Chemical Engineering Basics - Chemical Engineering Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

μ , α and θ all have units of m/s.

μ , α and θ all have units of m²/s.

α and θ have units of m²/s, while μ has unit of m/s.

α and θ have units of m/s, while μ has unit of m²/s.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Window panes of aeroplanes are normally made of

perspex (PMMA)

teflon (PTFE)

bakelite (phenol formaldehyde)

polystyrene

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

__________ flux is used for the extraction of metal from its self fluxing ores.

Acid

Basic

Neutral

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Good design of the casing of a centrifugal pump aims at minimising the

cavitation

frictional losses

kinetic energy loss

static head

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

A dummy activity is used in PERT network to describe the

precedence relationship.

resource idleness.

resource restriction.

necessary time delay.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Which of the following is not a characteristic observed in material failure by fatigue fracture ?

Plastic deformation of material does not occur.

Initiation of crack from below the surface does not occur.

Initation of crack occurs on the surface of the machine part.

Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.

150

200

300

400