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Mechanical Operations

Mechanical Operations
Moore filter is a __________ filter.

Rotary
Leaf
Press
Sand

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Mechanical Operations
Dust collection efficiency of electrostatic precipitator can be as high as 99.9%. Maximum temperature and pressure of dust laden gas that can be cleaned in an electrostatic precipitator is respectively.

500°C and 50 atm
200°C and 5 atm
1000°C and 500 atm
1000°C and 10 atm

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Mechanical Operations
Sedimentation on commercial scale occurs in

Cyclones
Thickeners
Rotary drum filters
Classifiers

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Mechanical Operations
The ratio of the actual mesh dimension of Taylor series to that of the next smaller screen is

2
√3
1.5
√2

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Mechanical Operations
Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines?

Tube mill
Compartment mill
Pebble mill
Rod mill

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Mechanical Operations
Limestone is normally crushed in a

Tube mill
Hammer crusher
Ball mill
Roll crusher

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