MCQs

Chemical Engineering MCQs with Explanations

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2031Chemical EngineeringMedium

Rayon is superior to cotton in making gauge for wound treatment, because rayon________?

ABoth B. and C.

BCan absorb over 90% of its own weight of water

CIs a synthetic polymer

DDoes not stick to the wound unlike cotton

Correct answer

D. Does not stick to the wound unlike cotton

Explanation

The correct answer is Does not stick to the wound unlike cotton.

2032Chemical EngineeringMedium

Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?

A12.6 H

B14.6 H

D13.6 H

Correct answer

A. 12.6 H

Explanation

The correct answer is 12.6 H.

2033Chemical EngineeringMedium

Differential manometer measures the________?

AGauge pressure

BPressure difference

CAbsolute pressure

DPressure gradient

Correct answer

B. Pressure difference

Explanation

The correct answer is Pressure difference.

2034Chemical EngineeringMedium

1st law of thermodynamics is nothing but the law of conservation of________?

AMomentum

BNone of these

CEnergy

DMass

Correct answer

C. Energy

Explanation

The correct answer is Energy.

2035Chemical EngineeringMedium

Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a ________?

AManometer

BNone of these

CRotameter

DPitot tube

Correct answer

D. Pitot tube

Explanation

The correct answer is Pitot tube.

2036Chemical EngineeringMedium

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at ________ °C?

A90-100

B250-300

C< 0

D15-30

Correct answer

D. 15-30

Explanation

The correct answer is 15-30.

2037Chemical EngineeringMedium

In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3), the value of the equilibrium constant depends on the________?

ATotal pressure of the system

BVolume of the reactor

CInitial concentration of N2 and H2

DTemperature

Correct answer

D. Temperature

Explanation

The correct answer is Temperature.

2038Chemical EngineeringMedium

Which of the following remains constant during evaporative cooling process with recirculated water supply?

APartial pressure of vapour

BWet bulb temperature

CNone of these

DRelative humidity

Correct answer

B. Wet bulb temperature

Explanation

The correct answer is Wet bulb temperature.

2039Chemical EngineeringMedium

The inlet pressure in a constant rate filtration________?

ARemains constant

BNone of these

CIncreases continuously

DDecreases gradually

Correct answer

C. Increases continuously

Explanation

The correct answer is Increases continuously.

2040Chemical EngineeringMedium

Pick out the wrong unit conversion of heat transfer co-efficient?

A1 BTU/ft2.hr.°F = 4.88 kcal/m2.hr.°C = 20.44 kJ/m2.hr°C = 5.678 W/m2.°C

B1 W/m2.°C = 0.1761 BTU/ft2.hr.°F.

C1 kcal/m2.hr.°C = 0.2048 BTU/ft2.hr. °F. = 1.163 W/m2.°K

D1 kcal/m2.hr.°K = 1.163 W/m2.°C

Correct answer

D. 1 kcal/m2.hr.°K = 1.163 W/m2.°C

Explanation

The correct answer is 1 kcal/m2.hr.°K = 1.163 W/m2.°C.

Pick out the wrong unit conversion of heat transfer co-efficient?

A1 BTU/ft2.hr.°F = 4.88 kcal/m2.hr.°C = 20.44 kJ/m2.hr°C = 5.678 W/m2.°C

B1 W/m2.°C = 0.1761 BTU/ft2.hr.°F.

C1 kcal/m2.hr.°C = 0.2048 BTU/ft2.hr. °F. = 1.163 W/m2.°K

D1 kcal/m2.hr.°K = 1.163 W/m2.°C

Correct answer

D. 1 kcal/m2.hr.°K = 1.163 W/m2.°C

Explanation

The correct answer is 1 kcal/m2.hr.°K = 1.163 W/m2.°C.