Question 1

Dry spots are formed during one of the following period?
A)Constant Rate period
B)First Falling period
C)Initial Adjustment period
D)Second falling period

Accepted Answer

B

Question 2

Eutectic Point is an important factor for one of the following drying processes?
A)Drum Drying
B)Fluidized Bed Drying
C)Tray drying
D)Freeze Drying

Accepted Answer

The eutectic point is crucial in freeze drying (lyophilization) because it represents the temperature at which the solid and liquid phases of a solution coexist at the lowest possible temperature. This is important for effectively sublimating the ice (transitioning directly from solid to gas) without melting it, which is a key process in freeze drying to preserve the structure and integrity of the material being dried.

Question 3

Filtration is a unit operation that is commonly used for collecting:
A)Filtrate
B)Particulate matter
C)Precipitate
D)Slurry

Accepted Answer

Filtration is a unit operation that is commonly used for collecting the filtrate, which is the liquid that passes through the filter.

Question 4

Who has proposed that the filtration process is similar to the streamline flow of a liquid under pressure through capillaries?
A)Carman
B)Darcy
C)Kozeny
D)Poiseuilli

Accepted Answer

Poiseuille proposed the concept that the filtration process is similar to the streamline flow of a liquid under pressure through capillaries, which is foundational to understanding fluid dynamics in narrow spaces.

Question 5

Which is the principle difference in the properties that influences centrifugation?
A)Densities
B)Interfacial Tensions
C)Particle size
D)Viscosities

Accepted Answer

Centrifugation primarily separates components based on differences in their densities.

Question 6

Centrifugal method is used for one of the following process:
A)Mixing
B)Purification
C)Separation
D)Sizing

Accepted Answer

The centrifugal method is primarily used for separation processes. It utilizes centrifugal force to separate substances of different densities or to remove moisture. For example, it's commonly used in laboratories for separating blood components and in industries for separating solid particles from liquids in suspensions.

Question 7

Water Attack test is performed on glass in order to find the limits of one of the following?
A)Acid liberated
B)Alkali liberated
C)Conductivity
D)Metal ions

Accepted Answer

The Water Attack test on glass is designed to determine the amount of alkali liberated from the glass surface when it comes into contact with water. This test is crucial for assessing the chemical durability of glass, especially for containers that will hold acidic or neutral aqueous solutions, to ensure that the glass does not significantly alter the solution's pH by releasing alkali.

Question 8

In Pharmaceutical packing, collapsible tubes made from lead are not used as such, for one of the following reason.
A)Costly metal
B)Difficulty in packing
C)Risk of Poisoning
D)Soft in strength

Accepted Answer

Lead can cause poisoning if it leaches into the products contained within the tubes, posing a significant health risk to consumers.

Question 9

One of the following glass containers is used for the storage of light sensitive pharmaceuticals.
A)Air-Tight
B)Amber Colored
C)Unit Dose
D)Well closed

Accepted Answer

Amber-colored glass containers are used for storing light-sensitive pharmaceuticals because the amber color can block or reduce the amount of light that reaches the product, thus protecting it from light-induced degradation.

Question 10

Containers meant for storage of injections (buffered & unbuffered aqueous solutions) are made from one of the following type of glasses.
A)Borosilicate
B)General Purpose
C)Lime soda
D)Neutral

Accepted Answer

Borosilicate glass is commonly used for storage of injections due to its high resistance to thermal shock and chemical durability, making it suitable for both buffered and unbuffered aqueous solutions.

Question 11

Hermetic sealed containers are also known as:
A)Air-Tight Containers
B)Multi-dose containers
C)Single-Dose containers
D)Well-closed containers

Accepted Answer

Hermetic sealed containers are designed to be completely air-tight, keeping their contents away from the external environment. This is why they are also known as Air-Tight Containers.

Question 12

Which metal makes steel corrosion resistant?
A)Copper and selenium
B)Tantalum and molybdenum
C)Chromium and Nickel
D)Titanium and Niobium

Accepted Answer

Chromium and Nickel are added to steel to make it corrosion resistant. Chromium, in particular, is crucial for forming a protective layer on the steel's surface, while nickel enhances the corrosion resistance in various environments.

Question 13

The ability of a metal surface to withstand repeated cycles of corrosion is known as:
A)Cavitation erosion
B)Corrosion fatigue
C)Erosion
D)Stress of corrosion cracking

Accepted Answer

Corrosion fatigue refers to the process where a metal surface can withstand repeated cycles of corrosion, typically under the influence of mechanical stress. This phenomenon combines the effects of cyclic stress and corrosion, leading to the initiation and propagation of cracks at a faster rate than would occur from either stress or corrosion alone.

Question 14

Corrosion of metals is fairly high in one of the following medium:
A)Acidic
B)Alkaline
C)Neutral
D)Non-Aqueous

Accepted Answer

Corrosion of metals is significantly higher in acidic mediums because acids readily participate in chemical reactions that lead to the deterioration or oxidation of metals. Acidic conditions accelerate the corrosion process by providing a conducive environment for the exchange of ions necessary for corrosion to occur.

Question 15

Galvanic Corrosion is observed, when external electric current in solution is passed between one of the following combinations:
A)Gold & Platinum
B)Iron & hydrogen
C)Iron & Iron
D)Zinc & Copper

Accepted Answer

Galvanic corrosion occurs when two different metals are in electrical contact in the presence of an electrolyte, such as water, creating a galvanic cell. Zinc and copper have significantly different standard electrode potentials, making them susceptible to galvanic corrosion when they are connected in a conductive solution.

Question 16

In Cyclone separator, the separation depends on:
A)Size & Shape
B)Shape and Surface area
C)Size & Density
D)Surface texture & Size

Accepted Answer

Cyclone separators rely on the centrifugal force to separate particles from the air or gas stream based on their size and density. The heavier and larger particles are forced to the outer edges and separated from the air flow.

Question 17

One of the theories is NOT applicable to distillation:
A)Graham's law of diffusion
B)Law of conservation of energy
C)Law of conservation of matter
D)Raoult's Law

Accepted Answer

Graham's law of diffusion primarily applies to the rate at which gases diffuse and is not directly applicable to the process of distillation, which involves the separation of mixtures based on differences in their volatilities in a boiling liquid mixture.

Question 18

Which product is NOT dried by spray dryer?
A)Serum
B)Fruit Juice
C)Lactose
D)Bacterial & viral cultures

Accepted Answer

Bacterial and viral cultures are typically not dried using spray dryers due to the high temperatures involved, which can denature or kill the microorganisms. Spray drying is more commonly used for products like serum, fruit juice, and lactose, where the high temperatures do not negatively affect the product's integrity.

Question 19

The correct definition of filtration is:
A)When solids are present in a very low concentration, i.e., not exceeding 1.0% w/v, the process of its separation from liquids
B)When solids are present in a very low concentration, i.e., not exceeding 5.0% w/v, the process of its separation from liquids
C)When solids are present in a very low concentration, i.e., not exceeding 2.0% w/v, the process of its separation from liquids
D)When solids are present in a very low concentration, i.e., not exceeding 7.0% w/v, the process of its separation from liquids

Accepted Answer

Filtration is typically defined as the process of separating solids from liquids when the solids are present in a low concentration, often not exceeding 1.0% w/v.

Quiz 5: Materials and Processes

Dry spots are formed during one of the following period?

Eutectic Point is an important factor for one of the following drying processes?

Filtration is a unit operation that is commonly used for collecting:

Who has proposed that the filtration process is similar to the streamline flow of a liquid under pressure through capillaries?

Which is the principle difference in the properties that influences centrifugation?

Centrifugal method is used for one of the following process:

Water Attack test is performed on glass in order to find the limits of one of the following?

In Pharmaceutical packing, collapsible tubes made from lead are not used as such, for one of the following reason.

One of the following glass containers is used for the storage of light sensitive pharmaceuticals.

Containers meant for storage of injections (buffered & unbuffered aqueous solutions) are made from one of the following type of glasses.

Hermetic sealed containers are also known as:

Which metal makes steel corrosion resistant?

The ability of a metal surface to withstand repeated cycles of corrosion is known as:

Corrosion of metals is fairly high in one of the following medium:

Galvanic Corrosion is observed, when external electric current in solution is passed between one of the following combinations:

In Cyclone separator, the separation depends on:

One of the theories is NOT applicable to distillation:

Which product is NOT dried by spray dryer?

The correct definition of filtration is: