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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.

Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?

A Segar cones

B Muffles for muffle furnaces

C Insulating bricks

D Crucibles used for melting of high purity metals

Review Detailed Answer

Correct Answer: Crucibles used for melting of high purity metals

Cold crushing strength of ordinary fireclay brick is about 950 kg/cm2. On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as ______________ kg/cm2?

A 450

B 250

C 150

D 65

Review Detailed Answer

Correct Answer: 65

Walls, roofs & combustion chambers of annealing furnaces are made of ______________ bricks?

A High duty fireclay

B Silica

C Mullite

D Carborundum

Review Detailed Answer

Correct Answer: High duty fireclay

With increasing alumina content, the fusion point of high alumina refractories__________________?

A Increases

B Decreases

C Remain constant

D May increase or decrease; depends on its alumina content

Review Detailed Answer

Correct Answer: Increases

Vacuum steel degassing units are lined with__________________?

A Silica bricks

B Low duty firebricks

C High alumina bricks

D Graphite blocks

Review Detailed Answer

Correct Answer: High alumina bricks

Chromite refractories are_____________________?

A Acidic refractory

B Neutral refractory

C Basic refractory

D Fired at a temperature of 600°C only

Review Detailed Answer

Correct Answer: Neutral refractory

Thoria__________________?

A Has high fusion temperature (> 3000°C) but poor resistance to thermal shock

B Has high resistance to basic slags

C Which is expensive & radioactive, is used in crucibles for melting high purity metals

D All A., B. and C.

Review Detailed Answer

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

Cold crushing strength of a refractory does not depend upon its ____________________?

A Shape

B Composition

C Firing temperature

D Texture

Review Detailed Answer

Correct Answer: Shape

Which is the stable form of silica between 1470°C and the melting point 1713°C ?

A Cristobalite

B Tridymite

C Quartz

D None of these

Review Detailed Answer

Correct Answer: Cristobalite

Maximum safe working temperature for fireclay bricks is about __________ °C?

A 1150

B 1300

C 1450

D 1550

Review Detailed Answer

Correct Answer: 1550

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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

All Topics 9594

All Topics 9594

Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of______________?

Cold crushing strength of ordinary fireclay brick is about 950 kg/cm2. On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as ______________ kg/cm2?

Walls, roofs & combustion chambers of annealing furnaces are made of ______________ bricks?

With increasing alumina content, the fusion point of high alumina refractories__________________?

Vacuum steel degassing units are lined with__________________?

Chromite refractories are_____________________?

Thoria__________________?

Cold crushing strength of a refractory does not depend upon its ____________________?

Which is the stable form of silica between 1470°C and the melting point 1713°C ?

Maximum safe working temperature for fireclay bricks is about __________ °C?