Engineering Questions with Answers - Multiple Choice Questions
Mechanical Operations MCQ’s – Compressible Filter Cakes
1 - Question
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 - Question
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 - Question
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.
Explanation: A propeller gives an axial liquid circulation pattern, a turbine gives a radial circulation pattern as they are two different types of impellors.
4 - Question
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 - Question
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.
6 - Question
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 - Question
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.
8 - Question
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 - Question
________ 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.
10 - Question
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.