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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.

Which of the following has the lowest viscosity (at a given temperature) of all ?

A Naphtha

B Kerosene

C Diesel

D Lube oil

Review Detailed Answer

Correct Answer: Naphtha

Presence of sulphur in gasoline___________________?

A Leads to corrosion

B Increases lead susceptibility

C Decreases gum formation

D Helps during stabilisation

Review Detailed Answer

Correct Answer: Leads to corrosion

Higher viscosity of lubricating oil usually signifies_______________________?

A Lower Reid vapour pressure

B Higher acid number

C Higher flash point and fire point

D Lower flash point and fire point

Review Detailed Answer

Correct Answer: Higher flash point and fire point

Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ?

A Diesel

B Gasoline

C Atmospheric gas oil

D Vacuum gas oil

Review Detailed Answer

Correct Answer: Atmospheric gas oil

Smoke volatility index is equal to smoke point plus______________________?

A 0.42 × (% distilled at 204°C)

B 5 mm

C 0.84 × (% distilled at 204°C)

D 10 mm approximately

Review Detailed Answer

Correct Answer: 0.42 × (% distilled at 204°C)

Diesel index (an alternative index for expressing the quality of diesel) is_______________?

A Determined by using a test engine

B Not related to aniline point

C Equal to cetane number plus 3

D All A., B. & C.

Review Detailed Answer

Correct Answer: Equal to cetane number plus 3

Catalyst used in the catalytic cracking is_____________________?

A Silica-alumina

B Silica gel

C Vanadium pentoxide

D Nickel

Review Detailed Answer

Correct Answer: Silica-alumina

For gasoline, the flash point (<50°C) is determined by the______________________?

A Abel apparatus

B Pensky-Marten’s apparatus

C Saybolt chromometer

D None of these

Review Detailed Answer

Correct Answer: None of these

Main constituent of natural gas is___________________?

A CH4

B C2H2

C C2H4

D C2H6

Review Detailed Answer

Correct Answer: CH4

Crude oil is subjected to vacuum distillation in the last stage, because_________________?

A High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may

B Lighter/low boiling products are prone to thermal decomposition

C High purity products can be obtained thereby

D None of these

Review Detailed Answer

Correct Answer: High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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All Topics 9594

Which of the following has the lowest viscosity (at a given temperature) of all ?

Presence of sulphur in gasoline___________________?

Higher viscosity of lubricating oil usually signifies_______________________?

Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API) ?

Smoke volatility index is equal to smoke point plus______________________?

Diesel index (an alternative index for expressing the quality of diesel) is_______________?

Catalyst used in the catalytic cracking is_____________________?

For gasoline, the flash point (<50°C) is determined by the______________________?

Main constituent of natural gas is___________________?

Crude oil is subjected to vacuum distillation in the last stage, because_________________?