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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

In the laminar boundary layer flow over a flat plate, the ratio (δ/x) varies as: (where, ‘δ’ is the boundary layer thickness and ‘x’ is the distance from the leading edge in the direction of flow)?
A Re
B √Re
C 1/Re
D Re-1/2
Correct Answer: Re
An ideal nozzle design aims at________________?
A Minimising wall friction
B Suppressing boundary layer separation
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
One horsepower is equal to________________?
A 550 lbf.ft/second
B 550 kgf.m/second
C Both A. and B.
D 550 lbf.ft./hr
Correct Answer: 550 lbf.ft/second
In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature) ?
A 1/√T
B 1/T
C √T
D T
Correct Answer: √T
With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost________________?
A Increases
B Decreases
C Remains unchanged
D Increases exponentially
Correct Answer: Decreases
Acceleration head in a reciprocating pump_______________________?
A Increases the work done during delivery stroke
B Decreases the work done during suction stroke
C Does not change the work requirement of the pump
D Increases the work done during suction stroke
Correct Answer: Does not change the work requirement of the pump
In case of a ____________ the energy of flow is considerably decreased downstream of the machine?
A Blower
B Turbine
C Centrifugal pump
D Centrifugal fan
Correct Answer: Turbine
The normal stress is the same in all directions at a point in a fluid, when the fluid is__________________?
A Non-viscous
B Incompressible
C Both A. and B.
D Having no motion of one fluid layer relative to the other
Correct Answer: Having no motion of one fluid layer relative to the other
A pipe is defined as ‘hydraulically smooth’, if the friction factor_________________?
A Is not a function of Reynolds number
B For a given Reynolds number remains constant even on further smoothening of the pipe
C Is zero irrespective of the Reynolds number
D None of these
Correct Answer: For a given Reynolds number remains constant even on further smoothening of the pipe
Dean number is concerned with the____________________?
A Fluid-particle interaction
B Fluid flow through helical pipes
C Power consumption in agitated vessels
D Psychrometry
Correct Answer: Fluid flow through helical pipes
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