Chemical Engineering Basics

Question: In chemical dehumidification of air
[A].

both specific humidity & dry bulb temperature increases.

[B].

both specific humidity & dry bulb temperature decreases.

[C].

specific humidity decreases & dry bulb temperature increases.

[D].

specific humidity increases & dry bulb temperature decreases.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Coating provided on the electrodes used in the arc welding is not expected to
[A].

add alloying elements.

[B].

prevent electrode from contamination.

[C].

stabilise the arc.

[D].

provide protective atmosphere to weld.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Disposable patterns are made of
[A].

metal

[B].

polystyrene

[C].

rubber

[D].

wood

Answer: Option B

Explanation:

No answer description available for this question.

Question: Ferrites are __________ magnetic.
[A].

anti

[B].

para

[C].

ferri

[D].

ferro

Answer: Option C

Explanation:

No answer description available for this question.

Question: Wood is a/an __________ material.
[A].

amorphous

[B].

cellular

[C].

homogeneous

[D].

grannular

Answer: Option B

Explanation:

No answer description available for this question.

Question: Out of the following, the alloy which has equal percentage of constituents, is
[A].

white metal

[B].

gun metal

[C].

duralumin

[D].

constanton

Answer: Option D

Explanation:

No answer description available for this question.

Question: Heating of ferromagnetic materials to a temperature above Curie temperature makes it
[A].

insulator for heat & electricity transmission.

[B].

ferritic.

[C].

behave like paramagnetic materials.

[D].

superconductor.

Answer: Option C

Explanation:

No answer description available for this question.

Question: All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in which neutron is absent.
[A].

deuterium

[B].

hydrogen

[C].

neon

[D].

helium

Answer: Option B

Explanation:

No answer description available for this question.

Question: A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalant bonds resulting in __________ electrons.
[A].

lack of free

[B].

excess of

[C].

decrease in

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Metalloids
[A].

are good conductor of heat & electricity.

[B].

act as electron donors with metals & as electron acceptor with non-metals.

[C].

are not necessarily solids at room temperature.

[D].

are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron.

Answer: Option D

Explanation:

No answer description available for this question.