MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
If the oxygen content is greater than 21%, which of the following gases must be used to set the span point? |
| A. | Oxygen |
| B. | Dry air |
| C. | Nitrogen |
| D. | Hydrogen |
| Answer» B. Dry air | |
| 2. |
If the oxygen content is not greater than 21%, which of the following gases must be used to set the span point? |
| A. | Oxygen |
| B. | Dry air |
| C. | Nitrogen |
| D. | Hydrogen |
| Answer» C. Nitrogen | |
| 3. |
Which of the following happens to the magnetic susceptibility of gases when the temperature changes? |
| A. | It increases with increase in temperature |
| B. | It decreases with increase in temperature |
| C. | It remains constant with increase in temperature |
| D. | It remains constant with decrease in temperature |
| Answer» C. It remains constant with increase in temperature | |
| 4. |
In the Beckman instrument, the flow rate recommended when the sample enters directly for rapid response is which of the following? |
| A. | 100-200 cc/min |
| B. | 50-250 cc/min |
| C. | 40-60 cc/min |
| D. | 200-300 cc/min |
| Answer» D. 200-300 cc/min | |
| 5. |
In the Beckman instrument, the flow rate recommended when the sample enters through a porous diffusion disc is which of the following? |
| A. | 100-200 cc/min |
| B. | 50-250 cc/min |
| C. | 40-60 cc/min |
| D. | 200-300 cc/min |
| Answer» C. 40-60 cc/min | |
| 6. |
To improve paramagnetic oxygen analyzer, the quartz suspension must be replaced with which of the following? |
| A. | Platinum-iridium |
| B. | Phosphor-bronze |
| C. | Gold-palladium |
| D. | Antimony |
| Answer» B. Phosphor-bronze | |
| 7. |
In Paramagnetic oxygen analyzer, when no oxygen is present the magnetic force balances torque of the fibre. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following is true about the two charged vanes that produce electric field in Paramagnetic oxygen analyzer? |
| A. | Both the vanes should be at higher potential than the test body |
| B. | Both the vanes should have the same potential as the test body |
| C. | One vane should be at higher potential than the test body and the other vane should be at lower potential |
| D. | Both the vanes should be at lower potential than the test body |
| Answer» D. Both the vanes should be at lower potential than the test body | |
| 9. |
In Paramagnetic oxygen analyzer, the electrostatic force that is exerted should have which of the following features? |
| A. | It should be greater than the magnetic field and must be in the same direction |
| B. | It should be equal to the magnetic field and must be in the same direction |
| C. | It should be greater than the magnetic field and must be in the opposite direction |
| D. | It should be equal to the magnetic field and must be in the opposite direction |
| Answer» E. | |
| 10. |
In Paramagnetic oxygen analyzer, the expression for magnitude of force produced can be expressed as, F = C (K-KO), where K= magnetic susceptibility of surrounding gas and KO= magnetic susceptibility of sphere. C denotes which of the following? |
| A. | Magnetic field strength |
| B. | Magnetic gradient |
| C. | Function of magnetic field strength and gradient |
| D. | Magnetic flux |
| Answer» D. Magnetic flux | |
| 11. |
The force produced during the operation of Paramagnetic oxygen analyzer is proportional to which of the following? |
| A. | Magnetic susceptibility of sphere |
| B. | Magnetic susceptibility of surrounding gas |
| C. | Difference between magnetic susceptibility of sphere and magnetic field strength |
| D. | Difference between magnetic susceptibility of sphere and that of surrounding gas |
| Answer» E. | |
| 12. |
Which of the following gases have paramagnetic property (ability to get attracted to a magnetic field)? |
| A. | Nitric oxide |
| B. | Hydrogen |
| C. | Helium |
| D. | Nitrogen |
| Answer» B. Hydrogen | |
| 13. |
Which among the following gases have diamagnetic property (ability to be repelled by magnetic fields)? |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Nitrogen dioxide |
| D. | Nitric oxide |
| Answer» C. Nitrogen dioxide | |