Bangalore University 2010-5th Sem Diploma Instrumentation & Control Engineering Electronic Measurements & Testing Instruments - Iester , - Question Paper

I & C. Board

Electronic Measurements and Testing Instruments

 

Time : 3 Hours Max. Marks : 100

 

Instructions : 1. Section I is compulsory

2.                  Answer any six full questions choosing two questions each from

Section II, III and IV.

 

SECTION I

 

1. (a) Fill in the blanks with appropriate word / words :

(i) At low frequencies the detector used in AC bridges are ______ .

(ii) Digital multimeter has ____ input impedance.

(iii)             The output of the inverter is connected to the load in ___ UPS.

(iv)             The CRO depends on the movement of an _____ .

(v)               Measurement of frequency and phase is done by using _____ produced on a screen.

 

(b) Explain the operation of UPS with diagram.

 

SECTION II

 

2. (a) Derive an expression for the unknown resistance using wheat stone bridge.

(b) Explain briefly about detectors used in bridges.

(c) What are the conditions to be satisfied for balancing bridges ?

 

3 (a) Explain the operation of three terminal IC Regulator with Block diagram.

(b) Explain the operation of series voltage regulator using transistor.

(c) Write a note on Hot test of power supply unit.

 

4. (a) Explain the operation of SMPS with diagram.

(b) Explain the operation of zener diode voltage regulator.

(c) Mention the applications of Q-meter.

 

SECTION III

 

5. (a) Explain the block diagram of Electronic multimeter.

(b) Mention the advantages of Digital multimeter over Analog multimeter.

(c) List any six specifications of DMM.

 

6. (a) Explain the block diagram of CRO.

(b) Explain briefly the working of vertical deflection system.

(c) Write a note on measurement of voltage using CRO.

 

7. (a) Explain the working of storage oscilloscope with diagram.

(b) Explain the measurement of frequency by CRO.

(c) List any three faults and remedies in the DMM.

 

SECTION IV

 

8. (a) Explain the operation of Function generator with diagram.

(b) Explain briefly about Audio signal generator.

(c) List the differences between pulse and square wave generator.

 

9. (a) Explain the operation of Heterodyne wave analyzer with diagram.

(b) Explain briefly about spectrum analyzer.

(c) Write a note on trouble shooting procedure for signal generator.

 

10. (a) Explain the block diagram of logic pulse.

(b) Write a note on safety measures against mechanical hazards.

(c) Mention the applications of logic probe.

 

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