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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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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.

All Topics  9594

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about ____________________ °C?
A 370
B 340
C 320
D 300
Correct Answer: 370
Spark plug is provided in a/an_________________?
A Engine having carburettor
B Diesel engine
C Compression ignition engine
D Both B. & C.
Correct Answer: Engine having carburettor
Pick out the correct statement about the condensation?
A Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
B Suitable coating or vapour additive is used to promote film wise condensation
C If a condensing liquid does not wet the surface dropwise, even then condensation will take
D Reynolds number of condensing liquid is based on its mass flow rate
Correct Answer: Suitable coating or vapour additive is used to promote film wise condensation
Pick out the correct statement?
A Hot worked materials are subjected to annealing to remove internal stresses
B Annealing of steel hardens it slightly
C Normalising of a material induces stresses
D Tempering of a material improves ductility & toughness but reduces hardness & brittleness
Correct Answer: Tempering of a material improves ductility & toughness but reduces hardness & brittleness
Pick out the wrong statement ?
A Seam welding, projection welding & spot welding are the classification of electrical resistance
B Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t =
C In spot welding, two pieces to be joined are overlapped and placed between two electrodes
D Mild steel sheet cannot be spot welded
Correct Answer: Mild steel sheet cannot be spot welded
Pick out the wrong statement ?
A Lead can creep under its own weight at room temperature
B The electrical conductivity of gold is considerably reduced by alloying additions due to the
C Recrystallisation temperature decreases with decrease in strain in a cold worked metal
D With increase in temperature, the electrical conductivity of intrinsic semi-conductor will
Correct Answer: Recrystallisation temperature decreases with decrease in strain in a cold worked metal
Pick out the wrong statement ?
A Both annealing and normalising release the internal stresses of the material besides improving
B Low carbon steel does not respond to the heat treatment for hardening of the material, hence it
C Induction hardening and flame hardening techniques are also used for surface hardening
D Martempering of a material is a hardening process
Correct Answer: Induction hardening and flame hardening techniques are also used for surface hardening
The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called__________________?
A Resilience
B Toughness
C Ductility
D Impact strength
Correct Answer: Resilience
More than 95% of _______________ is present in corundum ?
A SiO2
B Al2O3
C CaSiO2
D MgO
Correct Answer: Al2O3
L.D. (Linz-Donawitz) converter is used in the production of____________________?
A Copper
B Steel
C Zinc
D Aluminium
Correct Answer: Steel
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