Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with __________ to get the same for dry grinding.

Mechanical Operations
Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with __________ to get the same for dry grinding.

1.34

0.5

1

4.34

1.34

0.5

1

4.34

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations
Tabular bowl centrifuges as compared to disk bowl centrifuges

Can't be used for separation of fine suspended solids from a liquid

Can not be operated under pressure/vacuum

Employ bowl of larger diameter

Operate at higher speed

Can't be used for separation of fine suspended solids from a liquid

Can not be operated under pressure/vacuum

Employ bowl of larger diameter

Operate at higher speed

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations
Size measurement of ultrafine particles can be best expressed in terms of

Surface area per unit mass

Micron

Centimetre

Screen size

Surface area per unit mass

Micron

Centimetre

Screen size

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations
Shell and leaf filter as compared to plate and frame filter

Entails less labor cost

All of these

Provides more effective washing

Facilitates filtration under higher pressure

Entails less labor cost

All of these

Provides more effective washing

Facilitates filtration under higher pressure

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations
Use of 'grinding aids' is done in __________ grinding.

Intermediate

Dry

Wet

Ultrafine

Intermediate

Dry

Wet

Ultrafine

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations
Rod mills employed for grinding

All of these

Is useful for handling sticky materials

Employ a steel shell having L/D ratio of 1.5 to 3.0

Employ steel rods of 2-12 cms diameter extending over full length of the mill

All of these

Is useful for handling sticky materials

Employ a steel shell having L/D ratio of 1.5 to 3.0

Employ steel rods of 2-12 cms diameter extending over full length of the mill

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations

Mechanical Operations Tabular bowl centrifuges as compared to disk bowl centrifuges

Mechanical Operations Size measurement of ultrafine particles can be best expressed in terms of

Mechanical Operations Shell and leaf filter as compared to plate and frame filter

Mechanical Operations Use of 'grinding aids' is done in __________ grinding.

Mechanical Operations Rod mills employed for grinding

Mechanical Operations
Tabular bowl centrifuges as compared to disk bowl centrifuges

Mechanical Operations
Size measurement of ultrafine particles can be best expressed in terms of

Mechanical Operations
Shell and leaf filter as compared to plate and frame filter

Mechanical Operations
Use of 'grinding aids' is done in __________ grinding.

Mechanical Operations
Rod mills employed for grinding