List of top Chemical, Thermal and Polymer Engineering Questions

Arrange the following based on the particle size that are separated out from a solution.
A. Ultrafiltration
B. Sedimentation
C. Filter paper (Whatman 40)
D. Press filtration
Choose the correct answer from the options given below:

Arrange the following based on enthalpy content at $100^{\circ}C$ per kg of water.
A. Saturated vapor
B. Superheated vapor
C. Vapor with 95% quality
D. Enthalpy of vaporization
Choose the correct answer from the options given below:

Lubricating oil, which has been used is re-refined as per sets mentioned below.
A. Removal of impurities and dehydration.
B. Blending and product finishing.
C. Segregation and collection.
D. Base oil recovery and distillation.
Choose the correct answer from the options given below:

Please arrange the following according to escalating Mach number.
A. Supersonic
B. Transonic
C. Hypersonic
D. Subsonic
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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The FTIR spectrum of a compound is generally used to identify the functional groups present in it.
Reason R: As each functional groups have different elements and chemical-bonds as compared to main elements present in it.
In the light of the above statements, choose the most appropriate answer from the options given below:

During batch distillation composition change occurs.
A. Heavy component increases in still
B. Distillate formed from condensation of vapor
C. Vapor formation occurs in still
D. As time passes composition of distillate decreases
Choose the correct answer from the options given below:

How does heat transfer enhance due to turbulence?
A. Decrease in thermal resistance.
B. Increase in convective coefficient.
C. Mixing is induced by velocity change.
D. Thinning of boundary layer.
Choose the correct answer from the options given below:

Enzyme regulation by feedback inhibition.
A. Reduced enzyme activity.
B. Accumulation of end product.
C. End product bind to allosteric site.
D. Decrease in intermediate formation.
Choose the correct answer from the options given below:

Assertion A: The ductility of metals is affected by dislocations of atomic structure, it increases the ductility of metals.
Reason R: Dislocations mostly occur at the lower stress than the predicted shear strength.
In the light of the above statements, choose the most appropriate answer:

Assertion A: PVC is a thermoplastic.
Reason R: Plasticizers are used to make PVC flexible.
In the light of the above statements, choose the most appropriate answer:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Liquid fuels have higher calorific value than solid fuels.
Reason R: Solid fuels ignite at lower temperature than liquid fuels.
In the light of the above statements, choose the most appropriate answer from the options given below:

Assertion A: The physical properties and fluid velocity of the system influences the mass transfer coefficient.
Reason R: Flow condition impact the boundary layer thickness which controls the convective mass transfer.
In the light of the above statements, choose the most appropriate answer:

Assertion A: An increase of temperature of a chemical reaction at constant pressure, the equilibrium value of the reaction shifts in the direction in which the heat of reaction absorbed.
Reason R: To minimize the Gibbs free energy change due to increase in temperature, the heat of reaction needs to be absorbed by shifting the equilibrium value.
In the light of the above statements, choose the most appropriate answer:

Assertion A: Below glass transition temperature polymers behave as a glass and above glass transition temperature polymers behave as an elastomer.
Reason R: Below glass transition temperature polymer chain becomes rigid and behaves like a glass; above glass transition temperature polymer chain segments becomes flexible as a result polymers behave like elastomer.
In the light of the above statements, choose the most appropriate answer:

Assertion A: Bingham plastic fluid shows solid characteristics when stress applied is low.
Reason R: Before beginning of flow Bingham plastic fluid have finite yield stress.
In the light of the above statements, choose the most appropriate answer:

Assertion A: Microbial growth is increased when agitation speed rises.
Reason R: Oxygen mass transfer improves but shear damage to cell also occurs.
In the light of the above statements, choose the most appropriate answer:

Assertion A: Fluid property do not impact the heat transfer coefficient of natural convection.
Reason R: Density difference occurring in fluid impact the buoyancy forces which governs natural convection.
In the light of the above statements, choose the most appropriate answer:

Assertion A: Environmental pollution load is decreased when fly ash is added during cement production.
Reason R: Fly ash is waste which displays excellent property to reduce clinker which results in less amount of raw material.
In the light of the above statements, choose the most appropriate answer:

Write down the product compound for the following reaction:

Zymase catalyst is present in Yeast. Zymase decomposes to ethanol and carbon dioxide by decomposition of

At 700K, the value of $K_{c}$ for the following reaction is 64: $H_{2}(g)+I_{2}(g)\rightleftharpoons2HI(g)$. If 0.5 mole of $H_{2}(g)$ and 0.5 mole of $I_{2}(g)$ were mixed at 700K and allowed to reach equilibrium, the amount of HI formed by mole is:

Pick the wrong statement.

The theoretical air required for the complete combustion of 5 kg of ethylene gas is: [Air: 78% $N_{2}$ and 22% $O_{2}$ by mass]

A producer gas, used as an industrial fuel gas with the following composition by volume: $H_{2}=28%$, $CO=12%$, $CH_{4}=2%$, $CO_{2}=16%$ and $N_{2}=42%$. Find the volume of air required for the complete combustion of $1~m^{3}$ of this gas [Air contains 21% $O_{2}$ by volume].

Plasticizers are added in rubber compounding and processing to improve