☾★Academy of PakistanTest & Learning

804Active Users

☾★Academy of PakistanTest & Learning

Home PakMcqs Past Papers Internships Pakistan Jobs Scholarships PDFs About Us

804Active Users

Home PakMcqs Past Papers Internships Pakistan Jobs Scholarships Submit MCQs Profile

Chemical Engineering MCQs with Explanations

Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.

23%

1,900 of 8,342MCQs reviewed

Study Mode — explanations are always visiblePrefer a timed quiz? Start test

1901Chemical EngineeringMedium

Maximum size of the raschig rings used in a packed tower is about ________ of the column diameter?

1/10th

B1/50th

C1/20th

D1/30th

Correct answer

D. 1/30th

Explanation

The correct answer is 1/30th.

1902Chemical EngineeringMedium

DDT should not be allowed to come in contact with iron (during its manufacture) to ________?

AAvoid its decomposition

BAchieve non-hygroscopic property

CPrevent sulphonation of the monochlorobenzene by the acid catalyst

DNone of these

Correct answer

A. Avoid its decomposition

Explanation

The correct answer is Avoid its decomposition.

1903Chemical EngineeringMedium

For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will________?

AData insufficient, can’t be predicted

BDecrease

CRemain same

DIncrease

Correct answer

D. Increase

Explanation

The correct answer is Increase.

1904Chemical EngineeringMedium

In case of constant underflow extraction operation, the ________ at all solute concentration?

ABoth A. & B.

BSolids are drained to the same extent

CNeither A. nor B.

DRatio of the insoluble to solution is constant

Correct answer

A. Both A. & B.

Explanation

The correct answer is Both A. & B..

1905Chemical EngineeringMedium

Gain margin is equal to the________?

AGain in P-I controller

BReciprocal of amplitude ratio

CAmplitude ratio

DGain in P controller

Correct answer

B. Reciprocal of amplitude ratio

Explanation

The correct answer is Reciprocal of amplitude ratio.

1906Chemical EngineeringMedium

Performance number of a liquid fuel is related to its ________?

AWax content

BSulphur content

CKnocking tendency

DSpontaneous ignition temperature

Correct answer

D. Spontaneous ignition temperature

Explanation

The correct answer is Spontaneous ignition temperature.

1907Chemical EngineeringMedium

Which of the following liquid metals has the highest thermal conductivity?

AMercury

BMolten potassium

CMolten lead

DMolten sodium

Correct answer

D. Molten sodium

Explanation

The correct answer is Molten sodium.

1908Chemical EngineeringMedium

Aluminium as a material of construction suffers from the disadvantage of________?

AVery low strength to weight ratio

BVery high cost

CRather low tensile strength

DScarce availability

Correct answer

C. Rather low tensile strength

Explanation

The correct answer is Rather low tensile strength.

1909Chemical EngineeringMedium

Dampers are located________?

AAfter the I.D. fan

BAnywhere after the I.D. fan

CNear the top of the chimney

DBefore the I.D fan

Correct answer

D. Before the I.D fan

Explanation

The correct answer is Before the I.D fan.

1910Chemical EngineeringMedium

At the point of boundary layer separation in fluid flow, the ________?

ADensity variation is maximum

BShear stress is maximum

CVelocity gradient is flat

DShear stress is zero

Correct answer

B. Shear stress is maximum

Explanation

The correct answer is Shear stress is maximum.

PreviousNext

Study this subject

Browse all 8,342 questions in groups of ten. Each question also has a permanent page that Google and students can open directly.

Quick facts

Questions8,342

Study pages835

Current page191

How to learn

Read the question before viewing choices.
Compare the correct answer with alternatives.
Use the quiz after completing a study page.