Electrical measurement lab model questions for viva

viva questions and answers for electrical measurements lab

Measurement and Instrumentation Lab - VIVA QUESTIONS
EXPNO.1 MEASUREMENT OF RESISTANCE USING WHEATSTONE BRIDGE
Explain the operation of Wheatstone bridge.
Name two advantages of a Wheatstone bridge over an ordinary ohmmeter.
What is the range of resistance can be measured using Wheatstone bridge
What do u meant by sensitivity?
What do u meant by selectivity?
What do u meant by accuracy?
What are the limitations of this bridge?
What are the other methods used for measurement of medium resistance?
Why we use this method for measurement of medium resistance?

EXPNO.2 MEASUREMENT OF RESISTANCE KELVIN’S DOUBLE BRIDGE.
What is the difference between Kelvin’s Double Bridge and Wheatstone bridge?
Explain the operation of Kelvin’s Double Bridge.
Why this method is called as double bridge method?
Can this method be beneficial for measurement of low value of resistance or not?
What are the limitations of this bridge?
What is the range of resistance can be measured using Kelvin’s Double Bridge

EXPNO.3 MEASUREMENT OF CAPACITANCE USING SCHERING BRIDGE
Explain the operation of Schering Bridge
What are the limitations of this bridge?
What is the range of capacitance can be measured using this bridge.

EXPNO.4 MEASUREMENT OF INDUCTANCE USING MAXWELLS BRIDGE
What is the Q factor of the coil?
What is the range of Q?
Which bridges are used for measurement of inductances?
What are the limitations of this bridge?
What is the range of inductance can be measured using this bridge

EXPNO.5 INSTRUMENTATION AMPLIFIER
Explain the operation of Instrumentation Amplifier
What are advantages of Instrumentation Amplifier?
What are disadvantages of Instrumentation Amplifier?
What is the difference between differential Amplifier and Instrumentation Amplifier?

EXPNO.6 CALIBRATION OF 1Æ ENERGYMETER
Why MI meter is not used to measure d.c quantity?
What do you meant by calibration?
How to measure energy using energy meter?
How many watts equal to one unit?

EXPNO.7 MEASUREMENT OF 3 PHASE POWER AND POWER FACTOR
Define power factor.
What are the different methods to measure 3 phase power and power factor.
Why MI meter is not used to measure d.c quantity?
Explain about how the wattmeter is connected in the circuit to measure the power delivered to the Load and the Line.
Explain How the Resistive Power is measured by the Wattmeter Method
What do you mean by the 3phase wattmeter?

EXPNO.8 STUDY OF DISPLACEMENT TRANSDUCER – LVDT
What do you meant by transducer?
What is LVDT?
Explain the operation of LVDT.
What are advantages of LVDT?
What are disadvantages of LVDT?

EXPNO.9 STUDY OF PRESSURE TRANSDUCER
What do you meant by transducer?
Explain the operation of pressure transducer.
What are advantages of pressure transducer?
What are disadvantages of pressure transducer?

EXPNO.10 A/D CONVERTER
Explain the operation of A/D Converter.
What are the different types of A/D Converter?
Which one of A/D Converters is the best?
What are advantages of A/D Converter?
What are disadvantages of A/D Converter?
What are the applications of A/D Converter?

EXPNO.11 D/A CONVERTER
Explain the operation of D/A Converter.
What are the different types of D/A Converter?
Which one of D/A Converters is the best?
What are advantages of D/A Converter?
What are disadvantages of D/A Converter?
What are the applications of D/A Converter?

EXPNO.12 STUDY OF TRANSIENTS
What do you meant by Transients?
Obtain the expression of transient voltage and current in RC circuit.
Obtain the expression of transient voltage and current in RL circuit.

EXPNO.13 CALIBRATION OF CURRENT TRANSFORMER
What do you meant by calibration?
What are the applications of Current Transformer?
What are advantages of Current Transformer?


EXPNO.14 MEASUREMENT OF IRON LOSS (MAXWELL BRIDGE)
How Maxwell Inductance Bridge is used to measure the Iron loss?
What is the Q factor of the coil?
What is the range of Q?