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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

The unit of velocity head is_________________?
A ft-lb/sec
B ft-lb/ft3
C ft-lbf/lb
D ft-lbf/sec
Correct Answer: ft-lbf/lb
The capacity of a centrifugal pump Can be increased by increasing the_________________?
A Impeller diameter or speed
B Number of pumps and joining them in series
C Number of pumps and joining them in parallel
D All A., B. and C.
Correct Answer: All A., B. and C.
Curve III in the bellow diagram represents a/an________________?
A Dilatent fluid
B Pseudo plastic fluid
C Ideal plastic
D None of these
Correct Answer: Pseudo plastic fluid
The main factor on which the behaviour of a mass of fluidised solid depends mainly is the___________________?
A Fluid characteristics
B Particle size
C Both A. and B.
D Neither A. nor B.
Correct Answer: Both A. and B.
Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the_______________?
A Drag on particles
B Drag on column walls
C Bed height
D Bed voidage
Correct Answer: Bed height
What is the unit of kinematic viscosity in SI unit ?
A M2/sec
B N/m2. sec
C Kg. sec/m
D None of these
Correct Answer: M2/sec
A rectangular surface 3′ × 4′, has the lower 3 edge horizontal and 6′ below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water) ?
A 39.6y
B 48y
C 49.2y
D 58y
Correct Answer: 48y
A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed ?
A 0.2
B 0.5
C 0.7
D 0.8
Correct Answer: 0.7
In power law, δ = [A (du/dy)2 + B] then the fluid is__________________?
A Newtonian
B Dilatant
C Thixotropic
D Rheopectic
Correct Answer: Newtonian
Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke’s law range is_________________?
A 24/NRe,P
B 16/NRe,P
C 64/NRe,P
D 48/NRe,P
Correct Answer: 24/NRe,P
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