MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 20 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. |
When klystron frequency is close to the cavity resonant frequency, much less power is reflected from the cavity to the diode. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The cavity resonant frequency should be equal to which of the following? |
| A. | Frequency of electric field |
| B. | Klystron frequency |
| C. | Frequency of magnetic field |
| D. | Mechanical frequency |
| Answer» C. Frequency of magnetic field | |
| 3. |
In basic ESR spectrometer, the cavity length is adjustable. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
By introducing which of the following, signal-to-noise ratio can be improved? |
| A. | Small amplitude field modulation |
| B. | Large amplitude field modulation |
| C. | Small amplitude field attenuation |
| D. | Large amplitude field attenuation |
| Answer» B. Large amplitude field modulation | |
| 5. |
Which of the following routes are the microwaves entering from the klystron towards the cavity? |
| A. | Oscillator |
| B. | Attenuator |
| C. | Circulator |
| D. | Reflector |
| Answer» D. Reflector | |
| 6. |
Given below is the diagram of Klystron tube. Identify the component. |
| A. | Cathode |
| B. | Anode |
| C. | Grid |
| D. | Reflector electrode |
| Answer» E. | |
| 7. |
IN_BASIC_ESR_SPECTROMETER,_THE_CAVITY_LENGTH_IS_ADJUSTABLE.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
When klystron frequency is close to the cavity resonant frequency, much less power is reflected from the cavity to the diode.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
The cavity resonant frequency should be equal to which of the following?$ |
| A. | Frequency of electric field |
| B. | Klystron frequency |
| C. | Frequency of magnetic field |
| D. | Mechanical frequency |
| Answer» C. Frequency of magnetic field | |
| 10. |
The output of the klystron does not pass through which of the following? |
| A. | Isolator |
| B. | Reflector |
| C. | Power leveller |
| D. | Directional coupler |
| Answer» C. Power leveller | |
| 11. |
At which of the following frequencies is the magnetic field at the sample modulated? |
| A. | 1 kHz |
| B. | 10 kHz |
| C. | 100 kHz |
| D. | 1000 kHz |
| Answer» D. 1000 kHz | |
| 12. |
Which of the following is the operating frequency of the ESR spectrometer? |
| A. | 1.7 to 3.4 GHz |
| B. | 1.5 to 4.2 GHz |
| C. | 3.2 to 5.4 GHz |
| D. | 8.8 to 9.6 GHz |
| Answer» E. | |
| 13. |
From which of the following are electrons emitted in the klystron tube? |
| A. | Cathode |
| B. | Anode |
| C. | Grid |
| D. | Reflector electrode |
| Answer» B. Anode | |
| 14. |
Which of the following is adjusted as a fine control for frequency tuning? |
| A. | Cathode |
| B. | Anode |
| C. | Reflector voltage |
| D. | Grid |
| Answer» D. Grid | |
| 15. |
By introducing which of the following, signal-to- noise ratio can be improved? |
| A. | Small amplitude field modulation |
| B. | Large amplitude field modulation |
| C. | Small amplitude field attenuation |
| D. | Large amplitude field attenuation |
| Answer» B. Large amplitude field modulation | |
| 16. |
Which of the following routes the microwaves entering from the klystron towards the cavity? |
| A. | Oscillator |
| B. | Attenuator |
| C. | Circulator |
| D. | Reflector |
| Answer» D. Reflector | |
| 17. |
Microwaves reflected back from the cavity are routed to which of the following? |
| A. | Attenuator |
| B. | Klystron |
| C. | Load |
| D. | Diode detector |
| Answer» E. | |
| 18. |
Which of the following is also known as reflex oscillator? |
| A. | Triode |
| B. | Pentode |
| C. | Special tube |
| D. | Klystron tube |
| Answer» E. | |
| 19. |
Microwaves are generated by __________ and the power level is adjusted with the ________ |
| A. | Triode, rectifier |
| B. | Pentode, attenuator |
| C. | Klystron tube, attenuator |
| D. | Diode, rectifier |
| Answer» D. Diode, rectifier | |
| 20. |
Microwave frequency can be tuned over a small range by adjusting the distance between which of the following? |
| A. | Cathode and anode |
| B. | Anode and the reflector |
| C. | Cathode and the reflector |
| D. | Cathode and grid |
| Answer» D. Cathode and grid | |