Importance of Electrostatic Precipitator

Q. Read the following statements (A - C) related to electrostatic precipitators and select the correct option stating true (T) or false (F).

A. It is one of the most widely used devices to remove particulate matter.
B. It can remove over 99 % of the particulate matter from the exhaust of a thermal power plant.
C. The velocity of air between the collecting plates in this device must be very high.

1. A - T, B - F, C - T
2. A - F, B - T, C - F
3. A - T, B - T, C - F
4. A - F, B - F, C - T

Q. In a coal fired power plant, electrostatic precipitators are installed to control emission of

1. SO₂
2. NO_x
3. SPM
4. CO

Q. The given diagram represents Miller’s experiment. Identify the labellings A, B, C, D and choose the correct option.

1. A - Electrodes, B - $N{H}_3+H_2+H_{2}O+C{H}_4$, C - Liquid water in trap, D - Vacuum pump
2. A - Electrodes, B - $N{H}_4+H_2+C{O}_2+C{H}_3$, C - Liquid water in trap, D - Vacuum pump
3. A - Electrodes, B - $N{H}_3+H_{2}O$, C - Liquid water in trap, D - Tap
4. A - Electrodes, B - $N{H}_3+C{O}_2+H_{2}O+C{H}_4$, C - Liquid water in trap, D - Vacuum pump

Q. Study the image given below, identify A, B, C and D and select the correct option.

1. A – Negatively charged wire, B – Negatively charged dust particles, C – Discharge corona, D – Collection plate
2. A – Negatively charged wire, B – Discharge corona, C – Collection plate, D – Negatively charged dust particles
3. A – Positively charged wire, B – Positively charged dust particles, C – Discharge corona, D – Collection plate
4. A – Positively charged wire, B – Discharge corona, C – Collection plate, D – Positively charged dust particles

Q. Which of the following is not related with electrostatic preciptator and scrubber

1. 99% particulate matter is removed by it
2. ${\mathrm{SO}}_2$
3. Vapours containing mercury
4. Oxides of nitrogen

Q.

In a coal-fired power plant, electrostatic precipitators are installed to control the emission of

1. SO₂

2. SPM

3. CO

4. NO_x

Q. In a coal fired power plant, electrostatic precipitators are installed to control emission of

1. SO₂
2. NO_x
3. SPM
4. CO

Q.

A pollutant causing a burning sensation in the throat and eyes, along with feeling of vomiting is

1. Hydrogen sulphide

2. Arsenic.

3. Hydrogen cyanide

4. Sulphur dioxide

Q. The diagram below shows electrostatic precipitators. Identify 1, 2 and 3.

1. 1 - Discharge corona, 2 - Negatively charged wire, 3 - Collection plate burnt
2. 1 - Discharge corona, 2 - Positively charged wire, 3 - Collection plate grounded
3. 1 - Uncharge corona, 2 - Positively charged wire, 3 - Collection plate never grounded
4. 1 - Discharge corona, 2 - Negatively charged wire, 3 - Collection plate grounded

Q. In a coal-fired power plant electrostatic precipitators are installed to control emission of:

1. $S{O}_2$
2. NO2
3. SPM
4. CO

Q.

A pollutant causing a burning sensation in the throat and eyes, along with feeling of vomiting is

1. Hydrogen sulphide

2. Sulphur dioxide

3. Hydrogen cyanide

4. Arsenic

Q. The given diagram represents Miller’s experiment. Identify the labellings A, B, C, D and choose the correct option.

1. A - Electrodes, B - $N{H}_3+H_2+H_{2}O+C{H}_4$, C - Liquid water in trap, D - Vacuum pump
2. A - Electrodes, B - $N{H}_4+H_2+C{O}_2+C{H}_3$, C - Liquid water in trap, D - Vacuum pump
3. A - Electrodes, B - $N{H}_3+H_{2}O$, C - Liquid water in trap, D - Tap
4. A - Electrodes, B - $N{H}_3+C{O}_2+H_{2}O+C{H}_4$, C - Liquid water in trap, D - Vacuum pump

Q. Particulate and gaseous pollutants along with harmless gases are released from the thermal power plants. Name the most widely used device of removing particulate pollutants from the air.

1. Electrostatic precipitator
2. Fabric filters
3. Cyclone separators
4. None of the above

Q. With regard to the assertion and reason, choose the correct option:
Assertion [A]: Suspended particulate matter (SPM) is a major pollutant released by diesel vehicles.
Reason [R]: Catalytic converters greatly reduce pollution caused by automobiles.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. Both A and R are false

Q.

Ascrubber in exhaust of a chemical industrial plant removes :

1) gases like ozone and methane

2) particulate matter of the size 2.5 micrometer or less

3) gases like sulphur dioxide

4) particulate matter of the size 5 micrometer or above

Q. With regard to the assertion and reason, choose the correct option:
Assertion [A]: Suspended particulate matter (SPM) is a major pollutant released by diesel vehicles.
Reason [R]: Catalytic converters greatly reduce pollution caused by automobiles.

1. Assertion is true but reason is false
2. Both assertion and reason are true but the reason is not the correct explanation for the assertion
3. Both assertion and reason are true and the reason is the correct explanation for assertion
4. Both assertion and reason are false

Q. In a coal power plant, electrostatic precipitators are installed to control emission of

1. $S{O}_2$
2. SPM
3. $N{O}_2$
4. CO

Q. In a coal fired power plant, electrostatic precipitations are installed to control emission of

1. $S{O}_2$
2. $N{O}_x$
3. SPM
4. CO

Q. Multiple Choice Questions
In coal fired power plant, electrostatic precifications are used to control emission of

1. $S{O}_2$
2. $SPM$
3. $CO$
4. $N{O}_X$

Q. In a coal-fired power plant electrostatic precipitators are installed to control emission of:

1. CO
2. $S{O}_2$
3. NO2
4. SPM

Q. In a coal fired power plant electrostatic precipitators metabolites are installed to control emission of

1. CO
2. $S{O}_2$
3. $N{O}_x$
4. SPM

Q. What is electrostatic precipitation?

Q. C.O.D. stands for

1. Control of diesel
2. Chemical oxygen demand
3. Cemistry of depositions
4. Csiumoxide deposition

Q.

Q no6 The percentage compostion by weight of a sample of coal was found to be follows

C=24% O2=8% H2=5% Ash=63%

And it was observred that he dry flue gas has the following compostion by volume

CO2=10% CO=2% O2=13% N2=75%

Determine

(a)(A)The minimum amount of air required for complete combustion of 1 kg of coal.

(B)The weight of excess air reqired per kg of coal