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Code: R7411005

IV B. Tech I Semester (R07) Regular & Supplementary Examinations, November/December 2011 POWER PLANT INSTRUMENTATION

(Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80

Answer any FIVE questions All questions carry equal marks

*****

1 Describe a nuclear power generation with the help of a block diagram. 2 What is a current transformer? Explain how C.T can be used to extend the range of a

wattmeter. 3 Explain in brief the pollution monitoring instruments used in power plants. 4 Write short notes on the following:

(a) Super heater. (b) Reheat steam temperature control. (c) Bypass damper.

5 Explain the role of computers in detail. 6 Write a short account of the measuring devices used for turbine supervisor control and

explain how the turbine is protected against shell temperature. 7 What is basic principle of working of paramagnetic oxygen Analyser? Explain the same with

necessary diagrams. 8 Describe the principle of liquid chromatography. Explain with schematic diagram.

*****

1

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JNTUWORLD

Code: R7411005

IV B. Tech I Semester (R07) Regular & Supplementary Examinations, November/December 2011 POWER PLANT INSTRUMENTATION

(Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80

Answer any FIVE questions All questions carry equal marks

*****

1 Briefly explain how power is generated in a solar power plant by different method. 2 Write short notes on the following:

(a) Two wattmeter method of measuring three phase power. (b) Sources of error in electro dynamometer wattmeter.

3 Explain the importance of instrumentation in thermal power plants. 4 (a) Draw & explain the HP/LP heater level control scheme in detail. (b) Draw & explain feed tank level control in detail. 5 Describe with a neat sketch, the principle and constructional details of B.F.P recirculation

control. 6 Explain about gland steam exhaust pressure control. 7 What is the basic principle of working trim analyzer? Explain the same with neat sketch. 8 Explain about fuel analyzer in detail.

*****

2

www.jntuworld.com

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JNTUWORLD

Code: R7411005

IV B. Tech I Semester (R07) Regular & Supplementary Examinations, November/December 2011 POWER PLANT INSTRUMENTATION

(Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80

Answer any FIVE questions All questions carry equal marks

*****

1 Explain with necessary diagrams the control of different important parameters in a boiler process.

2 Explain briefly:

(a) Principle of operation of electrical resonance type frequency meter. (b) Wein bridge circuit for the measurement of frequency.

3 Explain the role of level radiation detectors in power plants. 4 Explain the terms:

(a) Hurner tilting up. (b) Excessive air-control.

5 Explain in detail about pulverizer control in power plants. 6 Write a short note on the following:

(a) Generator cooling system. (b) Condenser vacuum control.

7 Explain the constructional details, principle & working of a thermal conductivity analyzer used

in power plants. 8 Explain in detail about meter with neat sketch.

*****

3

www.jntuworld.com

www.jntuworld.com

JNTUWORLD

Code: R7411005

IV B. Tech I Semester (R07) Regular & Supplementary Examinations, November/December 2011 POWER PLANT INSTRUMENTATION

(Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80

Answer any FIVE questions All questions carry equal marks

*****

1 Explain how power is generated in a hydro electric power plant in detail with neat sketch.

2 Explain how the air flow rate is measured in a power plant with a relevant diagram.

3 Discuss in detail the methods of damping employed in electro mechanical indicating instruments.

4 Explain how steam temperature and feed water temperature measurements are performed.

What are the sources of error in measurement?

5 Explain in detail about hot well and deaerator level control with neat sketches.

6 Explain the shell temperature monitor in lubricating oil temperature control with respect to generator cooling system.

7 Write short notes:

(a) Spectrum analyzer. (b) Hydrogen purity meter.

8 Write short notes on conductivity shell and fuel analyzer.

*****

4

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