MCQOPTIONS
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MCQOPTIONS
This section includes 17 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. |
Luft detector cell which uses gas as detection mechanism is not vibration sensitive. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following is not the characteristics of Indium arsenide photovoltaic detector used in infrared analyzers for hydrocarbons? |
| A. | It operates at ambient temperature |
| B. | Has maximum detectivity at 3.4µm |
| C. | Sensitivity increases at longer wavelength |
| D. | It has no response to radiation of wavelength greater than 4µm |
| Answer» D. It has no response to radiation of wavelength greater than 4µm | |
| 3. |
In calibration of CO2 analyser, in order to establish zero calibration which of the following is used as sample? |
| A. | Oxygen |
| B. | Hydrogen |
| C. | Inert gases |
| D. | Nitrogen |
| Answer» D. Nitrogen | |
| 4. |
Which of the following is used as detector in improved infrared analyzer used for gas analysis? |
| A. | PbSe |
| B. | MgCl2 |
| C. | ZnCl |
| D. | CuCl2 |
| Answer» B. MgCl2 | |
| 5. |
Which of the following is the chopping frequency used for medical applications in simple infrared analyser for gas analysis? |
| A. | 2-10 Hz |
| B. | 2-50 Hz |
| C. | 2-100 Hz |
| D. | 2-150 Hz |
| Answer» C. 2-100 Hz | |
| 6. |
IN_CALIBRATION_OF_CO2_ANALYSER,_IN_ORDER_TO_ESTABLISH_ZERO_CALIBRATION_WHICH_OF_THE_FOLLOWING_IS_USED_AS_SAMPLE??$ |
| A. | Oxygen |
| B. | Hydrogen |
| C. | Inert gases |
| D. | Nitrogen |
| Answer» D. Nitrogen | |
| 7. |
WHICH_OF_THE_FOLLOWING_IS_USED_AS_DETECTOR_IN_IMPROVED_INFRARED_ANALYZER_USED_FOR_GAS_ANALYSIS??$ |
| A. | PbSe |
| B. | MgCl<sub>2</sub> |
| C. | ZnCl |
| D. | CuCl<sub>2</sub> |
| Answer» B. MgCl<sub>2</sub> | |
| 8. |
Luft detector cell which uses gas as detection mechanism is not vibration sensitive.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Which of the following is not the characteristics of Indium arsenide photovoltaic detector used in infrared analyzers for hydrocarbons?$ |
| A. | It operates at ambient temperature |
| B. | Has maximum detectivity at 3.4µm |
| C. | Sensitivity increases at longer wavelength |
| D. | It has no response to radiation of wavelength greater than 4µm |
| Answer» D. It has no response to radiation of wavelength greater than 4¬¨¬®¬¨¬µm | |
| 10. |
Which kind of filter is used in improved version of infrared gas analyzer at the output end? |
| A. | Low pass filter |
| B. | High pass filter |
| C. | Narrow bandpass filter |
| D. | Wide bandpass filter |
| Answer» D. Wide bandpass filter | |
| 11. |
Which of the following is not the drawback of conventional infrared analyzers used for gas analysis? |
| A. | Cell is difficult to maintain |
| B. | It is expensive to replace |
| C. | Detector is vibration sensitive |
| D. | Only one source is used |
| Answer» E. | |
| 12. |
The movement of diaphragm in simple infrared analyser for gas analysis results in which of the following? |
| A. | Variable resistance |
| B. | Variable inductance |
| C. | Variable capacitance |
| D. | Variable conductance |
| Answer» D. Variable conductance | |
| 13. |
Vibration excitation occurs only if the sample has hetero-atomic molecules. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Which of the following is used as a source in the simple infrared analyzer for gas analysis? |
| A. | Tungsten filament lamp |
| B. | Nernst glower |
| C. | Hot-wire spiral |
| D. | Mercury arc lamp |
| Answer» D. Mercury arc lamp | |
| 15. |
Which of the following is the chopping frequency used for industrial analyzers in the simple infrared analyser for gas analysis? |
| A. | 2-10 Hz |
| B. | 2-50 Hz |
| C. | 2-100 Hz |
| D. | 2-150 Hz |
| Answer» B. 2-50 Hz | |
| 16. |
Why is the use of infrared analyzers limited when it comes to the analysis of inorganic compounds? |
| A. | Slow response occurs |
| B. | Less accurate results occur |
| C. | Strong absorption of IR radiation by water |
| D. | Small range |
| Answer» D. Small range | |
| 17. |
Which of the following is not a detector used in mid Infrared Spectrophotometer? |
| A. | Thermopile |
| B. | Thermistor |
| C. | Pyroelectric cell |
| D. | Golay cell |
| Answer» E. | |