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Chemical Engineering MCQs with Explanations

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471Chemical EngineeringMedium

A steel member used in the furnace construction to take the thrust of the brickwork is called________?

ABuckstay

BBaffle

CArmouring

DBreast wall

Correct answer

A. Buckstay

Explanation

The correct answer is Buckstay.

472Chemical EngineeringMedium

In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in________?

AReducing the axial mixing

BAll A, B & C.

CMaintaining the concentration difference between the two phases

DIncreasing the rate of extraction

Correct answer

B. All A, B & C.

Explanation

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

473Chemical EngineeringMedium

Flow rate through an orifice is ________ the pressure differential?

AInversely proportional to the square of

BProportional to

CProportional to the square root of

DInversely proportional to the square root of

Correct answer

C. Proportional to the square root of

Explanation

The correct answer is Proportional to the square root of.

474Chemical EngineeringMedium

Humid volume is the total volume in m3 of 1 kg of ________?

AVapour laden gas at 1 atm. and gas temperature

BGas plus its accompanying vapour at 1 atm. and room temperature

CGas plus its accompanying vapour at 1 atm. and gas temperature

DVapour laden gas at 1 atm. and room temperature

Correct answer

C. Gas plus its accompanying vapour at 1 atm. and gas temperature

Explanation

The correct answer is Gas plus its accompanying vapour at 1 atm. and gas temperature.

475Chemical EngineeringMedium

Heat requirement for decomposition of a compound into its elements is ________ that is evolved during the formation of that compound from its elements?

AThe same

BGreater than

CLess than

DDifferent than

Correct answer

A. The same

Explanation

The correct answer is The same.

476Chemical EngineeringMedium

Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of ________?

AButane & ethane

BMethane & ethane

CPropane & butane

DMethane & carbon monoxide

Correct answer

C. Propane & butane

Explanation

The correct answer is Propane & butane.

477Chemical EngineeringMedium

Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to ________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance)?

A1/μ2

B√μ

C1/√μ

Correct answer

C. 1/√μ

Explanation

The correct answer is 1/√μ.

478Chemical EngineeringMedium

Safety valves are provided in chemical equipments to guard against excessive________?

ATemperature

BTurbulence

CNoise

DPressure/pressure fluctuation

Correct answer

D. Pressure/pressure fluctuation

Explanation

The correct answer is Pressure/pressure fluctuation.

479Chemical EngineeringMedium

Which of the following is not a theory of homogeneous reaction?

AChain reaction theory

BRadiation hypothesis

CCollision theory and activated complex theory

DNone of these

Correct answer

D. None of these

Explanation

The correct answer is None of these.

480Chemical EngineeringMedium

A common disinfectant used in village wells for disinfection of water is ________?

ABromine

BFree chlorine

CPotassium permanganate

DIodine

Correct answer

C. Potassium permanganate

Explanation

The correct answer is Potassium permanganate.

Humid volume is the total volume in m3 of 1 kg of ________?

AVapour laden gas at 1 atm. and gas temperature

BGas plus its accompanying vapour at 1 atm. and room temperature

CGas plus its accompanying vapour at 1 atm. and gas temperature

DVapour laden gas at 1 atm. and room temperature

Correct answer

C. Gas plus its accompanying vapour at 1 atm. and gas temperature

Explanation

The correct answer is Gas plus its accompanying vapour at 1 atm. and gas temperature.