Chemical Engineering Basics

Question: Glycerene is used as a coolant in cooling of some engines instead of water, because
[A].

its higher boiling point (290°C) increases its heat carrying capacity.

[B].

compartively less weight of coolant is required.

[C].

smaller radiator can be used.

[D].

all a, b & c.

Answer: Option D

Explanation:

No answer description available for this question.

Question: 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.
[A].

150

[B].

200

[C].

300

[D].

400

Answer: Option B

Explanation:

No answer description available for this question.

Question: An orthotropic material is a special class of anisotropic material, which is described by their properties in three perpendicular directions. An example of orthotropic material is
[A].

stainless steel

[B].

cast iron

[C].

wood

[D].

teflon

Answer: Option C

Explanation:

No answer description available for this question.

Question: Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of
[A].

90% tungsten carbide and 10% cobalt.

[B].

70% aluminium oxide & 30% silica.

[C].

30% nickel, 15% chromium & 55% tungsten.

[D].

65% tungsten & 35% zirconium.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.
[A].

scratch

[B].

indentation

[C].

dynamic

[D].

rebound

Answer: Option A

Explanation:

No answer description available for this question.

Question: Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher
[A].

ductility

[B].

impact strength

[C].

machinability

[D].

melting point

Answer: Option C

Explanation:

No answer description available for this question.

Question: Wrought iron is never shaped by
[A].

casting

[B].

cold working

[C].

forging

[D].

welding

Answer: Option A

Explanation:

No answer description available for this question.

Question: Boiler draught of 10 mm water column is equivalent to
[A].

1 kgf/m2

[B].

10 kgf/m2

[C].

10 kgf/mm2

[D].

1 kgf/mm2

Answer: Option B

Explanation:

No answer description available for this question.

Question: Aromatics are desired constituents of
[A].

lubricating oil

[B].

diesel

[C].

kerosene

[D].

petrol

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
[A].

Packed

[B].

Bubble

[C].

Spray

[D].

Tray

Answer: Option C

Explanation:

No answer description available for this question.