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Chemical Engineering Basics

Chemical Engineering Basics
Deformation band is absent in materials having __________ lattice crystal structure.

Bcc
None of these
Hcp
Fcc

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Chemical Engineering Basics
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

One
Two
None of these
Three

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Chemical Engineering Basics
Out of the following, the dimensionless quantity is

Viscosity
Mach number
Density
Specific weight

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Chemical Engineering Basics
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

Gr, Gr0.25
Gr0.25, Gr
Gr0.25, Gr0.33
Gr0.33, Gr0.25

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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.

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

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Chemical Engineering Basics
Which of the following will resist maxi-mum shock & vibration without cracking?

Graphite
Malleable iron
White cast iron
Grey cast iron

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