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Chemical Engineering MCQs with Explanations

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1321Chemical EngineeringMedium

The function of manholes provided in the shell of a distillation column is to ________?

Keep a check on the liquid gradient over the plate by direct visual observation

BGuard against foaming & entrainment by dumping antifoaming agent through it

CGive access to the individual trays for cleaning, maintenance and installation

DAll A., B. and C.

Correct answer

C. Give access to the individual trays for cleaning, maintenance and installation

Explanation

The correct answer is Give access to the individual trays for cleaning, maintenance and installation.

1322Chemical EngineeringMedium

Steam side heat transfer co-efficient in an evaporator is in the range of ________ kcal/hr.m2°C?

A100-500

B1000-1500

C5000-15000

D10-50

Correct answer

C. 5000-15000

Explanation

The correct answer is 5000-15000.

1323Chemical EngineeringMedium

Neutrons are present in all atoms except that of ________?

BHe

CAr

Correct answer

A. H

Explanation

The correct answer is H.

1324Chemical EngineeringMedium

Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?

AMercury in glass thermometer

BFilled system thermometer

CRadiation/infrared pyrometer

DThermo electric pyrometer

Correct answer

C. Radiation/infrared pyrometer

Explanation

The correct answer is Radiation/infrared pyrometer.

1325Chemical EngineeringMedium

Thermal well made of ________ gives the fastest speed of response, while measuring temperature by thermocouples?

AInconel

BNichrome

CVycor (a glass)

DSteel

Correct answer

C. Vycor (a glass)

Explanation

The correct answer is Vycor (a glass).

1326Chemical EngineeringMedium

Presence of nitrates in water in excess of 50 ppm causes________?

AMethemoglobinemia

BAsphyxiation

CGastroenteritis

DTooth decay

Correct answer

A. Methemoglobinemia

Explanation

The correct answer is Methemoglobinemia.

1327Chemical EngineeringMedium

Pressure drop in a packed bed for laminar flow is given by the ________ equation?

ALeva’s

BBlake-Plummer

CKozeny-Carman

DFanning friction factor

Correct answer

C. Kozeny-Carman

Explanation

The correct answer is Kozeny-Carman.

1328Chemical EngineeringMedium

Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid________?

AIs different for different fluids

BIs independent of the specific weight of the fluid

CIs at the centroid of the plane surface

DLies above the centroid of the plane surface

Correct answer

B. Is independent of the specific weight of the fluid

Explanation

The correct answer is Is independent of the specific weight of the fluid.

1329Chemical EngineeringMedium

In case of gases, the binary diffusivity is proportional to (where, P = pressure)?

A1/P

Correct answer

A. 1/P

Explanation

The correct answer is 1/P.

1330Chemical EngineeringMedium

Reaction of ________ acid with phosphate rock produces superphosphates?

APhosphoric

BHydrochloric

CSulphuric

DNitric

Correct answer

C. Sulphuric

Explanation

The correct answer is Sulphuric.

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