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Chemical Engineering Basics

Chemical Engineering Basics
Which of the following heat treatment processes is usually applied to castings ?

Carburising
Annealing
Tempering
Normalising

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Chemical Engineering Basics
A suitable lubricant used for watches is

Metallic soap solution
Palm oil
Grease
Hazel-nut oil

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Chemical Engineering Basics
For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.

Combustion is at constant volume
Maximum temperature is higher
Heat rejection is lower
Expansion & compression are isentropic

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Chemical Engineering Basics
Consideration of the creep is the most important in case of the

Flywheel of steam engine
Cycle chain
Piston of an I. C. engine
Blades of gas turbine

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Chemical Engineering Basics
Which of the following is a boiler accessory i.e., not a boiler mounting ?

Feed water pump
Stop valve
Blow off cock
Feed check valve

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Chemical Engineering Basics
Lime contains about 90% CaO. Percentage CaO present in limestone is about

50
80
25
70

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