MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 extremely high inertia of the thin membrane in the oxygen sensor allows it to rapidly attain equilibrium. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following bridges are used in magnetic wind instruments? |
| A. | Wheatstone bridge |
| B. | Kelvin’s bridge |
| C. | Anderson’s bridge |
| D. | Schering’s bridge |
| Answer» B. Kelvin’s bridge | |
| 3. |
WHICH_OF_THE_FOLLOWING_BRIDGES_ARE_USED_IN_MAGNETIC_WIND_INSTRUMENTS??$ |
| A. | Wheatstone bridge |
| B. | Kelvin’s bridge |
| C. | Anderson’s bridge |
| D. | Schering’s bridge |
| Answer» B. Kelvin‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge | |
| 4. |
The_extremely_high_inertia_of_the_thin_membrane_in_the_oxygen_sensor_allows_it_to_rapidly_attain_equilibrium.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
How are the hydrocarbons in the samples removed in magnetic wind instruments? |
| A. | By using a cold trap |
| B. | By using a filter |
| C. | By using a semipermeable membrane |
| D. | By using magnetic effect |
| Answer» B. By using a filter | |
| 6. |
Which of the following concepts are not used in magnetic wind instruments? |
| A. | Change in resistance due to cooling by magnetic wind |
| B. | Displacement of membrane by magnetised oxygen |
| C. | Difference in pressure difference between two gases having varying concentration of oxygen |
| D. | By measuring temperature using thermometer |
| Answer» E. | |
| 7. |
Which of the following is used in magnetic wind instruments to determine the amount of oxygen? |
| A. | Change in resistance |
| B. | Change in capacitance |
| C. | Change in inductance |
| D. | Change in concentration |
| Answer» B. Change in capacitance | |
| 8. |
In OXYMAT-M oxygen analyser which of the following is usually used as reference gas? |
| A. | Hydrogen |
| B. | Nitrogen |
| C. | Helium |
| D. | Ambient air |
| Answer» E. | |
| 9. |
Magnetic wind analyzers are also known as which of the following? |
| A. | Thermo-magnetic analyzers |
| B. | Electro-magnetic analyzers |
| C. | Thermo-analytical analyzers |
| D. | Hot wire analyzers |
| Answer» B. Electro-magnetic analyzers | |
| 10. |
Hydrocarbons need to be removed from the sample gas to avoid errors in Hartman and Braun oxygen analyzer. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which of the following is not a cause of the error that could occur in Hartman and Braun oxygen analyzer based on the magnetic wind? |
| A. | The filament temperature could be affected by changes in thermal conductivity of the carrier gas |
| B. | Hydrocarbons in sample stream may react on the heated filaments |
| C. | Gravitation chimney flow effect lead to errors when cross tube is horizontal |
| D. | Combustible gases may react on the heated filaments |
| Answer» D. Combustible gases may react on the heated filaments | |
| 12. |
Which of the following does not occur in Hartman and Braun oxygen analyzer based on the magnetic wind? |
| A. | Oxygen is attracted to the magnetic field |
| B. | Oxygen becomes less paramagnetic due to rise in temperature |
| C. | Resistance change in a resistance connected to the Wheatstone bridge occur |
| D. | Wheatstone Bridge becomes balanced due to temperature change |
| Answer» E. | |