Mechanical Operations Archives

Size measurement of ultrafine particles can be best expressed in terms of___________________?

Size measurement of ultrafine particles can be best expressed in terms of___________________?

A. Centimetre
B. Screen size
C. Micron
D. Surface area per unit mass

Size measurement of ultrafine particles can be best expressed in terms of___________________? Read More »

Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?

Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?

A. State or manner of application of the crushing force
B. Ultimate strength of the material
C. Elastic constant of the material
D. All A., B. and C.

Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________? Read More »

Mechanical Operations

During filtration operation, the filtrate encounters the resistance of the ___________________?

Mechanical Operations / admin

During filtration operation, the filtrate encounters the resistance of the ___________________?

A. Filter medium
B. Cake
C. Channel carrying the slurry to the upstream side of the cake and filtrate away from the filter
medium
D. All A., B. and C.

During filtration operation, the filtrate encounters the resistance of the ___________________? Read More »

Mechanical Operations

_____________ is the most suitable for compounding rubber and plastic solids ?

Mechanical Operations / admin

_____________ is the most suitable for compounding rubber and plastic solids ?

A. Banbury mixer
B. Pan mixer
C. Pug mill
D. Charge can mixer

_____________ is the most suitable for compounding rubber and plastic solids ? Read More »

Mechanical Operations

What is the reduction ratio in a fine crushing operation having following feed and product sizes ?

Mechanical Operations / admin

What is the reduction ratio in a fine crushing operation having following feed and product sizes ?

A. 0.5
B. 2
C. 5
D. 10

What is the reduction ratio in a fine crushing operation having following feed and product sizes ? Read More »

Mechanical Operations

For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________?

Mechanical Operations / admin

For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________?

A. d
B. √d
C. d2
D. 1/d

For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________? Read More »

Mechanical Operations

For efficient grinding, ball mills must be operated__________________?

Mechanical Operations / admin

For efficient grinding, ball mills must be operated__________________?

A. At a speed less than the critical speed
B. At a speed more than the critical speed
C. At a speed equal to the critical speed
D. With minimum possible small balls

For efficient grinding, ball mills must be operated__________________? Read More »

Mechanical Operations

Rittinger’s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger’s number of a material indicates its________________?

Mechanical Operations / admin

Rittinger’s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger’s number of a material indicates its________________?

A. Easier grindability
B. Poor grindability
C. High power consumption in grinding
D. None of these

Mechanical Operations