Electronics Measurement & Instrumentation 2018 Question Paper — Gover…
The 2018 Electronics Measurement & Instrumentation previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Electronics Measurement & Instrumentation
- Course: Electrical Engg / (Electronics Measurements & Instrumentation)
- Branch: Electrical Engg
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting at least two questions from each Section.
- Each question carries 20 marks.
- Assume suitable data wherever missing.
Questions
Section - A
- Q1. (a) Draw the basic block diagram of an oscilloscope and explain the function of each block. (b) Describe with suitable diagrams how voltage, frequency and phase are measured with a CRO? [20 marks]
- Q2. (a) Describe the method for determination of B-H curve of a magnetic material using step by step method. (b) In a test on a specimen of total weight 13 kg, the measured values of iron loss at a given value of peak flux density, were 17.2 W at 40 Hz and 23.9W at 60 Hz. Estimate the values of hysteresis and eddy current losses in W/kg at 50 Hz for the same value of peak flux density. [20 marks]
- Q3. With the help of a neat block diagram explain the working of heterodyne type of wave analyzer. [20 marks]
- Q4. (a) Explain how an a.c. bridge is used for measurement of iron losses. (b) Describe salient features of a dual trace oscilloscope. [20 marks]
Section - B
- Q5. (a) Give the classification of transducer. (b) Describe the working of an L.V.D.T. What types of non-electric quantities that can be measured by an L.V.D.T.? (c) Vriefly describe a capacitive transducer. [20 marks]
- Q6. (a) What are the different types of potential dividers which are used in the measurement of high voltages? Explain the use of capacitive dividers at high voltage measurement. What are the factors which affect the accuracy of measurement? (b) Describe the precautions taken when using sphere gap for measurement of high voltages. Discuss the advantages and disadvantages of using sphere gap. [20 marks]
- Q7. (a) What are the different techniques for the measurement of frequency in the power frequency range? Explain the working of a mechanical resonance type frequency meter. (b) Describe the constructional details and working of a single phase electrodynamometer type of power factor meter. [20 marks]
- Q8. (a) Define gauge factor and derive its relationship with various components. (b) Draw circuit diagram of measuring temperature by thermocouple based transducer. Discuss its advantages. [20 marks]