Test and Measurement Tools Oral Questions

1.) Calibration techniques

1)  What is calibration?

2) What are types of calibration?

3)  What is traceability? List the standards of calibration.

4) What is zero error?

5) How will you design and calibrate meter for AC voltage measurement?

6) Explain DC current calibration.

7) Name meter which is used as STD meter in LAB.

8)  Explain why calibration is needed?

9) Define sensitivity.

10) How will you select standard of calibration?

                11) What are the standards for calibration?
           

2.) Spectrum Analyzer

            1) What is a spectrum analyzer?

            2) Explain functional block diagram of spectrum analyzer.

            3) What are different functions available on Spectrum  analyzer.

            4) What is resolution bandwidth of spectrum analyzer?

            5) Write technical specifications of Spectrum analyzer.

            6) Can you test frequency response of filters on spectrum analyzer.

7) List out applications of spectrum analyzer.

8) What is tracking generator?

9)State applications of tracking generator.

10)How will you set following controls: i)Frequency  ii)Span  iii) Amplitude

11)What are the harmonics present in the triangular waveform?

3) Logic analyzer:

1)    What is a Logic analyzer?

2)    list technical specifications of logic analyzer.

3) What are two modes of operation of logic analyzer?

4)    When will you select DSO and when to select Logic analyzer?

5) What are applications of Logic analyzer?

           6) What are the uses of timing diagram and explain what is state diagram?

7) Name the different controls on logic analyzer.

8) Name microcontroller kit used in exp. of logic analyzer.

9) What  are different triggering modes of logic analyzer.

10) Explain how triggering modes are useful in debugging?

4) Labview :

1)    In what applications lab view is suitable?

2)    What is lab view? How it is useful in measurements & testing?

3)    What are different front panel controls in lab view?

4)    Explain typical measurement set up in lab view?

5)    What different types of analysis are available in lab view?

6)    In what different way external bandwidth circuit can be connected to a lab view set up? What are different functions available in lab view?

5) Frequency counter :

1)What is a frequency counter?

2)What is gating error?

3)What is the range of frequency counter used in the lab?

4)Define sensitivity of frequency counter?

5)State & explain resolution of your frequency counter?

6)State different types time base (Gating) used in frequency counter?  

7)What are different types of measurements you made with frequency counter?

8)List out different types of errors occurring during frequency and time      measurement.

9)List technical specifications of frequency counter you have used.

6)Digital Storage Oscilloscope :

1)What are different types of oscilloscopes?

2)Differentiate between Analog and digital CRO.

3)What is DSO? Explain with block diagram.

4)What are applications of DSO?

5)List  important specifications of DSO used in LAB.

6)What is ROLL mode?

7)What are different windows available in FFT function in DSO.

8)Which window is useful for good frequency resolution?

9)What type of ADC is used in DSO?

10)How sampling rate of DSO changes with Time/division control?

11)What are different types of sampling? State  application of each.

12)What is acquisition memory?

13) When to select logic analyser & when to select DSO?

14) Which mathematical functions are available on the DSO?

15)What is the bandwidth of DSO used in the lab?

16) What is the input impedance of DSO & also that of the probes of DSO?

7) STUDY OF TRUE RMS  METER

1) What is RMS?

2) What is true RMS?

3) What is relation between Peak and average of various waveforms.

4) What is peak factor?

5) What is form factor?

6) What is crest factor?

7) What is working principle of true RMS meter?

8) What are applications of true RMS meter?

9) If pure sine wave is applied to rms and true rms meter, then what should be the readings on both meters?

10) What are technical specifications of true RMS Meter?

11) Explain why nonsinusoidal waveforms are accurately measured on true RMS meter.

12)What do you mean by average responding meters?

                13) What is the difference between RMS and TRUE RMS?

8)Study of LCR Q meter :

1)  What is the working principle of LCR Q METER?

2) What is Q?

3) Define dissipation factor.

4) What are test frequencies on LCR Q meter?

5) What are different connection methods ?

6) How to determine the method of connection?

7) List important specifications of Q meter.

8) what are applications of Q meter?

9) What is manufacturer of LCR Q meter?

10) Explain series resonance.

11) How will you measure effective resistance using LCR Q meter?

12) What is stray capacitance?

9) Statistical Analysis :

1) Statistical analysis is done for which types of errors and why?

2) What do you mean by gross error?

3) State and explain three major categories of errors?

4) A person using ohmmeter reads the measured value as 100 ohms when actual value is 10 ohm. What kind of error does this represent?

5) Define accuracy, precision,deviation & mean.

6) Define sensitivity, resolution with example.

7) What is probable error for one reading?

8) What are advantages of 61/2 digit DMM over 31/2?

9) Write important specifications of 61/2 digit DMM.

10) What is a histogram & What conclusion can you draw from Histogram?

11) What are different parameters you can measure with 61/2 digit DMM.

12) Define arithmetic Mean, average value ,standard deviation and Variance.

Note:  Study of manufacturers and front panels of the following instruments is a must:

1)    DSO

2)    Logic analyzer

3)    Spectrum analyzer

4)    6 ½  DMM

5)    LCR Q meter