JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year ELECTRONIC MEASUREMENTS AND INSTRUMENTATION Previous Question Paper (November/December - 2018 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
Explain the concept of Gaussian Error in detail.
Answer
Gaussian error, also known as normal distribution error, refers to the statistical distribution of random errors in measurements. It assumes that small errors are more frequent than large ones, and that positive and negative errors of the same magnitude are equally likely, resulting in a bell-shaped curve centered around the true value.
List out the different types of Errors presented in measuring instruments.
Answer
Errors in measuring instruments are broadly classified into three types:
- Gross errors: Caused by human mistakes in reading, recording, or using instruments.
- Systematic errors: Consistent deviations due to instrumental defects, environmental factors, or observational habits.
- Random errors: Unpredictable variations resulting from unknown causes or small fluctuations in parameters.
What is Signal Generator?
Answer
Sign in to view the complete answer paper.
List out the few applications of AF oscillator.
Answer
Sign in to view the complete answer paper.
List out the different applications of CRO.
Answer
Sign in to view the complete answer paper.
Explain the procedure how to Measurement of Time period of any wave in CRO.
Answer
Sign in to view the complete answer paper.
What is Piezo electric effect?
Answer
Sign in to view the complete answer paper.
Explain the importance of Thermocouples with one example.
Answer
Sign in to view the complete answer paper.
List out the different Limitations of Wheatstone’s Bridge in detail.
Answer
Sign in to view the complete answer paper.
List out different flow measurement method.
Answer
Sign in to view the complete answer paper.
PART - B
Draw the Ramp type Digital voltmeter and explain its operation in detail.
Answer
Sign in to view the complete answer paper.
A Voltmeter having a sensitivity of 60kΩ/V reads 40V on a 100V scale, when connected across an unknown resistor. The current through the resistor is 4mA. Calculate the % of error due to loading effect.
Answer
Sign in to view the complete answer paper.
Draw the Sketch and explain the principle and operation of True RMS measuring Thermocouple type Voltmeter.
Answer
Sign in to view the complete answer paper.
Define Fidelity? Explain the importance of Fidelity in measuring instruments in detail.
Answer
Sign in to view the complete answer paper.
Draw the circuit diagram of Spectrum Analyzers and explain its operation in detail.
Answer
Sign in to view the complete answer paper.
Draw the circuit diagram of Function Generator and explain its operation.
Answer
Sign in to view the complete answer paper.
List out the different modes of operation of Harmonic Distortion Analyzers and explain any one mode in detail.
Answer
Sign in to view the complete answer paper.
What is Heterodyne and explain the operation of Heterodyne wave analyzer along with its circuit diagram.
Answer
Sign in to view the complete answer paper.
Draw the block diagram of Digital Readout oscilloscope and explain its operation in detail.
Answer
Sign in to view the complete answer paper.
Draw the block diagram of storage oscilloscope and explain the operation of each block in detail.
Answer
Sign in to view the complete answer paper.
Explain the Vertical amplifier section of CRT along with Block diagram.
Answer
Sign in to view the complete answer paper.
Draw the circuit diagram of Dual Trace oscilloscope and explain its operation in detail.
Answer
Sign in to view the complete answer paper.
What is the difference between photo-emissive, photo-conductive and photovoltaic transducers?
Answer
Sign in to view the complete answer paper.
Explain the following terms in detail: (i) Thermistors (ii) Sensistors
Answer
Sign in to view the complete answer paper.
Explain the Resistive position Transducer along with circuit diagram.
Answer
Sign in to view the complete answer paper.
Draw the circuit diagram of LVDT and explain the operation of it in detail.
Answer
Sign in to view the complete answer paper.
Explain the principle and working of ultrasonic Level gauge along with circuit diagram.
Answer
Sign in to view the complete answer paper.
Define Humidity and give a classification. Explain the procedure for the measurement of humidity.
Answer
Sign in to view the complete answer paper.
Explain the operation of Capacitance Comparison Bridge and derive the condition for balance of a Bridge.
Answer
Sign in to view the complete answer paper.
Describe the measurement of force with suitable example.
Answer
Sign in to view the complete answer paper.