MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
A 15.4 MHz crystal generates the _________ resonance frequency. |
| A. | Hydrogen |
| B. | Deuterium |
| C. | Tritium |
| D. | Helium |
| Answer» C. Tritium | |
| 2. |
Fourier transform can be accomplished by using which of the following components? |
| A. | Spin decoder |
| B. | Detector |
| C. | Spectrum analyser |
| D. | Oscilloscope |
| Answer» D. Oscilloscope | |
| 3. |
How can the need for an array of narrow-band filters and detectors be eliminated? |
| A. | By using multi-channel excitation |
| B. | By using a detector for each frequency |
| C. | By reducing the number of detectors |
| D. | By using Fourier transform |
| Answer» E. | |
| 4. |
Two coils are necessary for Fourier transform NMR spectroscopy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
FOURIER_TRANSFORM_CAN_BE_ACCOMPLISHED_BY_USING_WHICH_OF_THE_FOLLOWING_COMPONENTS??$ |
| A. | Spin decoder |
| B. | Detector |
| C. | Spectrum analyser |
| D. | Oscilloscope |
| Answer» D. Oscilloscope | |
| 6. |
A 15.4 MHz crystal generates the _________ resonance frequency?$ |
| A. | Hydrogen |
| B. | Deuterium |
| C. | Tritium |
| D. | Helium |
| Answer» C. Tritium | |
| 7. |
How can the need for array of narrow-band filters and detectors be eliminated? |
| A. | By using multi-channel excitation |
| B. | By using a detector for each frequency |
| C. | By reducing the number of detectors |
| D. | By using Fourier transform |
| Answer» E. | |
| 8. |
Which of the following is the disadvantage of multichannel excitation? |
| A. | Low sensitivity |
| B. | Low resolution |
| C. | Small number of frequencies is present |
| D. | Uneconomical |
| Answer» E. | |
| 9. |
Which of the following must be done to improve sensitivity? |
| A. | Frequency sweep mode must be preferred |
| B. | Field sweep mode must be preferred |
| C. | Single channel excitation must be preferred |
| D. | Multichannel excitation must be preferred |
| Answer» E. | |
| 10. |
Which of the following is the disadvantage of conventional mode of spectrometer or continuous-wave NMR spectrometer? |
| A. | They are unstable |
| B. | Maintenance is difficult |
| C. | High operating cost |
| D. | Excitation is inefficient |
| Answer» E. | |
| 11. |
Two coils are necessary in Fourier transform NMR spectroscopy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Which of the following cannot be done due to the multiplex advantage? |
| A. | Repetitive signals can be summed |
| B. | Repetitive signals can be averaged |
| C. | Increases signal to noise ratio |
| D. | Decreases signal to noise ratio |
| Answer» E. | |
| 13. |
Fourier transform NMR spectrometer has which of the following characteristics? |
| A. | Increased sensitivity, long time to obtain data |
| B. | Decreased sensitivity, long time to obtain data |
| C. | Increased sensitivity, reduced time to obtain data |
| D. | Decreased sensitivity, reduced time to obtain data |
| Answer» D. Decreased sensitivity, reduced time to obtain data | |
| 14. |
Fourier transform NMR spectrometer allows NMR transitions to be observed simultaneously. |
| A. | True |
| B. | False |
| Answer» B. False | |