MCQOPTIONS
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MCQOPTIONS
This section includes 113 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When individual up converters are used to modulate a channel, what is used to combine them into final signal? |
| A. | Microwave combiner |
| B. | Multiplexer |
| C. | Mixer |
| D. | Amplifier |
| Answer» B. Multiplexer | |
| 2. |
If the earth station downlink signal received is at fs = 4.08 GHz, what first stage local-oscillator frequency fLO is needed to achieve IF of 770 MHz? |
| A. | 3310 MHz |
| B. | 4080 MHz |
| C. | 1203 MHz |
| D. | 3250 MHz |
| Answer» B. 4080 MHz | |
| 3. |
Where did Guglielmo Marconi die? |
| A. | Stolkholm |
| B. | Helsinki |
| C. | Rome |
| D. | Oslo |
| Answer» D. Oslo | |
| 4. |
Which of the following procedures uses a photocell to measure absorbance of a culture to regulate the flow of culture media? |
| A. | Hemostat |
| B. | Coulter Counter |
| C. | Trubidostat |
| D. | Petroff-Hausser chamber |
| Answer» D. Petroff-Hausser chamber | |
| 5. |
First non-crease fabrics were made by help of |
| A. | nylon |
| B. | Terylene |
| C. | all of them |
| D. | caprolactum |
| Answer» C. all of them | |
| 6. |
Many of pigments found in living things can be used as |
| A. | reactants |
| B. | indicators |
| C. | all of them |
| D. | catalyst |
| Answer» C. all of them | |
| 7. |
Gases do not have any fixed |
| A. | volume |
| B. | shape |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 8. |
In 1888 Presidential Election Grover Cleveland had 5,540,329 popular votes as against Benjamin Harrison’s 5,439,853. Benjamin Harrison got 233 electoral votes. How many electoral votes did Grover Cleveland get? |
| A. | 240 |
| B. | 234 |
| C. | 168 |
| D. | 212 |
| Answer» D. 212 | |
| 9. |
Growth of bacteria and fungi is sometimes inhibited by |
| A. | ammonium nitrate |
| B. | sulfur dioxide |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 10. |
Zinc forms only one ion by completing its |
| A. | 2d sub shell |
| B. | 3d sub shell |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 11. |
Which of the following is the suitable temperature range for mesophiles? |
| A. | 25-40°C |
| B. | 20-30°C |
| C. | None of these |
| D. | >40°C |
| Answer» B. 20-30°C | |
| 12. |
In ethane C2H4, the π-bond is formed between |
| A. | C-H atoms |
| B. | C-C atoms |
| C. | no π-bond is formed. |
| D. | H-H atoms |
| Answer» E. | |
| 13. |
Magnesium burns in oxygen to form |
| A. | magnesium hydroxide |
| B. | magnesium peroxide |
| C. | none |
| D. | magnesium oxide |
| Answer» E. | |
| 14. |
Who made Guglielmo Marconi Commander of the Order of St. Maurice and St. Lazarus? |
| A. | Kaiser of Germany |
| B. | Czar of Russia |
| C. | King of Italy |
| D. | President of France |
| Answer» D. President of France | |
| 15. |
The combination of low levels of NaCl, NaNO3 (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of |
| A. | S. aureus |
| B. | Salmonella |
| C. | all of these |
| D. | botulinum |
| Answer» D. botulinum | |
| 16. |
When was Guglielmo Marconi born? |
| A. | 25 April 1874 |
| B. | 12 January 1862 |
| C. | 22 November 1872 |
| D. | 18 September 1868 |
| Answer» B. 12 January 1862 | |
| 17. |
Percentage of Fe+2 can be determined by |
| A. | ferrous ion |
| B. | mangnate ion |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 18. |
When was Grover Cleveland first sworn in as President of USA? |
| A. | 4 March 1885 |
| B. | 20 September 1885 |
| C. | 4 November 1886 |
| D. | 20 January 1885 |
| Answer» B. 20 September 1885 | |
| 19. |
Oxidation number can be |
| A. | negative |
| B. | positive |
| C. | All of Above |
| D. | zero |
| Answer» D. zero | |
| 20. |
On heating PbO lead(II) oxide it will produce |
| A. | Pb3O4 |
| B. | red lead oxide |
| C. | all of them |
| D. | triplumbic tetroxide |
| Answer» D. triplumbic tetroxide | |
| 21. |
The organism which grows best above 45°C are called |
| A. | mesosphilic |
| B. | psychrophilic |
| C. | any of these |
| D. | thermophilic |
| Answer» E. | |
| 22. |
Sulphuric (VI) acid is formed upon the reaction of H2O and |
| A. | SO2 |
| B. | SO |
| C. | SO3 |
| D. | S2O2 |
| Answer» B. SO | |
| 23. |
Ethylamine is a stronger base as it is by nature electron |
| A. | donator |
| B. | acceptor |
| C. | none |
| D. | both a and b |
| Answer» B. acceptor | |
| 24. |
A spore differs from an actively replicating bacterium in that the spore |
| A. | is able to withstand more extreme conditions than the replicating cell |
| B. | is produced during a process involving asymmetric division |
| C. | all of the above |
| D. | is metabolically inactive |
| Answer» D. is metabolically inactive | |
| 25. |
A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the |
| A. | organism can tolerate oxygen |
| B. | broth is sterile |
| C. | organism should be grown in an anaerobic chamber |
| D. | organism cannot produce superoxide dismutase and/or catalase |
| Answer» E. | |
| 26. |
E⦵ is spoken as |
| A. | standard potential |
| B. | E standard |
| C. | all of them |
| D. | E potential |
| Answer» C. all of them | |
| 27. |
The ionic equation O2- (aq)+ H2O(l) → 2OH-. This will result in an |
| A. | alkaline solution |
| B. | acidic solution |
| C. | None of Above |
| D. | Acidic and Alkaline solution |
| Answer» B. acidic solution | |
| 28. |
Implicit factors |
| A. | can be synergistic |
| B. | depend on developing microflora |
| C. | none of the above |
| D. | both ( and ( |
| Answer» E. | |
| 29. |
The major part of an atom is |
| A. | space |
| B. | electric field |
| C. | none |
| D. | both a and b |
| Answer» B. electric field | |
| 30. |
In car engine the fuel is in compressed form and ignited by |
| A. | spark |
| B. | key |
| C. | brake |
| D. | accelerator |
| Answer» B. key | |
| 31. |
How many murderers did Grover Cleveland personally hang when he was the public executioner? |
| A. | Thee |
| B. | Two |
| C. | Ten |
| D. | Five |
| Answer» C. Ten | |
| 32. |
The generation time of a culture that produces two generations per hour is |
| A. | lesser than that produces three generations per hour |
| B. | greater than that produces three generations per hour |
| C. | none of the above |
| D. | equal to that produces three generations per hour |
| Answer» C. none of the above | |
| 33. |
Microaerophilic bacteria are those which require |
| A. | low levels of oxygen for growth (lesser than O2 present in atmosphere) |
| B. | 21 % oxygen for growth |
| C. | none of the above |
| D. | oxygen for activation of enzymes |
| Answer» B. 21 % oxygen for growth | |
| 34. |
Chemical reactivity can be determined through |
| A. | bond energy |
| B. | polarity of a bond |
| C. | None of Above |
| D. | both of these |
| Answer» B. polarity of a bond | |
| 35. |
The bond breakage in CFC molecules releases highly reactive |
| A. | chlorine free radicals |
| B. | chlorine radicals |
| C. | free ions |
| D. | free electrons |
| Answer» B. chlorine radicals | |
| 36. |
In which field did Guglielmo Marconi get Nobel Prize in 1909? |
| A. | Medicine |
| B. | Chemistry |
| C. | Literature |
| D. | Physics |
| Answer» E. | |
| 37. |
Which of the following organisms typically get their carbon for biosynthesis from organic compounds? |
| A. | Ammonia-oxidizing bacteria (chemolithotrophic bacteri |
| B. | Aerobic, glucose-respiring bacteria (aerobic respiration) |
| C. | None of the above |
| D. | Photosynthetic cyanobacteria (phototrophic metabolism) |
| Answer» C. None of the above | |
| 38. |
At temperatures above 1500 °C hydrogen fluoride and hydrogen chloride are |
| A. | not decomposed |
| B. | decomposed |
| C. | melt |
| D. | stable |
| Answer» B. decomposed | |
| 39. |
The equation used to obtain bacterial population by binary fission is |
| A. | log N/No = (0.3010) n |
| B. | N = No2n |
| C. | All of these |
| D. | log(N/No) = nlog 2 |
| Answer» D. log(N/No) = nlog 2 | |
| 40. |
When was Grover Cleveland born? |
| A. | 4 May 1830 |
| B. | 18 March 1837 |
| C. | 2 October 1848 |
| D. | 12 August 1834 |
| Answer» C. 2 October 1848 | |
| 41. |
Upon reaction of O2 with metals of Period 3 elements, ionic bonds are formed if |
| A. | if the electronegativity of Period 3 elements is above 3.5 |
| B. | if the electronegativity of Period 3 elements is more then 0.5 |
| C. | the higher the difference in electronegativity of O2 and Period 3 elements. |
| D. | if the electronegativity of Period 3 elements is lower than 1.7 |
| Answer» D. if the electronegativity of Period 3 elements is lower than 1.7 | |
| 42. |
As the metallic radii increase in Group II, the density/gcm-3 |
| A. | decreases |
| B. | increases |
| C. | depends upon the elements it reacts with |
| D. | remains the same |
| Answer» C. depends upon the elements it reacts with | |
| 43. |
The main catalyst which was used in Haber's process was |
| A. | silver |
| B. | copper |
| C. | carbon |
| D. | iron |
| Answer» E. | |
| 44. |
The total biomass of an organism will be determined by the nutrient present in the lowest concentration relative to the organism\'s requirements is a statement of |
| A. | Shelford's law of tolerance |
| B. | Liebig's law of the minimum |
| C. | Heisenberg's principle of uncertainty |
| D. | quorum sensing |
| Answer» C. Heisenberg's principle of uncertainty | |
| 45. |
When did Guglielmo Marconi die? |
| A. | 2/3/1929 12:00:00 AM |
| B. | 5/5/1945 12:00:00 AM |
| C. | 12/14/1938 12:00:00 AM |
| D. | 7/20/1937 12:00:00 AM |
| Answer» E. | |
| 46. |
Which of these metals (s) react vigorously with chlorine? |
| A. | P(s) |
| B. | Si(s) |
| C. | Mg(s) |
| D. | Ar |
| Answer» D. Ar | |
| 47. |
Increase in radius of metal ion will decrease its |
| A. | polarity |
| B. | solubility |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 48. |
A microbe, which grows at temperatures above 95° C is most likely to be |
| A. | a fungus |
| B. | an archaean |
| C. | none of these |
| D. | a protozoan |
| Answer» C. none of these | |
| 49. |
Which of the following organisms typically get their carbon for biosynthesis from carbon dioxide? |
| A. | Anaerobic, glucose-respiring bacteria (anaerobic respiration) |
| B. | Glucose-fermenting bacteria (fermentation) |
| C. | Ammonia-oxidizing bacteria (chemolithotrophic bacteri |
| D. | Aerobic, glucose-respiring bacteria (aerobic respiration) |
| Answer» D. Aerobic, glucose-respiring bacteria (aerobic respiration) | |
| 50. |
Organisms, using organic compounds as electron donors are called |
| A. | phototrophs |
| B. | lithotrophs |
| C. | organotrophs |
| D. | chemotrophs |
| Answer» D. chemotrophs | |