JNTU
JNTU B.Tech II TRANSDUCERS AND INSTRUMENTATION Previous Question Paper (April - 2018 - R13)
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.
Part A
Write the working principle of LVDT.
Answer
The LVDT operates on the principle of mutual induction. It consists of a primary winding and two secondary windings wound on a hollow cylindrical former. When an AC excitation is applied to the primary, the movement of a magnetic core changes the flux linkage between the primary and the secondary windings, producing a differential output voltage proportional to the core displacement.
What is the principle of electromagnetic velocity sensors?
Answer
Electromagnetic velocity sensors operate on Faraday's law of electromagnetic induction. When a conductor moves through a magnetic field, an electromotive force (EMF) is induced in the conductor. The magnitude of this induced voltage is directly proportional to the rate of change of magnetic flux, which is proportional to the velocity of the moving member.
Define charge sensitivity and voltage sensitivity of piezoelectric transducers.
Answer
Sign in to view the complete answer paper.
What is the working of bonded strain gauge type torque sensor?
Answer
Sign in to view the complete answer paper.
List the advantages of electronic volt meters.
Answer
Sign in to view the complete answer paper.
Write the balancing equations of Scherings Bridge?
Answer
Sign in to view the complete answer paper.
List the applications of wave analyzers.
Answer
Sign in to view the complete answer paper.
What is the working principle of ultrasonic densitometer?
Answer
Sign in to view the complete answer paper.
What is the working of a rotary transformer?
Answer
Sign in to view the complete answer paper.
Write the advantages optical fiber data transmission.
Answer
Sign in to view the complete answer paper.
Part B
Explain the principle and working of strain gauges with measuring circuits and derive the expression for gauge factor of strain gauge.
Answer
Sign in to view the complete answer paper.
Describe the principle and working of laser and stroboscopic methods for measurement of speed.
Answer
Sign in to view the complete answer paper.
Describe the principle and working of piezoelectric transducers and derive the expression for its output voltage with the help of its equivalent circuit.
Answer
Sign in to view the complete answer paper.
Explain the working accelerometer with necessary diagram.
Answer
Sign in to view the complete answer paper.
Explain the principle and working of variable reluctance and differential transformers for force measurement.
Answer
Sign in to view the complete answer paper.
Describe the construction and working of bonded strain gauge type torque measurement system.
Answer
Sign in to view the complete answer paper.
Explain the working of a piezoelectric transducers for force measurement with a neat diagram.
Answer
Sign in to view the complete answer paper.
Write the advantages and disadvantages of piezoelectric transducer.
Answer
Sign in to view the complete answer paper.
Explain the construction and working of thermocouple type voltmeters with a neat schematic.
Answer
Sign in to view the complete answer paper.
Draw the neat diagram of Maxwell’s AC bridge for measurement of unknown inductance and derive the expressions for its balance.
Answer
Sign in to view the complete answer paper.
Explain various methods for extension of ranges of ammeters and voltmeters with neat diagrams.
Answer
Sign in to view the complete answer paper.
Draw the neat schematic of Schering’s AC bridge for measurement of unknown capacitance.
Answer
Sign in to view the complete answer paper.
Explain the principle and working of frequency synthesizer with a neat schematic and mention its applications.
Answer
Sign in to view the complete answer paper.
Explain the principle and working of a null balance type PH meter with a neat schematic diagram.
Answer
Sign in to view the complete answer paper.
Draw the block diagrams of wave analyzer and explain its working and applications.
Answer
Sign in to view the complete answer paper.
Explain the working of ultrasonic densitometer with a neat sketch and discuss its advantages and disadvantages.
Answer
Sign in to view the complete answer paper.
Discuss various data transmission techniques used in analog and digital signals using fiber and radio telemetry.
Answer
Sign in to view the complete answer paper.
Explain with a neat schematic of pneumatic data transmission system and mention its advantages and disadvantages.
Answer
Sign in to view the complete answer paper.
Explain the working a synchro position repeater and rotary transformers for data transmission.
Answer
Sign in to view the complete answer paper.
Describe different techniques for digital data transmission with neat diagrams and mention their relative merits.
Answer
Sign in to view the complete answer paper.