CHEMICAL ENGINEERING | Fuels and Combustion

Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

Byadmin August 19, 2022

Question: Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.
[A].

1100

[B].

1250

[C].

1350

[D].

1400

Answer: Option A

Explanation:

No answer description available for this question.

Fuels and Combustion

Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________________?

Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________________?

A. High rank coals have higher amount of volatile matter
B. Ratio of fixed carbon to volatile matter increases
C. Oxygen content progressively decreases
D. Calorific value of the coal increases

Read More Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________________?
CHEMICAL ENGINEERING | Fluid Mechanics

Creeping flow around a sphere is defined, when particle Reynolds number is

Question: Creeping flow around a sphere is defined, when particle Reynolds number is
[A].

< 2100
[B].
< 0.1
[C].
> 2.5
[D].
< 500

Answer: Option B

Explanation:

No answer description available for this question.

Read More Creeping flow around a sphere is defined, when particle Reynolds number is
CHEMICAL ENGINEERING | Chemical Engineering Thermodynamics

Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

Question: Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.
[A].

0
[B].
273
[C].
25
[D].
none of these

Answer: Option A

Explanation:

No answer description available for this question.

Read More Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.
CHEMICAL ENGINEERING | Chemical Engineering Thermodynamics

Boyle’s law for gases states that

Question: Boyle’s law for gases states that
[A].

, when temperature is constant.
[B].
, when temperature & mass of the gas remain constant.
[C].
P ∝ V, at constant temperature & mass of the gas.
[D].
= constant, for any gas.

Answer: Option B

Explanation:

No answer description available for this question.

Read More Boyle’s law for gases states that
CHEMICAL ENGINEERING | Chemical Engineering Basics

Cascade control is

Question: Cascade control is
[A].

the continuous adjustment of the set point index of an automatic control loop by a primary (master) controller.
[B].
used when changes in process conditions cause serious upsets in the controlled variable.
[C].
useful to control flow from temperature.
[D].
all ‘a’, ‘b’ & ‘c’.

Answer: Option D

Explanation:

No answer description available for this question.

Read More Cascade control is
CHEMICAL ENGINEERING | Chemical Reaction Engineering

If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatlier principle)

Question: If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatlier principle)
[A].

decreases
[B].
increases
[C].
remains unaltered
[D].
changes unpredictably.

Answer: Option A

Explanation:

No answer description available for this question.

Read More If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatlier principle)

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