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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 process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s-1. A 1 – 1 shell and tube heat exchanger is available. The best arrangement is_______________?
A Counter flow with process stream on shell side
B Counter flow with process stream on tube side
C Parallel flow with process stream on shell side
D Parallel flow with process stream on tube side
Correct Answer: Counter flow with process stream on shell side
Natural convection is characterised by__________________?
A Grashoff number
B Peclet number
C Reynolds number
D Prandtl number
Correct Answer: Grashoff number
The unit of heat transfer co-efficient is_________________?
A BTU/hr. ft2°F
B BTU/hr. °F. ft
C BTU/hr. °F
D BTU/hr. ft
Correct Answer: BTU/hr. ft2°F
In Joule’s experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms-2. Neglecting the heat capacity of agitator, the temperature of water (in °C) is________________?
A 40.5
B 34.4
C 26.8
D 25
Correct Answer: 34.4
Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats ?
A P and Q
B P and R
C P and S
D R and S
Correct Answer: P and S
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is________________?
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
Correct Answer: Finned tube heat exchanger with air outside and steam inside
Heat exchanger tubes are never made of_________________?
A Plain carbon steel
B Stainless steel
C Lead
D Copper
Correct Answer: Lead
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of ‘a’ in SI system will be________________?
A W/m.k
B W/m
C W/m.k2
D None, ‘a’ is just a number
Correct Answer: W/m.k
When vaporisation takes place directly at the heating surface, it is called________________?
A Film boiling
B Nucleate boiling
C Vapour binding
D None of these
Correct Answer: Nucleate boiling
Thermal conductivity of a conducting solid material depends upon its_______________?
A Temperature
B Porosity
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
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