InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The klystron body is insulated from ground by an insulating gas casket.(a) True(b) FalseThis question was addressed to me in quiz.The query is from Instrumentation of ESR Spectrometer topic in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct answer is (a) True |
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| 2. |
The magnet used in ESR spectrometer provides a magnetic field which can be varied from ________ to _______(a) 20 mgauss, 100mgauss(b) 200 mgauss, 20kgauss(c) 20 mgauss, 20kgauss(d) 100 mgauss, 10kgaussI have been asked this question in exam.Question is taken from Instrumentation of ESR Spectrometer in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct choice is (b) 200 mgauss, 20kgauss |
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| 3. |
When klystron frequency is close to the cavity resonant frequency, much less power is reflected from the cavity to the diode.(a) True(b) FalseI had been asked this question during an internship interview.This intriguing question originated from Basic ESR Spectrometer in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» CORRECT choice is (a) True Easy EXPLANATION: When klystron frequency is close to the cavity resonant frequency, much less POWER is reflected from the cavity to the diode. It RESULTS in a dip in a power mode. |
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| 4. |
What does AFC stand for?(a) Auto frequency correct(b) Automated frequency correct(c) Automatic frequency control(d) Automatic frequency circuitThe question was asked by my school principal while I was bunking the class.I want to ask this question from Instrumentation of ESR Spectrometer in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct choice is (C) Automatic FREQUENCY CONTROL |
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| 5. |
Which of the following oscillator is used as 1230 Hz oscillator?(a) Hartley oscillator(b) Crystal oscillator(c) RC oscillator(d) Wien bridge oscillatorThis question was addressed to me in quiz.I'd like to ask this question from Instrumentation of ESR Spectrometer topic in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct choice is (d) Wien bridge oscillator |
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| 6. |
Which of the following is also known as reflex oscillator?(a) Triode(b) Pentode(c) Special tube(d) Klystron tubeI had been asked this question in semester exam.The origin of the question is Basic ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The CORRECT ANSWER is (d) Klystron tube |
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| 7. |
The population ratio can be given by which of the following laws?(a) Bohr law(b) Beer-Lambert law(c) Kelvin law(d) Boltzmann lawI got this question in an interview for internship.My query is from Electron Spin Resonance in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» RIGHT answer is (d) Boltzmann law The best I can explain: The population RATIO can be given by Boltzmann law. ‘K’ is the Boltzmann CONSTANT. |
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| 8. |
Electron spin resonance involves detecting the detection of a physical phenomenon of _________ of electromagnetic radiation.(a) Adsorption(b) Absorption(c) Radiation(d) ReflectionThis question was posed to me in examination.This question is from Electron Spin Resonance in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Right option is (a) Adsorption |
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| 9. |
The oscilloscope is used to display the klystron mode.(a) True(b) FalseThe question was asked during an internship interview.The origin of the question is Instrumentation of ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The CORRECT choice is (a) True |
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| 10. |
Which of the following is the operating frequency of the ESR spectrometer?(a) 1.7 to 3.4 GHz(b) 1.5 to 4.2 GHz(c) 3.2 to 5.4 GHz(d) 8.8 to 9.6 GHzI got this question in class test.My question is taken from Basic ESR Spectrometer topic in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» CORRECT ANSWER is (d) 8.8 to 9.6 GHz Best explanation: The operating FREQUENCY of the ESR spectrometer is 8.8 to 9.6 GHz. It is an important PARAMETER. |
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| 11. |
The sensitivity of measurement is greatly enhanced by using which of the following?(a) High magnetic field(b) Low magnetic field(c) High electric field(d) Low electric fieldThe question was posed to me during an online exam.Question is from Electron Spin Resonance in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct ANSWER is (a) High MAGNETIC FIELD |
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| 12. |
If a weaker radiofrequency alternating magnetic field, having the frequency of precession of the electron is applied at right angles to fixed magnetic field, which of the following occurs?(a) Fragmentation(b) Scattering(c) Resonance(d) AbsorptionI had been asked this question during a job interview.This is a very interesting question from Electron Spin Resonance in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» RIGHT answer is (c) Resonance Explanation: Resonance occurs when a WEAKER radiofrequency alternating magnetic field with the frequency of PRECESSION of the electron is APPLIED at right angles to a fixed magnetic field. |
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| 13. |
The cavity resonant frequency should be equal to which of the following?(a) Frequency of electric field(b) Klystron frequency(c) Frequency of magnetic field(d) Mechanical frequencyThis question was addressed to me in semester exam.My question comes from Basic ESR Spectrometer topic in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Right ANSWER is (b) KLYSTRON FREQUENCY |
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| 14. |
Microwave frequency can be tuned over a small range by adjusting the distance between which of the following?(a) Cathode and anode(b) Anode and the reflector(c) Cathode and the reflector(d) Cathode and gridThis question was posed to me by my school teacher while I was bunking the class.This interesting question is from Basic ESR Spectrometer topic in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct choice is (C) Cathode and the REFLECTOR |
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| 15. |
The value of the magnetic moment is known as which of the following?(a) Thompson magneton(b) Bohr magneton(c) Goldstein magneton(d) Rutherford magnetonThe question was posed to me during a job interview.The above asked question is from Electron Spin Resonance in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» RIGHT CHOICE is (b) Bohr magneton The explanation: Electron SPIN RESONANCE is based on the spin associated with the electron. There is a magnetic moment the VALUE of which is known as Bohr magneton. |
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| 16. |
ESR is remarkably sensitive when compared with NMR.(a) True(b) FalseThe question was posed to me by my school teacher while I was bunking the class.Query is from Electron Spin Resonance in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct choice is (a) True |
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| 17. |
Which of the following sensor is used in ESR spectrometer?(a) Hall-effect sensor(b) Load cell(c) Strain gauge(d) Bourdon gaugeI have been asked this question in an interview.Asked question is from Instrumentation of ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» CORRECT option is (a) Hall-effect sensor Explanation: Hall-effect sensor is USED in ESR spectrometer. It is given as an INPUT to the SUMMATION circuit. |
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| 18. |
Which of the following is adjusted as a fine control for frequency tuning?(a) Cathode(b) Anode(c) Reflector voltage(d) GridThis question was posed to me by my school principal while I was bunking the class.My question is taken from Basic ESR Spectrometer topic in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The CORRECT choice is (C) Reflector VOLTAGE |
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| 19. |
The output of the klystron does not pass through which of the following?(a) Isolator(b) Reflector(c) Power leveller(d) Directional couplerThe question was asked during a job interview.My doubt stems from Basic ESR Spectrometer in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The CORRECT option is (b) REFLECTOR |
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| 20. |
In which of the following ranges will the receiver time constant of the ESR spectrometer lie?(a) 0 to 10 s(b) 0.3 to 1 s(c) 0.03 to 10 s(d) 0.003 to 100 sThe question was asked during an interview.I'd like to ask this question from Instrumentation of ESR Spectrometer topic in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» CORRECT option is (d) 0.003 to 100 s To EXPLAIN I WOULD say: The receiver time constant of the ESR SPECTROMETER lies from 0.003 to 100 s. It is one of the important parameters of ESR spectrometer. |
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| 21. |
At which of the following frequencies is the magnetic field at the sample modulated?(a) 1 kHz(b) 10 kHz(c) 100 kHz(d) 1000 kHzI had been asked this question in exam.Asked question is from Basic ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct answer is (c) 100 KHZ |
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| 22. |
In the sample cell, which of the following is selected to give maximum optical transmission in the UV-visible region?(a) Tungsten(b) Quartz(c) Phosphor(d) PotassiumThis question was posed to me in an interview for internship.This interesting question is from Instrumentation of ESR Spectrometer topic in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The CORRECT answer is (b) Quartz |
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| 23. |
Which of the following removes residual harmonics from the phase-detected signal?(a) High-pass filter(b) Low-pass filter(c) Band-pass filter(d) ChopperI got this question by my school principal while I was bunking the class.I need to ask this question from Instrumentation of ESR Spectrometer topic in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Right ANSWER is (b) Low-pass FILTER |
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| 24. |
In basic ESR spectrometer, the cavity length is adjustable.(a) True(b) FalseThis question was addressed to me in semester exam.Question is taken from Basic ESR Spectrometer in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct answer is (b) False |
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| 25. |
ESR sensitivity increases with __________ temperature and with _________ magnetic field strength.(a) Increasing, increasing(b) Increasing, decreasing(c) Decreasing, increasing(d) Decreasing, decreasingThis question was addressed to me by my school principal while I was bunking the class.Enquiry is from Electron Spin Resonance topic in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» RIGHT answer is (c) DECREASING, increasing The explanation: ESR SENSITIVITY increases with decreasing temperature and with increasing magnetic FIELD strength. ESR sensitivity means net absorption. |
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| 26. |
Given below is the diagram of Klystron tube. Identify the component.(a) Cathode(b) Anode(c) Grid(d) Reflector electrodeI got this question by my college professor while I was bunking the class.This intriguing question originated from Basic ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» RIGHT ANSWER is (d) REFLECTOR electrode Explanation: The component is the reflector electrode. CATHODE is on the left side and ANODE is in the middle. |
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| 27. |
Reflex klystron is used in which of the following frequency ranges?(a) 1000 to 2000 MHz(b) 1000 to 10000 MHz(c) 1000 to 15000 MHz(d) 1000 to 20000 MHzI have been asked this question in quiz.Question is from Electron Spin Resonance topic in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct answer is (d) 1000 to 20000 MHz |
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| 28. |
Microwaves reflected back from the cavity are routed to which of the following?(a) Attenuator(b) Klystron(c) Load(d) Diode detectorThe question was posed to me in unit test.Origin of the question is Basic ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct option is (d) DIODE detector |
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| 29. |
The 100 kHz oscillator acts as which of the following?(a) Transmitter(b) Receiver(c) Modulator(d) Transmitter and receiverThis question was addressed to me during an online interview.The above asked question is from Instrumentation of ESR Spectrometer in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Right option is (d) Transmitter and receiver |
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| 30. |
Under ideal conditions, a commercial X-band spectrometer can detect of the order of which of the following number of spins at room temperature?(a) 10^1(b) 10^5(c) 10^10(d) 10^12I got this question in class test.My doubt is from Electron Spin Resonance topic in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The CORRECT option is (d) 10^12 |
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| 31. |
When the electrons are aligned either parallel or antiparallel to the direction of the external magnetic field, the electrons will precess about the axis at a frequency that is proportional to which of the following?(a) Applied magnetic field(b) Electron magnetic moment(c) Applied magnetic field and electron magnetic moment(d) Neither applied magnetic field not electron magnetic momentI have been asked this question during an online exam.My question comes from Electron Spin Resonance topic in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» RIGHT answer is (c) Applied magnetic field and electron magnetic moment Best explanation: When the ELECTRONS are aligned EITHER parallel or ANTIPARALLEL to the direction of external magnetic field, the electrons will start to precess about the axis at a frequency that is proportional to both applied magnetic field and electron magnetic moment. |
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| 32. |
From which of the following are electrons emitted in the klystron tube?(a) Cathode(b) Anode(c) Grid(d) Reflector electrodeThe question was posed to me in an international level competition.My question comes from Basic ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct CHOICE is (a) Cathode |
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| 33. |
Microwaves are generated by __________ and the power level is adjusted with the ________(a) Triode, rectifier(b) Pentode, attenuator(c) Klystron tube, attenuator(d) Diode, rectifierThis question was posed to me in class test.I would like to ask this question from Basic ESR Spectrometer topic in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct option is (c) KLYSTRON tube, attenuator |
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| 34. |
Klystron can generate power in which of the following ranges?(a) 10 – 100 mW(b) 10 – 200 mW(c) 10 – 500 mW(d) 100 – 400 mWThe question was asked during an interview for a job.Asked question is from Electron Spin Resonance in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» CORRECT CHOICE is (c) 10 – 500 mW The explanation: Klystron can generate POWER in the RANGE of 10-500 mW. It is a low power device. |
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| 35. |
When a strong magnetic field is applied to the unpaired spins of an electron, the electrons will be split into two groups.(a) True(b) FalseI had been asked this question in unit test.I'd like to ask this question from Electron Spin Resonance topic in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct CHOICE is (a) True |
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| 36. |
Which of the following is the modulation amplitude range of ESR spectrometer?(a) 1mG to 10G(b) 2mG to 15G(c) 3mG to 20G(d) 5mG to 40GThis question was posed to me during a job interview.This interesting question is from Instrumentation of ESR Spectrometer in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» CORRECT answer is (d) 5mG to 40G Easiest EXPLANATION: 5mG to 40G is the MODULATION AMPLITUDE range of ESR spectrometer. It is applied in steps. |
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| 37. |
Which of the following is used as detector crystal in ESR spectrometer?(a) Silicon rectifier(b) Silicon tungsten rectifier(c) Silicon boron rectifier(d) Silicon quartz rectifierThe question was asked in an online quiz.My query is from Instrumentation of ESR Spectrometer in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct answer is (B) Silicon tungsten RECTIFIER |
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| 38. |
By introducing which of the following, signal-to-noise ratio can be improved?(a) Small amplitude field modulation(b) Large amplitude field modulation(c) Small amplitude field attenuation(d) Large amplitude field attenuationThis question was addressed to me in exam.The above asked question is from Basic ESR Spectrometer topic in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct option is (a) Small amplitude field modulation |
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| 39. |
Waveguides look like _________ cross-section pipes with dimensions of the order of the wavelength to be transmitted.(a) Triangular(b) Circular(c) Rectangular(d) SquareThis question was addressed to me in a national level competition.Origin of the question is Electron Spin Resonance in division Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The CORRECT option is (C) RECTANGULAR |
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| 40. |
Which of the following routes are the microwaves entering from the klystron towards the cavity?(a) Oscillator(b) Attenuator(c) Circulator(d) ReflectorThe question was posed to me in unit test.I need to ask this question from Basic ESR Spectrometer in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» The correct OPTION is (c) CIRCULATOR |
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| 41. |
Klystron requires _______ for the klystron beam and up to _____ for the klystron reflector.(a) +400 V, -730 V(b) +650 V, -400 V(c) +200 V,-530 V(d) +180 V,-270 VThe question was asked during an interview for a job.My enquiry is from Instrumentation of ESR Spectrometer in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct ANSWER is (B) +650 V, -400 V |
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| 42. |
Which of the following is the oscilloscope field width of the ESR spectrometer?(a) 0.2 to 40 G(b) 0.1 to 20 G(c) 0 to 10 G(d) 0.01 to 20 GI had been asked this question by my school principal while I was bunking the class.This question is from Instrumentation of ESR Spectrometer in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Right choice is (a) 0.2 to 40 G |
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| 43. |
Electron spin resonance is also known as which of the following?(a) Electron paramagnetic resonance(b) Electron diamagnetic resonance(c) Electron paramagnetic reoccurrence(d) Electron diamagnetic reoccurrenceI had been asked this question in an interview for internship.Query is from Electron Spin Resonance in chapter Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Right OPTION is (a) ELECTRON paramagnetic RESONANCE |
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| 44. |
After detection, the resulting signal will have which of the following frequencies?(a) 1 kHz(b) 10 kHz(c) 100 kHz(d) 1000 kHzI had been asked this question in an online interview.This question is from Instrumentation of ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» CORRECT answer is (c) 100 kHz For explanation I would say: After detection, the resulting signal will have 100 kHz. It contains ESR INFORMATION. |
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| 45. |
If the population of ground state exceeds the population of the excited state a net absorption of __________ radiation takes place.(a) Infrared(b) Ultraviolet(c) Microwave(d) X-rayThe question was asked during an online interview.My question is based upon Electron Spin Resonance topic in section Electron Spin Resonance Spectrometers of Analytical Instrumentation |
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Answer» Correct OPTION is (c) Microwave |
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