Mechanical Operations

Specific surface area is the surface area of a unit _______________ of materials?

Byadmin February 18, 2019August 22, 2021

Specific surface area is the surface area of a unit _______________ of materials?

A. Weight
B. Volume
C. Either A. or B.
D. Neither A. nor B.

Mechanical Operations

A _______________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream?

A _______________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream?

A. Thickener
B. Classifier
C. Strainer
D. Clarifier

Read More A _______________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream?
Mechanical Operations

Which of the following is not used as a filter medium in case of corrosive liquids?

Which of the following is not used as a filter medium in case of corrosive liquids?

A. Nylon
B. Glass cloth
C. Metal cloth of monel or stainless steel
D. Cotton fabric

Read More Which of the following is not used as a filter medium in case of corrosive liquids?
Mechanical Operations

Shape factor for a cylinder whose length equals its diameter is_________________?

Shape factor for a cylinder whose length equals its diameter is_________________?

A. 1.5
B. 0.5
C. 1.0
D. 2.0

Read More Shape factor for a cylinder whose length equals its diameter is_________________?
Mechanical Operations

According to Taggart’s rule for selecting between a gyratory crusher and a jaw crusher; the later should be used, if the hourly tonnage to be crushed divided by the square of the gape expressed in cm is less than_______________?

According to Taggart’s rule for selecting between a gyratory crusher and a jaw crusher; the later should be used, if the hourly tonnage to be crushed divided by the square of the gape expressed in cm is less than_______________?

A. 0.00184
B. 0.0184
C. 0.184
D. 1.84

Read More According to Taggart’s rule for selecting between a gyratory crusher and a jaw crusher; the later should be used, if the hourly tonnage to be crushed divided by the square of the gape expressed in cm is less than_______________?
Mechanical Operations

Addition of filter aid to the slurry before filtration is done to _______________ of the cake?

Addition of filter aid to the slurry before filtration is done to _______________ of the cake?

A. Increase the porosity
B. Increase the compressibility co-efficient
C. Decrease the porosity
D. Decrease the compressibility co-efficient

Read More Addition of filter aid to the slurry before filtration is done to _______________ of the cake?
Mechanical Operations

The ratio of the area of openings in one screen (Taylor series) to that of the openings in the next smaller screen is_________________?

The ratio of the area of openings in one screen (Taylor series) to that of the openings in the next smaller screen is_________________?

A. 1.5
B. 1
C. √2
D. None of these

Read More The ratio of the area of openings in one screen (Taylor series) to that of the openings in the next smaller screen is_________________?

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