MCQOPTIONS
Saved Bookmarks
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. |
The voltage generated by the receiver coil is small and it must be amplified. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Given below is the diagram of Cw NMR spectrometer. Identify the unmarked component. |
| A. | Recorder |
| B. | RF channel |
| C. | Receiver |
| D. | Sweep generator |
| Answer» E. | |
| 3. |
Nuclear induction probes’ one coil is used for signal detection. What is the function of the other coil? |
| A. | Sample irradiation |
| B. | Magnet |
| C. | Detector |
| D. | Sweep generator |
| Answer» B. Magnet | |
| 4. |
The single coil probe supplies the RF radiation to the sample and also serves as a part of which of the following circuits? |
| A. | RF channels |
| B. | Magnet |
| C. | Detector |
| D. | Sweep generator |
| Answer» D. Sweep generator | |
| 5. |
In field sweep method, which of the following parameters are varied continuously? |
| A. | Magnetic field |
| B. | RF signal |
| C. | Sample concentration |
| D. | Amplification factor |
| Answer» B. RF signal | |
| 6. |
THE_SINGLE_COIL_PROBE_SUPPLIES_THE_RF_RADIATION_TO_THE_SAMPLE_AND_ALSO_SERVES_AS_A_PART_OF_WHICH_OF_THE_FOLLOWING_CIRCUITS??$ |
| A. | RF channels |
| B. | Magnet |
| C. | Detector |
| D. | Sweep generator |
| Answer» D. Sweep generator | |
| 7. |
Nuclear_induction_probes’_one_coil_is_used_for_signal_detection._What_is_the_function_of_the_other_coil?$# |
| A. | Sample irradiation |
| B. | Magnet |
| C. | Detector |
| D. | Sweep generator |
| Answer» B. Magnet | |
| 8. |
How is the inhomogeneity of magnetic fields compensated? |
| A. | With large magnetic fields |
| B. | With small magnetic fields |
| C. | By using two or more magnets |
| D. | By providing required insulation |
| Answer» C. By using two or more magnets | |
| 9. |
Which of the following can be used instead of magnets to produce the magnetic field? |
| A. | Inductor |
| B. | Motor |
| C. | Generator |
| D. | Superconducting solenoids |
| Answer» E. | |
| 10. |
The amplification required for continuous-wave NMR is of the order of which of the following? |
| A. | 10<sup>1</sup> |
| B. | 10<sup>2</sup> |
| C. | 10<sup>3</sup> |
| D. | 10<sup>5</sup> |
| Answer» E. | |
| 11. |
The_voltage_generated_by_the_receiver_coil_is_small_and_it_must_be_amplified. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
The sample is contained in which of the following components? |
| A. | Flask |
| B. | Capillary tube |
| C. | Curvette |
| D. | Bore glass tube |
| Answer» E. | |
| 13. |
Which of the following must not be done to maintain the magnetic field over the sample uniform in space and time? |
| A. | Large pole pieces need to be used |
| B. | Pole faces must be polished |
| C. | Wide pole gap must be present |
| D. | Magnets can be permanent or electromagnet |
| Answer» D. Magnets can be permanent or electromagnet | |
| 14. |
For high resolution work the magnetic field over the entire sample volume must be maintained uniform in space and time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
Which of the following is not true of electromagnets? |
| A. | They are expensive |
| B. | They require power supply |
| C. | They don’t require cooling system |
| D. | They don’t require extensive shielding |
| Answer» D. They don‚Äö√Ñ√∂‚àö√ë‚àö¬•t require extensive shielding | |
| 16. |
Which of the following statements are not true about permanent magnets? |
| A. | They are simple |
| B. | They are inexpensive |
| C. | They don’t require shielding |
| D. | They don’t require power supply |
| Answer» D. They don‚Äö√Ñ√∂‚àö√ë‚àö¬•t require power supply | |
| 17. |
In frequency sweep method, which of the following parameters are varied continuously? |
| A. | Magnetic field |
| B. | RF signal |
| C. | Sample concentration |
| D. | Amplification factor |
| Answer» C. Sample concentration | |
| 18. |
Which of the following components are used to separate the nuclear spin energy states? |
| A. | RF channels |
| B. | Magnet |
| C. | Sample probe |
| D. | Sweep generator |
| Answer» C. Sample probe | |