Q. Principal alloying element in Elinvar (used for making hair springs for watches) is

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Q. The value of y = Cᵨ/Cᵥ. at < 500°C for air & most common gases can be safely assumed to be

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Q. Tesla metre per ampere (T. m/A) is the unit for the measurement of

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Q. Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be

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Q. Which of the following is an acidic constituent of B.F. slag ?

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Q. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is

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Q. Material of construction of the electrode used in the electric resistance welding is

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Q. In practice, the compression ratio of compression-ignition (CI) engine ranges from

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Q. Dislocations are __________ defects.

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Q. The thickness of oxide film is y at time t. If K₁, K₂ and K₃ are the temperature dependent constants, the parabolic law of oxidation is given by

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Q. Which of the following has the least value of ultimate tensile strength (UTS) ?

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Q. Which of the following is a commonly used manometric liquid for low pressure range?

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Q. The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.

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Q. Metal shots used in shot blasting are made of

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Q. At the point of boundary layer separation in fluid flow, the

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Q. Brinell Hardness Number (BHN) for talc is approximately in the range of

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Q. A spring material should have low

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Q. The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.

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Q. The thermodynamic law, PVᵞ = constant, is not followed by the

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Q. Pick out the wrong statement about the machinability of metals. Machinability of a metal

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