Chemical Engineering Basics
Salvage value is the most flexible criteria for analysing a financial investment. 'Salvaging' means

Disposing off a machine/property on as is where is basis
Writing off the obsolete machine/ property
Disposing off machine/property, which is no longer useful in the present scenerio
Mortgaging the obsolete machine/property

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Chemical Engineering Basics
Compression ratio of an I.C. engine is the ratio of the

Pressure after compression to that before compression
None of these
Clearance volume to the volume swept by piston per stroke
Volume of air in cylinder before compression to that after compression

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Chemical Engineering Basics
The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

Decreasing the surface area of the electrodes
Increasing the surface area of the electrodes
Increasing the concentration of copper sulphate solution
Increasing the concentration of zinc sulphate solution

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