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Chemical Engineering MCQs with Explanations

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1281Chemical EngineeringMedium

________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low?

Bucket

BA combination of separating & throttling

CThrottling

DSeparating

Correct answer

B. A combination of separating & throttling

Explanation

The correct answer is A combination of separating & throttling.

1282Chemical EngineeringMedium

Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be________?

ANone of these

BSaturated

CSuperheated

DWet

Correct answer

C. Superheated

Explanation

The correct answer is Superheated.

1283Chemical EngineeringMedium

If CO2 is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as________?

AO2

BN2

CCO

DSO2

Correct answer

D. SO2

Explanation

The correct answer is SO2.

1284Chemical EngineeringMedium

If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be ________ days?

A30

C20

D10

Correct answer

D. 10

Explanation

The correct answer is 10.

1285Chemical EngineeringMedium

Nitrogen in coal________?

AComes from protein in parent vegetable matter

BIs recovered as ammonia during its carbonisation

CIs present upto 1-2%

DAll A., B. and C.

Correct answer

D. All A., B. and C.

Explanation

The correct answer is All A., B. and C..

1286Chemical EngineeringMedium

Which of the following is a Naphthene?

AAcetylene

BButene

CButadiene

DCyclohexane

Correct answer

D. Cyclohexane

Explanation

The correct answer is Cyclohexane.

1287Chemical EngineeringMedium

Hypersorption refers to a ________ process?

AMoving bed absorption

BFixed bed adsorption

CFixed bed absorption

DMoving bed adsorption

Correct answer

D. Moving bed adsorption

Explanation

The correct answer is Moving bed adsorption.

1288Chemical EngineeringMedium

Which of the following ratios defines the recycle ratio in a chemical process?

ANone of these

BGross feed stream/recycle feed stream

CRecycle stream/gross feed stream

DRecycle stream/fresh feed stream

Correct answer

D. Recycle stream/fresh feed stream

Explanation

The correct answer is Recycle stream/fresh feed stream.

1289Chemical EngineeringMedium

Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is ________?

A68

B54

C12

D36

Correct answer

D. 36

Explanation

The correct answer is 36.

1290Chemical EngineeringMedium

Choose the correct equation?

ANu = (Re) (Pr) (St)

BNu = (Re) (Pr)

CNu = (Pr) (St)

DNu = (Re) (Pr) (Gz)

Correct answer

A. Nu = (Re) (Pr) (St)

Explanation

The correct answer is Nu = (Re) (Pr) (St).

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