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Chemical Engineering MCQs with Explanations

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2731Chemical EngineeringMedium

A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that ________ in the two reactors?

ABoth conversion as well as concentration are same

BConversion in both will be the same but concentrations will be different

CNone of these

DBoth the conversion as well as concentrations will be different

Correct answer

B. Conversion in both will be the same but concentrations will be different

Explanation

The correct answer is Conversion in both will be the same but concentrations will be different.

2732Chemical EngineeringMedium

Liners of a ball mill are never made of________?

ACast iron

BLead

CAlloy steel

DRubber or ceramic material

Correct answer

B. Lead

Explanation

The correct answer is Lead.

2733Chemical EngineeringMedium

Cp – Cv for an ideal gas is equal to________?

AR/2

B3R

C2R

Correct answer

D. R

Explanation

The correct answer is R.

2734Chemical EngineeringMedium

Coal based fertilizer plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa)?

AUse coal as filler in fertilizer

BUse coal as conditioner in fertilizer

CGasify coal to get hydrogen from coal gas

DUse coal for heating purpose

Correct answer

C. Gasify coal to get hydrogen from coal gas

Explanation

The correct answer is Gasify coal to get hydrogen from coal gas.

2735Chemical EngineeringMedium

Major loss in sudden contraction in pipe flow is due to ________?

AFlow contraction

BExpansion of flow after sudden contraction

CNone of these

DBoundary friction

Correct answer

A. Flow contraction

Explanation

The correct answer is Flow contraction.

2736Chemical EngineeringMedium

First experimental observation of nuclear fission was done by ________?

ARutherford

BPlane

CFermi

DHahn and Strassmann

Correct answer

C. Fermi

Explanation

The correct answer is Fermi.

2737Chemical EngineeringMedium

Which of the following coals has the highest calorific value?

ASub-bituminous

BLignite

CAnthracite

DPeat

Correct answer

C. Anthracite

Explanation

The correct answer is Anthracite.

2738Chemical EngineeringMedium

Addition polymerisation is not involved in the manufacture of________?

APolyhexamethylene adipamide

BPolystyrene

CLow density polythene

DPoly vinyl chloride

Correct answer

A. Polyhexamethylene adipamide

Explanation

The correct answer is Polyhexamethylene adipamide.

2739Chemical EngineeringMedium

For an ideal liquid solution, which of the following is unity?

AActivity co-efficient

BFugacity

CActivity

DFugacity co-efficient

Correct answer

A. Activity co-efficient

Explanation

The correct answer is Activity co-efficient.

2740Chemical EngineeringMedium

Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)?

B0.5 D

C2 D

D1.5 D

Correct answer

A. D

Explanation

The correct answer is D.

A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that ________ in the two reactors?

ABoth conversion as well as concentration are same

BConversion in both will be the same but concentrations will be different

CNone of these

DBoth the conversion as well as concentrations will be different

Correct answer

B. Conversion in both will be the same but concentrations will be different

Explanation

The correct answer is Conversion in both will be the same but concentrations will be different.