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
View Answer
Answer: a
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
View Answer
Answer: c
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
d) Change of radius
View Answer
Answer: a
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
View Answer
Answer: c
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
View Answer
Answer: a
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
View Answer
Answer: a
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
View Answer
Answer: b
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
b) Specific radius
c) Specific resistance
d) Specific volume
View Answer
Answer: c
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
View Answer
Answer: b
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
View Answer
Answer: a
Explanation: The pressure of filter aid increases the porosity of the sludge, decreases its compressibility and reduces the resistance of the cake during filtration.