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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

Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________?
A 9.5 : 1
B 12.5 : 1
C 15.5 : 1
D 18.5 : 1
Correct Answer: 9.5 : 1
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?
A Cresylic acid
B Xanthaies
C Pine oil
D All A, B. & C.
Correct Answer: Xanthaies
While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterized by the ?
A Low impact strength
B High flexibility
C Better finish and surface appearance
D High plastic deformation
Correct Answer: Low impact strength
______________ the exhaust gas is an indication of the incomplete combustion of fuel?
A Low temperature of
B High temperature of
C High % of CO in
D High % of CO2 in
Correct Answer: High % of CO in
Which of the following terminology is used for the temperature at which new grains are formed in a metal ?
A Eutectic temperature
B Lower critical temperature
C Recrystallisation temperature
D Upper critical temperature
Correct Answer: Recrystallisation temperature
In ________________ process, there is an increase in entropy with no degradation of energy ?
A Isothermal expansion
B Isochoric heat addition
C Polytropic expansion
D Isobaric heat addition
Correct Answer: Isothermal expansion
Air-petrol ratio in an automotive petrol engine is around ________________?
A 14 : 1
B 22 : 1
C 25 : 1
D 4 : 1
Correct Answer: 14 : 1
____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ?
A Lancing
B Shot peening
C Slugging
D Spinning
Correct Answer: Shot peening
Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2) ?
A High speed steel
B Stainless steel
C Tungsten carbide
D Superalloys
Correct Answer: Tungsten carbide
Pick out the wrong conversion of absolute & kinematic viscosities ?
A 1 stoke = 1 cm2/sec
B 1 N.sec/m2 = 10 paise
C 1 stoke = 1 m2/sec
D 1 m2/sec = 104 stokes
Correct Answer: 1 stoke = 1 m2/sec
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