InterviewSolution
Saved Bookmarks
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.
| 51. |
Diffractometers are similar to which of the following?(a) Optical grating spectrometer(b) Prism spectrometer(c) Photo multiplier(d) Photovoltaic cellThe question was asked in an international level competition.I'm obligated to ask this question of X-Ray Diffractometers in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» CORRECT choice is (a) Optical grating spectrometer To elaborate: Diffractometers are SIMILAR to optical grating spectrometers. The DIFFERENCES are that LENSES and mirrors are not USED with X-rays. |
|
| 52. |
Which of the following can be done to avoid loss of intensities of X-rays due to the absorption of long wavelength X-rays?(a) Apparatus must be contained in a chamber(b) Air in the chamber must be replaced by helium(c) Inert gas atmosphere must be provided(d) Proper slits must be usedI had been asked this question in final exam.Question is from X-Ray Fluorescent Spectrometer in portion X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» RIGHT answer is (b) Air in the CHAMBER must be replaced by helium Best EXPLANATION: Air in the chamber must be replaced by helium to avoid loss of intensities of X-rays due to the ABSORPTION of long wavelength X-rays. Vacuum chambers can also be used. |
|
| 53. |
In X-ray fluorescence spectrometer, the relationship between the excitation intensity and the intensity of fluorescence does not depend on which of the following?(a) Spectrum of the incident radiation(b) Angle of radiance(c) Molecular weight(d) Incident angleThe question was posed to me in examination.My doubt stems from X-Ray Fluorescence Spectrometry topic in section X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» RIGHT choice is (d) Incident angle Explanation: In X-ray fluorescence spectrometer, the relationship between the excitation INTENSITY and the intensity of fluorescence does not depend on the incident angle. It depends on the ABSORPTION of PATH length. |
|
| 54. |
Prompt emission of X-ray by an atom ionised by a higher energy X-ray is a type of which of the following phenomena?(a) Luminescence(b) Fluorescence(c) Phosphorescence(d) Spontaneous emissionThis question was posed to me by my college director while I was bunking the class.The query is from X-Ray Fluorescence Spectrometry topic in portion X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» RIGHT option is (b) FLUORESCENCE Explanation: Prompt EMISSION of X-ray by an atom ionised by a higher energy X-ray is a type of fluorescence. Fluorescence EMISSIONS are characteristic of the particular ELEMENT. |
|
| 55. |
In powder method, the powder sample is contained in which of the following?(a) Thin walled glass capillary tubes(b) Thin walled test tube(c) Thin walled curvettes(d) Thin walled flaskI had been asked this question during an interview.I want to ask this question from X-Ray Diffractometers in division X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The correct OPTION is (a) Thin walled glass capillary tubes |
|
| 56. |
Using the powder method of diffractometers, which of the following can be determined?(a) Percentage of K+(b) Percentage of Na+ and Cl-(c) Percentage of KBr and NaCl(d) Percentage of Br-The question was asked in a national level competition.This interesting question is from X-Ray Diffractometers in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The CORRECT choice is (c) Percentage of KBr and NACL |
|
| 57. |
Using which of the following components is the generated x-rays focussed upon the specimen?(a) X-ray tube(b) Monochromator(c) Collimator(d) DetectorThis question was addressed to me during an interview for a job.The question is from Instrumentation of X-Ray Spectroscopy topic in section X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» CORRECT choice is (c) Collimator Easiest explanation: Collimator is USED to focus the GENERATED x-rays upon the SPECIMEN. The collimator is in between the specimen under ANALYSIS and the Coolidge tube. |
|
| 58. |
Given below is the diagram of energy dispersive system. Identify the unmarked component.(a) Lens(b) Specimen(c) Sample holder(d) Energy analyserI got this question in unit test.I'd like to ask this question from X-Ray Fluorescent Spectrometer topic in portion X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Right option is (B) SPECIMEN |
|
| 59. |
Which of the following components of the X-ray fluorescent spectrometer induces fluorescent radiation?(a) Excitation source(b) Energy analyser(c) X-ray spectrometer(d) Detection SystemThe question was posed to me in an internship interview.I want to ask this question from X-Ray Fluorescent Spectrometer in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The correct OPTION is (a) Excitation source |
|
| 60. |
The problem of spectral interference is not severe in X-ray spectroscopy.(a) True(b) FalseThe question was posed to me in an international level competition.My question is based upon X-Ray Fluorescence Spectrometry topic in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Right answer is (a) True |
|
| 61. |
If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long or a short time, the phenomenon is termed as which of the following?(a) Luminescence(b) Fluorescence(c) Phosphorescence(d) Spontaneous emissionThis question was addressed to me by my school principal while I was bunking the class.This is a very interesting question from X-Ray Fluorescence Spectrometry in portion X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The correct choice is (a) LUMINESCENCE |
|
| 62. |
Absorption meters cannot be used to detect broken bones.(a) True(b) FalseThis question was addressed to me in unit test.My question is taken from X-Ray Absorption Meter in division X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Correct choice is (b) False |
|
| 63. |
The cathode in the Coolidge tube is made of which of the following elements?(a) Quartz(b) Iron(c) Tungsten(d) BariumI got this question in an online interview.The question is from Instrumentation of X-Ray Spectroscopy in section X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» RIGHT choice is (c) Tungsten Easy explanation: The CATHODE in the COOLIDGE tube is made of tungsten. The ANODE is made of copper. |
|
| 64. |
Which of the following is not a type of optics employed in electron probe microanalyser?(a) Electron optics(b) Light optics(c) X-ray optics(d) Gamma opticsThis question was posed to me during a job interview.My question is taken from Electron Probe Microanalyser topic in portion X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The CORRECT answer is (d) Gamma optics |
|
| 65. |
To monitor the primary beam, which of the following is used?(a) Scintillation counter(b) GM counter(c) Gamma counter(d) Proportional counterThis question was addressed to me during an interview for a job.My question comes from Total Reflection X-Ray Fluorescence Spectrometer in portion X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» CORRECT CHOICE is (b) GM COUNTER The best explanation: To monitor the primary beam, Gm counter is used. It is placed in the specular reflection DIRECTION. |
|
| 66. |
Which of the following is the disadvantage of silicon semiconductor detector?(a) Low stable(b) Can be operated only at low temperatures(c) Have low count-rate(d) Low resolutionThis question was addressed to me in a national level competition.I need to ask this question from X-Ray Fluorescent Spectrometer in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The correct CHOICE is (B) Can be operated only at LOW temperatures |
|
| 67. |
Energy dispersive system uses which of the following detectors?(a) Optical detector(b) Semiconductor detector(c) Thermistor(d) BolometerThis question was posed to me in an online quiz.My question is based upon X-Ray Fluorescent Spectrometer in division X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The correct CHOICE is (B) Semiconductor detector |
|
| 68. |
If the absorption of electromagnetic radiation by matter results in the emission of radiation of the same or longer wavelengths for a long time, the phenomenon is termed as which of the following?(a) Luminescence(b) Fluorescence(c) Phosphorescence(d) Spontaneous emissionThis question was addressed to me in homework.My question comes from X-Ray Fluorescence Spectrometry topic in division X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The correct option is (C) Phosphorescence |
|
| 69. |
Which of the following components make use of a thin metal foil to isolate a nearly mono-energetic excitation beam?(a) Transmission-anode X-ray tube(b) Secondary fluorescence target(c) Slit(d) FiltersThis question was posed to me in an internship interview.My question is based upon X-Ray Fluorescent Spectrometer topic in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Correct choice is (d) Filters |
|
| 70. |
In absorption meter, which of the following is placed between the chopper and the reference cell?(a) Collimator(b) Filter(c) Photomultiplier tube(d) AttenuatorThis question was addressed to me in an interview for job.This is a very interesting question from X-Ray Absorption Meter in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» RIGHT answer is (d) Attenuator To elaborate: In absorption METER, attenuator is placed between the chopper and the reference cell. A variable thickness ALUMINIUM attenuator is USED. |
|
| 71. |
Which of the following is the most common instrument for photographic recording of diffraction patterns?(a) Debye-Scherrer powder camera(b) Gamma camera(c) Geiger tube(d) Scintillation counterThe question was posed to me during an interview.My question is from X-Ray Diffractometers in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Right choice is (a) Debye-Scherrer powder camera |
|
| 72. |
The alternative method using laser does not analyse vapours by which of the following methods?(a) Mass spectrometer(b) Optical emission(c) Absorption photometry(d) X-ray photometryI had been asked this question in an international level competition.The query is from Electron Probe Microanalyser in chapter X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Correct option is (d) X-ray photometry |
|
| 73. |
Total reflection X-ray fluorescence spectrometer is attractive for elements which lack reliable wet chemical methods.(a) True(b) FalseI have been asked this question during a job interview.This question is from Total Reflection X-Ray Fluorescence Spectrometer topic in division X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Right option is (a) True |
|
| 74. |
When certain geometric requirements are met, X-rays scattered from a crystalline solid can constructively interfere with each other and produce a diffracted beam.(a) True(b) FalseThis question was addressed to me during an interview.The above asked question is from X-Ray Diffractometers in portion X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» Correct answer is (a) True |
|
| 75. |
Which of the following is the limit of detectability of electron microprobe analyser?(a) 10-14 g(b) 10-140 g(c) 10-7 g(d) 10-70 gI had been asked this question in a national level competition.My enquiry is from Electron Probe Microanalyser topic in section X-Ray Spectrometers of Analytical Instrumentation |
|
Answer» The correct option is (a) 10-14 g |
|