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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

A cylindrical pressure vessel of volume 6 πm3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to________________?

A 5 mm

B 6 mm

C 8 mm

D 10 mm

Review Detailed Answer

Correct Answer: 10 mm

A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of_________________?

A 2

B 20.8

C 20.2

D None of these

Review Detailed Answer

Correct Answer: 2

Thin spherical shells subjected to internal pressure, develop ______________ stresses?

A Radial

B Circumferential

C Both A. & B.

D Neither A. nor B.

Review Detailed Answer

Correct Answer: Radial

Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about ______________ mm?

A 10

B 50

C 100

D 200

Review Detailed Answer

Correct Answer: 10

Optimum reflux ratio in a continuous distillation column is determined by the__________________?

A Maximum permissible vapour velocity

B Flooding limit of the column

C Total cost consideration (fixed cost of the column plus the cooling water & steam cost)

D None of these

Review Detailed Answer

Correct Answer: Total cost consideration (fixed cost of the column plus the cooling water & steam cost)

In a rotary drier, the average retention time of solid is (where Z = length of the drier, metres ρ = apparent solid density, kg/m3 L = flow rate of dry solids, kg/see. m2 drier crosssection H = hold up of solid.) ?

A Z.H.ρ/L

B L/Z.H.ρ

C H.ρ/L

D Z.H/ρL

Review Detailed Answer

Correct Answer: Z.H.ρ/L

Lug support is meant for supporting _______________ vessels?

A Large horizontal cylindrical

B Tall but empty

C Small

D Thick walled tall

Review Detailed Answer

Correct Answer: Small

The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)_________________?

A 0.5 d

B 0.75 d

C d

D 2 d

Review Detailed Answer

Correct Answer: d

Poisson’s ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson’s ratio for structural and pressure vessel steel may be taken as ____________________?

A 0.01

B 0.3

C 0.75

D 0.95

Review Detailed Answer

Correct Answer: 0.3

Steam is preferred to be used as a heating medium in heat exchangers, because of its_________________?

A Low cost

B High latent heat

C Non-corrosive condensate

D High film co-efficient

Review Detailed Answer

Correct Answer: High latent heat

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of_________________?

Thin spherical shells subjected to internal pressure, develop ______________ stresses?

Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about ______________ mm?

Optimum reflux ratio in a continuous distillation column is determined by the__________________?

In a rotary drier, the average retention time of solid is (where Z = length of the drier, metres ρ = apparent solid density, kg/m3 L = flow rate of dry solids, kg/see. m2 drier crosssection H = hold up of solid.) ?

Lug support is meant for supporting _______________ vessels?

The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)_________________?

Poisson’s ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson’s ratio for structural and pressure vessel steel may be taken as ____________________?

Steam is preferred to be used as a heating medium in heat exchangers, because of its_________________?