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Chemical Engineering Basics

Chemical Engineering Basics
A suitable lubricant used for watches is

Grease
Palm oil
Metallic soap solution
Hazel-nut oil

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Chemical Engineering Basics
The weight of a body at the centre of the earth is

Zero
None of these
Same as on the surface of the earth
Infinite

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Chemical Engineering Basics
Kinematic viscosity of water as compared to that of air is

15% less
15% more
Same
More

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Chemical Engineering Basics
A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/seC₂ is

0.95
9.81
8.82
10.88

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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.

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

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Chemical Engineering Basics
In age-hardenable alloys, maximum ductility is obtained

After overageing
After optimum ageing
Immediately after solution treatment and subsequent quenching
In as cast state

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