MCQOPTIONS
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MCQOPTIONS
This section includes 16 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 resolving power of Bennet type spectrometer is primarily based on which of the following? |
| A. | Distance between detector and reflectron |
| B. | Difference between the individual rf accelerating stages |
| C. | Length of the drift tube |
| D. | Laser beam used |
| Answer» C. Length of the drift tube | |
| 2. |
Which of the following is not the feature of Bennet type spectrometer? |
| A. | Lightweight |
| B. | Simple |
| C. | Absence of spurious lines |
| D. | Moderate resolution |
| Answer» D. Moderate resolution | |
| 3. |
Which of the following is the disadvantage of using three stage tubes? |
| A. | Reduced resolution |
| B. | Bulky construction |
| C. | Complex |
| D. | Heavy |
| Answer» B. Bulky construction | |
| 4. |
The spurious lines can be reduced to a minimum by using which of the following? |
| A. | Single stage tube |
| B. | Two stage tube |
| C. | Three stage tube |
| D. | Reflectron |
| Answer» D. Reflectron | |
| 5. |
Which of the following is placed just before the detector in a radiofrequency mass spectrometer? |
| A. | Ion source |
| B. | Potential energy selector |
| C. | Ionisation chamber |
| D. | Reflectron |
| Answer» C. Ionisation chamber | |
| 6. |
WHICH_OF_THE_FOLLOWING_IS_THE_DISADVANTAGE_OF_USING_THREE_STAGE_TUBES??$ |
| A. | Reduced resolution |
| B. | Bulky construction |
| C. | Complex |
| D. | Heavy |
| Answer» B. Bulky construction | |
| 7. |
The resolving power of Bennet type spectrometer is primarily based on which of the following?$ |
| A. | Distance between detector and reflectron |
| B. | Difference between the individual rf accelerating stages |
| C. | Length of the drift tube |
| D. | Laser beam used |
| Answer» C. Length of the drift tube | |
| 8. |
Which_of_the_following_is_not_the_feature_of_Bennet_type_spectrometer?$ |
| A. | Lightweight |
| B. | Simple |
| C. | Absence of spurious lines |
| D. | Moderate resolution |
| Answer» D. Moderate resolution | |
| 9. |
The spurious lines can be reduced to minimum by using which of the following? |
| A. | Single stage tube |
| B. | Two stage tube |
| C. | Three stage tube |
| D. | Reflectron |
| Answer» D. Reflectron | |
| 10. |
In Bennet spectrometer, the rf voltage has a fixed frequency. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
The resolution of the Bennet tube can be improved by using which of the following? |
| A. | Sine wave rf signal |
| B. | Square wave rf signal |
| C. | Triangular wave rf signal |
| D. | Random signal |
| Answer» C. Triangular wave rf signal | |
| 12. |
The DC ion accelerating voltage is swept from _________ |
| A. | 0 to 50 V |
| B. | 50 to 100 V |
| C. | 200 to 300 V |
| D. | 50 to 250 V |
| Answer» E. | |
| 13. |
The rf spectrometer contains a magnet. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
The alternating voltage rf voltage is applied to which of the following? |
| A. | All grids |
| B. | Central grid |
| C. | Alternate grids |
| D. | None of the grids |
| Answer» C. Alternate grids | |
| 15. |
Which of the following is applied in one or more stages where each stage is a series of three equally spaced parallel grids? |
| A. | Ionisation field |
| B. | Reflection |
| C. | RF field |
| D. | Acceleration |
| Answer» D. Acceleration | |
| 16. |
Which of the following is placed just before the detector in radiofrequency mass |
| A. | |
| B. | Ion source |
| C. | Potential energy selector |
| Answer» C. Potential energy selector | |