Mechanical Operations

Moisture can be removed from lubricating oil using_________________?

Byadmin February 18, 2019August 22, 2021

Moisture can be removed from lubricating oil using_________________?

A. Tubular centrifuge
B. Clarifier
C. Sparkler filter
D. Vacuum leaf filter

Mechanical Operations

Trommels are revolving screens which normally operate in the range of _______________ rpm?

Trommels are revolving screens which normally operate in the range of _______________ rpm?

A. 1 – 2
B. 15 – 20
C. 40 – 50
D. 60 – 75

Read More Trommels are revolving screens which normally operate in the range of _______________ rpm?
Mechanical Operations

For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately _____________ microns?

For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately _____________ microns?

A. 5
B. 50
C. 500
D. 5000

Read More For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately _____________ microns?
Mechanical Operations

As the product becomes finer, the energy required for grinding___________________?

As the product becomes finer, the energy required for grinding___________________?

A. Decreases
B. Increases
C. Is same as for coarser grinding
D. Is 1.5 times that for coarser grinding

Read More As the product becomes finer, the energy required for grinding___________________?
Mechanical Operations

A fluid energy mill is used for __________________?

A fluid energy mill is used for __________________?

A. Cutting
B. Grinding
C. Ultra-grinding
D. Crushing

Read More A fluid energy mill is used for __________________?
Mechanical Operations

Which of the following is a continuous filter ?

Which of the following is a continuous filter ?

A. Plate and frame filter
B. Cartridge filter
C. Shell and leaf filter
D. None of these

Read More Which of the following is a continuous filter ?
Mechanical Operations

Which of the following relationships between co-efficient of friction (μ) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct ?

Which of the following relationships between co-efficient of friction (μ) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct ?

A. μ > tan α
B. μ ≥ tan α
C. μ > tan 2α
D. μ ≤ tan α

Read More Which of the following relationships between co-efficient of friction (μ) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct ?

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