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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.

Pick out the wrong statement ?

A In a flanged and standard dished head, the crown radius is ≤ shell outside diameter

B In a flanged and shallow dished head, the crown radius is > shell outside diameter

C Flat head covers are most suitable for larger vessels operating at very high pressure

D Flanged only head is a type of flat head in which gradual change in the shape at the centre results in reduced local stresses

Review Detailed Answer

Correct Answer: Flat head covers are most suitable for larger vessels operating at very high pressure

Normally, the length to diameter ratio of rotary dryers varies from 4 to 10 and for its economic operation; the number of transfer units (NTU) for such dryers varies from ?

A 1.5-2.5

B 3.5-5.5

C 7.5-10.0

D 10-15

Review Detailed Answer

Correct Answer: 1.5-2.5

Filtration rate is affected by the________________?

A Pressure drop across the cake & filter medium

B Cake & filter medium resistance

C Area of filtering surface & the viscosity of filtrate

D All A., B. and C.

Review Detailed Answer

Correct Answer: All A., B. and C.

_____________ shaped roof is the most commonly used roof for cylindrical storage tanks?

A Conical

B Flat

C Dome

D Umbrella

Review Detailed Answer

Correct Answer: Conical

The minimum shell thickness for tank ≤ 15 metres diameter is limited to _______________ mm, for reasons of elastic stability?

A 2

B 5

C 10

D 15

Review Detailed Answer

Correct Answer: 5

A ‘rupture disc’ is provided in chemical equipments as an accessory meant for ___________________?

A Relieving excess pressure

B Creating turbulence

C Enhancing mixing rate

D Avoiding vortex formation

Review Detailed Answer

Correct Answer: Relieving excess pressure

Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, ζ = yield strength and E = modulus of elasticity) ?

A E

B ζ

C ζ/E

D E/ζ

Review Detailed Answer

Correct Answer: E

Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about _______________ mm Hg (referred to a 760 mm mercury barometer)?

A 250

B 450

C 650

D 750

Review Detailed Answer

Correct Answer: 650

A/an _______________ is used for changing the direction of a pipeline?

A Elbow

B Union

C Flange

D Disc compensator

Review Detailed Answer

Correct Answer: Elbow

In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be_________________?

A Same as that for fluid flow

B Less than that for fluid flow

C More than that for fluid flow

D D2 – D1 (D1 and D2 are I.D. of inner and outer pipes respectively)

Review Detailed Answer

Correct Answer: More than that for fluid flow

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Pick out the wrong statement ?

Normally, the length to diameter ratio of rotary dryers varies from 4 to 10 and for its economic operation; the number of transfer units (NTU) for such dryers varies from ?

Filtration rate is affected by the________________?

_____________ shaped roof is the most commonly used roof for cylindrical storage tanks?

The minimum shell thickness for tank ≤ 15 metres diameter is limited to _______________ mm, for reasons of elastic stability?

A ‘rupture disc’ is provided in chemical equipments as an accessory meant for ___________________?

Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, ζ = yield strength and E = modulus of elasticity) ?

Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about _______________ mm Hg (referred to a 760 mm mercury barometer)?

A/an _______________ is used for changing the direction of a pipeline?

In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be_________________?