MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Analytical Instrumentation knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Michelson’s interferometer, the __________ of the detector output will depend upon the intensity of incoming radiation. |
| A. | Velocity |
| B. | Frequency |
| C. | Amplitude |
| D. | Phase |
| Answer» D. Phase | |
| 2. |
In Michelson’s interferometer, the frequency of the detector output can be determined by translating the _________ of movable mirror and the ___________ of monochromatic radiation. |
| A. | Velocity, wavelength |
| B. | Thickness, intensity |
| C. | Length, velocity |
| D. | Angle, intensity |
| Answer» B. Thickness, intensity | |
| 3. |
The diagram given below is the representation of Fourier transform interferometer. Identify the missing block in the block diagram. |
| A. | Pyroelectric crystal |
| B. | Display |
| C. | High speed plotter |
| D. | A/D converter |
| Answer» E. | |
| 4. |
In Michelson Interferometer, if the reflected and transmitted beams are in phase at the beam splitter, then maximum intensity will reach the detector. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Which of the following is not the function of the drive mechanism in Fourier Transform Infrared Spectrophotometer? |
| A. | Movement of mirror to obtain a satisfactory interferogram |
| B. | Acquire a good interferogram pattern |
| C. | Allow 50% of the beam to pass |
| D. | Keep the speed of the moving mirror constant |
| Answer» D. Keep the speed of the moving mirror constant | |
| 6. |
In the most widely used beam splitter, a thin film of ________ is sandwiched between two plates of low refractive index solid. Fill the blank with a suitable option. |
| A. | Mylar |
| B. | Silicon carbide |
| C. | Ferrous oxide |
| D. | Silver chloride |
| Answer» B. Silicon carbide | |
| 7. |
IN_MICHELSON_INTERFEROMETER,_IF_THE_REFLECTED_AND_TRANSMITTED_BEAMS_ARE_IN_PHASE_AT_THE_BEAM_SPLITTER,_THEN_MAXIMUM_INTENSITY_WILL_REACH_THE_DETECTOR.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
In Michelson’s interferometer, the frequency of the detector output can be determined by translating the _________ of movable mirror and the ___________ of monochromatic radiation.$# |
| A. | Velocity, wavelength |
| B. | Thickness, intensity |
| C. | Length, velocity |
| D. | Angle, intensity |
| Answer» B. Thickness, intensity | |
| 9. |
Why is the computer necessary in Fourier Transform Spectrometer? |
| A. | To display the detector output |
| B. | To process the detector output |
| C. | To determine the amplitude |
| D. | To determine the frequency |
| Answer» C. To determine the amplitude | |
| 10. |
In_Michelson’s_interferometer,_the____________of_the_detector_output_will_depend_upon_the_intensity_of_incoming_radiation.$ |
| A. | Velocity |
| B. | Frequency |
| C. | Amplitude |
| D. | Phase |
| Answer» D. Phase | |
| 11. |
Which of the following is the reference that is generally used in FTIR interferometer? |
| A. | Air |
| B. | NaCl solution |
| C. | Alcohol |
| D. | Base solution |
| Answer» B. NaCl solution | |
| 12. |
Computer accepts analog signals directly. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Which of the following has to be computed to determine transmittance and absorbance at various frequencies? |
| A. | Ratio of signal and noise |
| B. | Ratio of sample and reference spectra |
| C. | Sample spectra |
| D. | Reference spectra |
| Answer» C. Sample spectra | |
| 14. |
Which of the following is not the advantage of Fourier Transform Spectrometers? |
| A. | Signal to noise ratio is high |
| B. | Information could be obtained on all frequencies |
| C. | Retrieval of data is possible |
| D. | Easy to maintain |
| Answer» E. | |
| 15. |
Only pyroelectric transducer or pyroelectric crystals are used as detectors in Fourier Transform Infrared Spectrophotometer (FTIR). What is the main reason for other types of thermal detectors are not being used in FTIR spectrophotometer? |
| A. | Less accuracy |
| B. | Slower response |
| C. | Less precision |
| D. | Less sensitivity |
| Answer» C. Less precision | |
| 16. |
Which of the following is not the function of drive mechanism in Fourier Transform Infrared Spectrophotometer? |
| A. | Movement of mirror to obtain a satisfactory interferogram |
| B. | Acquire a good interferogram pattern |
| C. | Allow 50% of the beam to pass |
| D. | Keep the speed of the moving mirror constant |
| Answer» D. Keep the speed of the moving mirror constant | |
| 17. |
In the most widely used beam splitter, a thin film of ________ is sandwiched between two plates of low refractive index solid. Fill the blank with the suitable option. |
| A. | Mylar |
| B. | Silicon carbide |
| C. | Ferrous oxide |
| D. | Silver chloride |
| Answer» B. Silicon carbide | |
| 18. |
Which of the following is not true about Fourier Transform Infrared (FTIR) spectrometer? |
| A. | It is of non-dispersive type |
| B. | It is useful where repetitive analysis is required |
| C. | Size has been reduced over the years |
| D. | Size has increased over the years |
| Answer» E. | |