Mechanical Operations

Size reduction does not occur due to compression in case of________________?

Byadmin February 18, 2019August 23, 2021

Size reduction does not occur due to compression in case of________________?

A. Rod mills
B. Gyratory crushers
C. Jaw crushers
D. Smooth roll crushers

Mechanical Operations

During the washing of cake_________________?

During the washing of cake_________________?

A. All the resistances are constant
B. Filter medium resistance increases
C. Filter medium resistance decreases
D. Cake resistance decreases

Read More During the washing of cake_________________?
Mechanical Operations

Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm) ?

Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm) ?

A. 0.01 L.S
B. 0.087 L.S
C. L.S
D. L.S/0.087

Read More Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm) ?
Mechanical Operations

Gravity settling process is not involved in the working of a________________?

Gravity settling process is not involved in the working of a________________?

A. Hydrocyclone
B. Classifier
C. Dorr-thickener
D. Sedimentation tank

Read More Gravity settling process is not involved in the working of a________________?
Mechanical Operations

Which of the following gives the crushing energy required to create new surface ?

Which of the following gives the crushing energy required to create new surface ?

A. Taggarts rule
B. Fick’s law
C. Rittinger’s Law
D. None of these

Read More Which of the following gives the crushing energy required to create new surface ?
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

At low Reynold’s number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5: Power number Re = ρ N D2/μ: Reynold’s number N is the impeller rotational speed, and D is the impeller diameter ?

At low Reynold’s number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5: Power number Re = ρ N D2/μ: Reynold’s number N is the impeller rotational speed, and D is the impeller diameter ?

A. Po ∝ Re-1.0
B. Po ∝ Re0.0
C. Po ∝ Re0.5
D. Po ∝ Re1.0

Read More At low Reynold’s number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5: Power number Re = ρ N D2/μ: Reynold’s number N is the impeller rotational speed, and D is the impeller diameter ?

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