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. |
Photomultipliers used in Liquid scintillation detectors are a source of instability. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
A quench curve can be constructed by plotting the counting efficiency versus ____________ |
| A. | Q-number |
| B. | Quench factor |
| C. | H-number |
| D. | Disintegrations |
| Answer» D. Disintegrations | |
| 3. |
PHOTOMULTIPLIERS_USED_IN_LIQUID_SCINTILLATION_DETECTORS_ARE_A_SOURCE_OF_INSTABILITY.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
A quench curve can be constructed by plotting the counting efficiency versus ___________? |
| A. | Q-number |
| B. | Quench factor |
| C. | H-number |
| D. | Disintegrations |
| Answer» D. Disintegrations | |
| 5. |
Due to the presence of red, green and yellow colour in the vial, which of the following occurs? |
| A. | Chemical quench |
| B. | Interference quench |
| C. | Colour quenching |
| D. | Self-absorption |
| Answer» D. Self-absorption | |
| 6. |
Variation of gain with temperature does not cause instability. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
In which type of quenching, the radiation emitted by the isotope is not detected due to absorption of the radiation by the sample itself? |
| A. | Chemical quench |
| B. | Interference quench |
| C. | Colour quenching |
| D. | Self-absorption |
| Answer» E. | |
| 8. |
Which of the following is not a type of quenching? |
| A. | Chemical quench |
| B. | Interference quench |
| C. | Colour quenching |
| D. | Self-absorption |
| Answer» C. Colour quenching | |
| 9. |
The reduction in counting efficiency of the scintillation detector is called as __________ |
| A. | Disintegration |
| B. | Decay |
| C. | Quenching |
| D. | Reduction |
| Answer» D. Reduction | |
| 10. |
In liquid scintillation counter, which of the following is used to convert light into electrical signals? |
| A. | Photo multiplier tube |
| B. | Photo emissive tube |
| C. | Photo voltaic cell |
| D. | Photo reflector |
| Answer» B. Photo emissive tube | |
| 11. |
When UV light is absorbed by the fluor molecules the light emitted is in which of the following colours? |
| A. | Pink |
| B. | Red |
| C. | Green |
| D. | Blue |
| Answer» E. | |
| 12. |
In liquid scintillation counter, which of the following is a fluorescent substance? |
| A. | Solvent |
| B. | Solute |
| C. | Crystal |
| D. | Reagent |
| Answer» C. Crystal | |