Electronic Instruments and Measurements - Dec 2014
Electronics Engineering (Semester 3)
TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.
1 (a) Draw and explain the working of practical Q-meter circuit.(5 marks)
1 (b) Define the following terms:
v) Sensitivity(5 marks) 1 (c) Estimate the bandwidth of CRO if a signal of 12 milisecond rise time is observed as the signal with 15 millisecond rise time.(5 marks) 1 (d) Draw and explain the McLeod gauge for pressure measurement.(5 marks) 2 (a) Write short note on "Programmable logic controller".(10 marks) 2 (b) Draw and explain the turbine flow meter.(10 marks) 3 (a) Explain the following terms related to thermocouples:
i) Law of intermediate metals.
ii) Law of intermediate temperature.(10 marks) 3 (b) Draw and explain the block diagram of DSO.(10 marks) 4 (a) Draw and explain the following bridges:
i) Maxwell bridge
ii) Schering bridge(10 marks) 4 (b) What are the types of errors in measurement system? Explain all in detail.(10 marks) 5 (a) How the Lissajous figure are used for measurement of frequency and phase of the signal using CRO? Explain in detail.(10 marks) 5 (b) Draw and explain the construction and working of electronic voltmeter using transistors.(10 marks) 6 (a) Ultrasonic type level transducers.(5 marks) 6 (b) Displacement measurement using potentiometers.(5 marks) 6 (c) Data acquisition system.(5 marks) 6 (d) Specification of CRO.(5 marks)