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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 equivalent diameter for pressure drop calculation for a duct of square cross-section is given by (where, x = each side of the square duct) ?
A x
B √(πx)
C √(2x)
D √(x/2)
Correct Answer: x
Hydraulic intensifier is used for increasing the ___________________?
A Rate of velocity of liquid supply
B Rate of flow through delivery pipeline of a pump
C Intensity of pressure of the liquid
D Momentum rate through delivery pipe
Correct Answer: Intensity of pressure of the liquid
Net positive suction head (NPSH) of a centrifugal pump must be____________________?
A Greater than the vapour pressure of the liquid
B Less than the vapour pressure of the liquid
C Equal to the vapour pressure of the liquid
D Less than barometric pressure
Correct Answer: Greater than the vapour pressure of the liquid
The ratio of the hydraulic radius to the diameter of the channel, for maximum mean velocity of flow in a circular channel, in open channel flow is_________________?
A 0.3
B 0.9
C 0.03
D 0.66
Correct Answer: 0.3
Which is not a variable head meter _________________?
A Venturimeter
B Pitot tube
C Rotameter
D None of these
Correct Answer: Rotameter
Power requirement of fans having constant wheel diameter varies _____________ fan speed?
A As square of
B Directly as
C As cube of
D None of these
Correct Answer: As cube of
For a reciprocating pump, the indicator diagram is the graph between the________________?
A Discharge and overall efficiency
B Volume swept by piston for one complete revolution and the pressure in the cylinder
C Angle swept by the crank pin at any instant and the discharge
D None of these
Correct Answer: Volume swept by piston for one complete revolution and the pressure in the cylinder
Efficiency of power transmission (ε) through a circular pipe is given by (ht – hf)/ht, which has a maximum value of _____________ percent?
A 33:3
B 50
C 66.6
D 88.8
Correct Answer: 66.6
A bed consists of particles of density 2000 kg/m3. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is_________________?
A 25.61 kPa
B 11.77 kPa
C 14.86 kPa
D 21.13 kPa
Correct Answer: 11.77 kPa
The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is_________________?
A Q∝N : H∝N2 : P∝N3
B Q∝N2 : H∝N3 : P∝N
C Q∝N : H∝N3 : P∝N2
D Q∝N3 : H∝N : P∝N2
Correct Answer: Q∝N : H∝N2 : P∝N3
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