Mechanical Operations Questions and Answers – Compressible Filter Cakes

This set of Mechanical Operations Multiple Choice Questions & Answers (MCQs) focuses on “Compressible Filter Cakes”.

1. When four vertical strips are attached, then tank is said to be ________
a) Baffled
b) Circulated
c) Maintained
d) Charged
View Answer

Answer: a
Explanation: Mixing vessel is said to be baffled when four vertical strips, each having a width of 1/10 to 1/12 of the tank diameter, are attached to the internal surface of the cylinder.

2. Inclined off-center installation of a propeller reduces the ___________
a) Vortex
b) Eddy
c) Baffle
d) Turbulence
View Answer

Answer: a
Explanation: Vertical or inclined off-center installation of a propeller reduces the vortex to a considerable extent provided the angle between the vertical and the center are properly adjusted.

3. While a propeller gives an axial liquid circulation pattern, a turbine gives __________
a) Lateral
b) Parallel
c) Axial
d) Radial
View Answer

Answer: d
Explanation: A propeller gives an axial liquid circulation pattern, a turbine gives a radial circulation pattern as they are two different types of impellors.
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4. Propellers can be used for ___________
a) Blending
b) Shearing
c) Tearing
d) Peering
View Answer

Answer: a
Explanation: Propellers are used for blending water-thin materials even in large tanks and can handle liquids having a maximum viscosity of about 2,000 centipoise.

5. The turbo disperser is type of _________
a) Continuous mixer
b) Batch mixer
c) Semi-continuous mixer
d) Tray mixer
View Answer

Answer: b
Explanation: The disperser liquid type of batch mixer uses intense dispersion mixer blades that are lowered into the liquid and then energized for mixing.
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6. Liquid disperser vertical mixers can approach near ____________
a) Saturation
b) Super saturation
c) Emulsification
d) Equilibrium
View Answer

Answer: c
Explanation: Liquid disperser vertical mixers can approach near emulsification and can handle very thick materials upon completion of the mixing.

7. Sonic and ultrasonic devices work at a frequency of ___________
a) 50 to 855 c/s
b) 1 to 1000 c/s
c) 15 to 20,000 c/s
d) 1000 to 5000 c/s
View Answer

Answer: d
Explanation: Sonic frequencies are from 15 to 20,000 c/s, ultrasonic frequencies are above 20,000 c/s., while ultrasonic frequencies are used in cavitation method.
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8. Powder mixing is a __________
a) Negative mixing
b) Positive mixing
c) Neutral mixing
d) Solid mixing
View Answer

Answer: c
Explanation: The components of such products do not have any tendency to mix spontaneously but once mixed, these are same with powder mixing.

9. ________ becomes necessary to effectively distribute materials.
a) Negative mixing
b) Positive mixing
c) Neutral mixing
d) Prolonged mixing
View Answer

Answer: d
Explanation: Prolonged mixing becomes necessary to effectively distribute materials like lubricants and wetting agents into tablet granules.
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10. If the denser component is above, the degree of mixing increases to ___________
a) Maximum
b) Minimum
c) Constant
d) Equilibrium
View Answer

Answer: a
Explanation: If the denser component is above, the degree of mixing increases to a maximum, then dropping to equilibrium as the denser component falls through the lighter one.

Sanfoundry Global Education & Learning Series – Mechanical Operations.

To practice all areas of Mechanical Operations, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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