MIXING
TOP 10 MCQ
1. Which among the following is an example of high shear mixer [GPAT-2024]
(a) Sigma blade mixer
(b) Turbine mixer
(c) Jet mixer
(d) Nauta mixer
2. Match List I with List II
List I (Equipment)
1. Low shear mixer
2. Rotary tablet machine
3. Capsule filling machine
4. Compaction mill
List II (Model/Trade Name/Type)
[P] Manesty Drycota
[Q] Chilsonator (Fitzpatrick)
[R] Slated Double Cone Mixer
[S] Prosolv (JRS Pharma)
[T] PCF 1200 Model (Pharma Land)
Choose the correct answer from options below [GPAT-2021]
(a) 1-[P], 2-[Q], 3-[R], 4-[S]
(b) 1-[Q], 2-[R], 3-[P], 4-[S]
(c) 1-[R], 2-[P], 3-[S], 4-[Q]
(d) 1-[P], 2-[Q], 3-[S], 4-[R]
3. The dispersion of coarse material by shearing in a narrow gap between a static cone and rapidly rotating cone is caused by [GPAT-2020]
(a) Colloid mill
(b) Electrical dispersion
(c) Peptization
(d) Ultrasonic irradiation
4. In solid-solid mixing, large scale continuous type of mixer is [GPAT-2020]
(a) Sigma blender
(b) Ribbon blender
(c) Zigzag blender
(d) Twin shell blender
5. In Direct-Contact or Jet condensers, barometric leg serves one of the following functions [GPAT-2019]
(a) To remove the condensate/cooling water mixture
(b) To measure the pressure difference across the tube
(c) To heat the liquid feed to its boiling point
(d) To transfer the feed in the evaporating chamber
6. Statement 1: Vortex formation can be minimized by push-pull mechanism
Statement 2: Vortex formation reduces the mixing intensity by increasing the velocity of impeller [GPAT-2018]
(a) True, False
(b) True, True
(c) False, False
(d) False, True
7. Mixing of semisolids is carried out using [GATE-2005]
(a) Double cone mixer
(b) Rotating cube mixer
(c) Planetary mixer
(d) Fluidized bed mixer
8. Thermolabile immiscible liquid can be separated by [GATE-1990]
(a) Decantation
(b) Dilution
(c) Capacity centrifugation
(d) Counter current distribution
9. Which mixing equipment produce tumbling as a mechanism in solid-solid mixing
(a) Fluidized mixer
(b) Ribbon blender
(c) Sigma blender
(d) V-Cone blender
10. What is the shape of mixing element present in Zig-zag mixer
(a) Cube shape
(b) Double cone shape
(c) Sigma shape
(d) V-shape
ANSWER KEY
| 1-a | 2-c | 3-a | 4-c | 5-a | 6-a | 7-c | 8-a | 9-d | 10-b |
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