DRYING
TOP 10 MCQ
1. In drying process, which of the following parameters is same as the adiabatic saturation temperature: [GPAT-2024]
(a) Absolute humidity
(b) Dew point
(c) Wet bulb temperature
(d) Relative humidity
2. The most efficient heat exchange between the particles and flowing air occurs in the [GPAT-2023 SHIFT-I]
(a) Tray dryer
(b) Vacuum dryer
(c) Fluidized bed dryer
(d) Rotary dryer
3. Which of the following DRYERS is a “static bed dryer” [GPAT-2022]
(a) Freeze dryer
(b) Fluid bed dryer
(c) Spray dryer
(d) Flash dryer
4. In which of the following techniques the sample is kept below triple point [GPAT-2016]
(a) Lyophilization
(b) Spray drying
(c) Spray congealing
(d) Centrifugation
5. Read the following statements about lyophilization [GPAT-2012]
[P] Lyophilization cannot be done in final containers like multiple dose containers
[Q] Lyophilized product needs special methods for reconstitution
[R] Lyophilization causes protein denaturation in tissues
[S] Lyophilization is suitable for drying the thermolabile products
Choose the correct combination of statements:
(a) P is true and Q, R & S are false
(b) Q is true and P, R & S are false
(c) R is true and P, Q & S are false
(d) S is true and P, Q & R are false
6. Which one of the following drying methods is commonly used in Pharma industry for drying of soft shell capsules [GPAT-2011]
(a) Truck drying
(b) Fluid bed drying
(c) Vacuum drying
(d) Microwave drying
7. Which one of the following is the commonly used bulking agent in the formulation of freeze-dried low-dose drug products [GPAT-2010]
(a) Sodium chloride
(b) Mannitol
(c) Starch
(d) HPMC
8. Match the following Industrial dryers with Pharmaceutical material dried [GATE-2008]
Group I – Industrial dryers
1. Drum dryer
2. Fluidized bed dryer
3. Spray dryer
4. Freeze dryer
Group II – Pharmaceutical material dried
[P] Antibiotic solution
[Q] Tablet granules
[R] Gelatin
[S] Suspension of kaolin
Options:
(a) 1-[P], 2-[R], 3-[S], 4-[Q]
(b) 1-[S], 2-[Q], 3-[R], 4-[P]
(c) 1-[S], 2-[Q], 3-[P], 4-[R]
(d) 1-[R], 2-[Q], 3-[P], 4-[S]
9. In the preparation of smallpox vaccine, the drying process used is [GATE-2005]
(a) Spray drying
(b) Vacuum drying
(c) Drum drying
(d) Freeze drying
10. For drying blood plasma the following technique is used [GATE-1989]
(a) Spray drying
(b) Freeze drying
(c) Vacuum drying
(d) Fluid bed drying
ANSWER KEY
| 1-c | 2-c | 3-a | 4-a | 5-d | 6-c | 7-b | 8-b | 9-d | 10-b |
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