Chemical Engineering Mcqs

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

Answer

Submitted By :Ali Uppal

Carbon black is pulverised in a_______________?

• (A)  Hammer crusher
• (B)  Ball mill
• (C)  Roll crusher
• (D)  Gyratory crusher

Answer

Submitted By :Ali Uppal

Which of the following is a vacuum filter ?

• (A)  Filter press
• (B)  Rotary disc filter
• (C)  Batch basket centrifuge
• (D)  Tank filter (Nutsche filter)

Answer

Submitted By :Ali Uppal

A fluid energy mill is used for_________________?

• (A)  Cutting
• (B)  Grinding
• (C)  Ultra grinding
• (D)  Crushing

Answer

Submitted By :Ali Uppal

Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?

• (A)  Sand bed filter
• (B)  Plate and frame filter press
• (C)  Vacuum filter
• (D)  Batch basket centrifuge

Answer

Submitted By :Ali Uppal

The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)__________________?

• (A)  ∝ ΔP
• (B)  ∝ 1/ ΔP
• (C)  ∝ √ΔP
• (D)  Independent of ΔP

Answer

Submitted By :Ali Uppal

As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?

• (A)  LS
• (B)  93 LS
• (C)  250 LS
• (D)  √(LS)

Answer

Submitted By :Ali Uppal

With increase in the capacity of screens, the screen effectiveness__________________?

• (A)  Remains unchanged
• (B)  Increases
• (C)  Decreases
• (D)  Decreases exponentially

Answer

Submitted By :Ali Uppal

Filtration of water in a paper mill is done by a/an _______________ filter?

• (A)  Open sand
• (B)  Plate and frame
• (C)  Vacuum leaf
• (D)  Sparkler

Answer

Submitted By :Ali Uppal

Reciprocal of sphericity is termed as the________________?

• (A)  Specific surface ratio
• (B)  Shape factor
• (C)  Sauter diameter
• (D)  Surface area per unit mass

Answer

Submitted By :Ali Uppal