CHEMICAL ENGINEERING | Heat Transfer

jH factor for heat transfer depends upon the __________ number.

Byadmin August 25, 2022

Question: jH factor for heat transfer depends upon the __________ number.
[A].

Biot

[B].

Nusselt

[C].

Reynolds

[D].

Prandtl

Answer: Option C

Explanation:

No answer description available for this question.

CHEMICAL ENGINEERING | Chemical Engineering Basics

Oxyacetylene reducing flame is used while carrying out welding on

Question: Oxyacetylene reducing flame is used while carrying out welding on
[A].

alloy steel
[B].
grey cast iron
[C].
mild steel
[D].
high carbon steel

Answer: Option C

Explanation:

No answer description available for this question.

Read More Oxyacetylene reducing flame is used while carrying out welding on
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be

Question: It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be
[A].

dehumidification
[B].
cooling and humidification
[C].
cooling and dehumidification
[D].
dehumidification and pure sensible cooling

Answer: Option C

Explanation:

No answer description available for this question.

Read More It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be
CHEMICAL ENGINEERING | Materials and Construction

Invar used in thermocouples is an alloy of nickel and

Question: Invar used in thermocouples is an alloy of nickel and
[A].

iron
[B].
copper
[C].
chromium
[D].
lead

Answer: Option A

Explanation:

No answer description available for this question.

Read More Invar used in thermocouples is an alloy of nickel and
CHEMICAL ENGINEERING | Fuels and Combustion

Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.

Question: Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
[A].

1000
[B].
4000
[C].
6000
[D].
8000

Answer: Option B

Explanation:

No answer description available for this question.

Read More Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
CHEMICAL ENGINEERING | Chemical Engineering Basics

During solid state sintering of powders, the following mechanism can be active.

Question: During solid state sintering of powders, the following mechanism can be active.
[A].

Evaporation and condensation.
[B].
Solid state diffusion processes.
[C].
Liquid formation in grain boundaries.
[D].
Creation of more dislocations.

Answer: Option B

Explanation:

No answer description available for this question.

Read More During solid state sintering of powders, the following mechanism can be active.
CHEMICAL ENGINEERING | Chemical Engineering Basics

For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be

Question: For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
[A].

100% indirect reduction.
[B].
100% direct reduction.
[C].
50-60% indirect reduction.
[D].
30-40% indirect reduction.

Answer: Option C

Explanation:

No answer description available for this question.

Read More For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be

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