MCQs

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.

44%

3,640 of 8,342MCQs reviewed

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

3641Chemical EngineeringMedium

Inorganic impurities causing water pollution is ________?

AProtein

BSalts of metals

CCarbohydrates

DFats

Correct answer

B. Salts of metals

Explanation

The correct answer is Salts of metals.

3642Chemical EngineeringMedium

At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________?

A12

C10

Correct answer

B. 8

Explanation

The correct answer is 8.

3643Chemical EngineeringMedium

Pour point and freezing point is equal for________?

APetrol

BCrude petroleum

CWater

DDiesel

Correct answer

C. Water

Explanation

The correct answer is Water.

3644Chemical EngineeringMedium

The bolt is subjected to ________ when the nut is tightened by putting the washer beneath it?

ATension

BCompression

CShear

DBending & tension

Correct answer

A. Tension

Explanation

The correct answer is Tension.

3645Chemical EngineeringMedium

Viscosity index of a lubricating oil________?

AShould be low

BNone of these

CIs the measure of its flash point

DIs the measure of variation of viscosity with temperature

Correct answer

D. Is the measure of variation of viscosity with temperature

Explanation

The correct answer is Is the measure of variation of viscosity with temperature.

3646Chemical EngineeringMedium

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is________?

ASlightly less

BSlightly more

CSame

DMuch more

Correct answer

B. Slightly more

Explanation

The correct answer is Slightly more.

3647Chemical EngineeringMedium

Pick out the wrong statement?

ARefractories used in muffle furnace should have low thermal conductivity

BFor reducing spalling tendency, the refractory should be well fired and its porosity should be

CThe electrical resistivity of refractories drops rapidly with rise in temperature

DRefractoriness under load (RUL) of a refractory is always less than its refractoriness

Correct answer

A. Refractories used in muffle furnace should have low thermal conductivity

Explanation

The correct answer is Refractories used in muffle furnace should have low thermal conductivity.

3648Chemical EngineeringMedium

Protective gas used in the annealing furnace for steel coil comprises of________?

A100% CO

B100% H2

C5% H2 + 9% N2

D95% N2 + 5% H2

Correct answer

D. 95% N2 + 5% H2

Explanation

The correct answer is 95% N2 + 5% H2.

3649Chemical EngineeringMedium

The atomic number of an element is equal to the number of ________ present in its atom?

AProtons

BElectrons

CNeutrons

DEither B. or C.

Correct answer

D. Either B. or C.

Explanation

The correct answer is Either B. or C..

3650Chemical EngineeringMedium

Which of the following is not used as filter aid?

AAsbestos

BPurified wood cellulose

CDiatomaceous earth

DRice husk

Correct answer

D. Rice husk

Explanation

The correct answer is Rice husk.

Pick out the wrong statement?

ARefractories used in muffle furnace should have low thermal conductivity

BFor reducing spalling tendency, the refractory should be well fired and its porosity should be

CThe electrical resistivity of refractories drops rapidly with rise in temperature

DRefractoriness under load (RUL) of a refractory is always less than its refractoriness

Correct answer

A. Refractories used in muffle furnace should have low thermal conductivity

Explanation

The correct answer is Refractories used in muffle furnace should have low thermal conductivity.