CHEMICAL ENGINEERING | Chemical Engineering Basics

Materials having resistivity ranging from 1 to 100 ohm. cm is termed as

Byadmin August 3, 2022

Question: Materials having resistivity ranging from 1 to 100 ohm. cm is termed as
[A].

conductor

[B].

insulator

[C].

semi-conductor

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Heat Transfer

A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m3 and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m2.K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is

Question: A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m3 and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m2.K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is
[A].

555
[B].
55.5
[C].
0.55
[D].
0.15

Answer: Option D

Explanation:

No answer description available for this question.

Read More A metal ball of radius 0.1 m at a uniform temperature of 90°C is left in air at 30°C. The density and the specific heat of the metal are 3000 kg/m3 and 0.4 kJ/kg.K respectively. The heat transfer co-efficient is 50 W/m2.K Neglecting the temperature gradients inside the ball, the time taken (in hours) for the ball to cool to 60°C is
CHEMICAL ENGINEERING | Chemical Engineering Basics

__________ is not a heat treatment process.

Question: __________ is not a heat treatment process.
[A].

Cyaniding
[B].
Pakerising
[C].
Austempering
[D].
Martempering

Answer: Option B

Explanation:

No answer description available for this question.

Read More __________ is not a heat treatment process.
CHEMICAL ENGINEERING | Chemical Engineering Basics

An oxidation process is accompanied with decrease in the

Question: An oxidation process is accompanied with decrease in the
[A].

number of electrons.
[B].
oxidation number.
[C].
number of ions.
[D].
all (a), (b) & (c).

Answer: Option A

Explanation:

No answer description available for this question.

Read More An oxidation process is accompanied with decrease in the
Chemical Engineering Basics

Dielectric___________________?

Dielectric___________________?

A. Is an electrical insulating material
B. Of low resistivity is preferred
C. Should have high thermal conductivity
D. Need not defy the corrosive action of chemicals

Read More Dielectric___________________?
CHEMICAL ENGINEERING | Chemical Engineering Basics

In sheet metal forming, stretcher strains occur in

Question: In sheet metal forming, stretcher strains occur in
[A].

duralumin sheets.
[B].
low carbon steel sheets.
[C].
austenitic stainless steel sheets .
[D].
Ni-base alloy sheets.

Answer: Option A

Explanation:

No answer description available for this question.

Read More In sheet metal forming, stretcher strains occur in
CHEMICAL ENGINEERING | Environmental Engineering

Fresh sewage is __________ in nature.

Question: Fresh sewage is __________ in nature.
[A].

acidic
[B].
neutral
[C].
alkaline
[D].
highly acidic

Answer: Option C

Explanation:

No answer description available for this question.

Read More Fresh sewage is __________ in nature.

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