal energy of a gas obeying Van-Der- Waals equation of state, [p + (a/v2)] (V - b) = RT, depends upon its
A. Pressure & temperature
B. Pressure & specific volume
C. Temperature & specific volume
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For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = - 60000 J . mole-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be
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4
Magnetic permeability of iron is increased by its
D. Alternate heating & cooling
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Often earing defects are found during deep drawing operation, because the
A. Surface finish of the sheet is poor
B. Sheet material has been given substantial spring back
C. Starting sheet has planer anisotropy due to its texture
D. Starting sheet has normal anisotropy due to its texture
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The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.
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What is the value of included angle of a triangular notch for maximum discharge?
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Pick out the wrong statement.
A. Complete unity of command exists in a line organisation
B. Line organisation is net suitable for expansion and growth of an industry
C. In line and staff organisation, line executes and staff directs
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4
Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.
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Electrochemical corrosion can occur, only if __________ is present in contact with metal.
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If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
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Rankine cycle comprises of two isothermal and two __________ processes.
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A pycnometer is used for the measurement of
A. Flow rate of molten metal
B. Specific gravity of a liquid
D. Concentration of a solution
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In the blast furnace, incorporation of water vapour in the blast gives the following effect.
A. Increases the reducing potential of the gas
B. Increases the flame temperature
C. No significant change occurs
D. Increases the hydrogen content in the metal
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4
Methyl orange indicator turns
A. Orange yellow in alkaline medium
B. Orange yellow in acidic medium
C. Colourless in acidic medium
D. Colourless in basic medium
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Corrosion of metals cannot be prevented by its
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Induced draft fans provided in large thermal power plant boilers have __________ blades.
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Primary designation of steel is based on its
A. Hardness & tensile strength
D. Alloying elements content
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If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
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Optical activity is a/an __________ property.
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What is the pH of distilled water?
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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