Engineering Questions with Answers - Multiple Choice Questions

# Mechanical Operations MCQ’s – Electrostatic Separator

1 - Question

As the pressure increases, rate of flow is ______
a) Maximum
b) Minimum
c) Constant
d) Same

Explanation: As the pressure increases, however these two factors tend to become equal and at a certain optimum pressure rate of flow is maximum.

2 - Question

Filter operation should be maintained at a pressure _____ the optimum.
a) Maximum
b) Minimum
c) Optimum
d) Constant

Explanation: Obviously, filter operation should be maintained at a pressure below the optimum, this phenomenon is absent when filtering incompressible sledges

3 - Question

What does the following equation represent?

a) Change in volume
b) Change in area
c) Change in pressure

Explanation: The above equation gives the change in pressure, there is a linear relation between V2 and t or between t/V and V.

4 - Question

The flow rate of liquid is directly proportional to _____
a) Resistance
b) Peer bar
c) Pressure difference
d) Volume

Explanation: It is seen that the flow rate of liquid is directly proportional to the pressure difference, it is resistance cloth plus the initial layers.

5 - Question

Most filter cakes are ______
a) Inelastic
b) Elastic
c) Denser
d) Steeper

Explanation: Most of the cakes are inelastic and the greater resistance offered to flow at a high pressure differences is caused by compact packing.

6 - Question

The actual compressive pressure depends on _______
a) Structure of cake
b) Path of flow
c) Length of bed
d) Depth of bed

Explanation: The actual compressive pressure will depend upon the structure of cake and nature of the contact between the particles.

7 - Question

As the void age decreases, resistance shows a ______
a) Constant Nature
b) Decrease
c) Increase
d) No change

Explanation: The void age thus decrease from the free surface to the filter medium and the resistance shows a corresponding increase.

8 - Question

The following equation represents the ______

a) Specific ramp
c) Specific resistance
d) Specific volume

Explanation: The specific resistance term r ̅ is based on the flow of filtrate through unit mass of cake deposited on unit area.

9 - Question

______ is a solid material, finely divided but consisting of hard, strong particles.
a) Filter media
b) Filter aid
c) Filter space
d) Dung

Explanation: Filter aid are used for sludge’s that are difficult to filter, it is a solid material but consists of hard and strong particles.

10 - Question

The pressure of filter aid increases the _____
a) Porosity
b) Density
c) Velocity
d) Stativity