MCQOPTIONS
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MCQOPTIONS
This section includes 170 Mcqs, each offering curated multiple-choice questions to sharpen your Avionics knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The process used to separate insoluble particles from liquids is |
| A. | drying |
| B. | filtration |
| C. | sieving |
| D. | extraction |
| Answer» C. sieving | |
| 152. |
Where are the headquarters of FBI? |
| A. | New York |
| B. | Philadelphia |
| C. | New Orleans |
| D. | Washington DC |
| Answer» E. | |
| 153. |
Immobilized cell reactors for wastewater treatment have the advantage of having/being |
| A. | more stable and prevent washout |
| B. | higher cell concentration |
| C. | all of the above |
| D. | higher dilution rate before the cells washout |
| Answer» D. higher dilution rate before the cells washout | |
| 154. |
Which of the following(s) is/are considered the limitations of the exponential growth model? |
| A. | It does not consider factors that causes cells growth to stop or slow |
| B. | Only predicts that cells grow exponentially during the log phase |
| C. | All of the above |
| D. | Predicts cell growth at a linear rate |
| Answer» B. Only predicts that cells grow exponentially during the log phase | |
| 155. |
Formation of end product by Lactococcus lactis will become non-growth associated as lactic acid accumulates because |
| A. | cells will redirect NAD to anabolism |
| B. | cells will redirect ATP to anabolism |
| C. | cells will redirect ATP to the active transport of lactic acid and H out of the cells |
| D. | cells will redirect ATP to facilitate the diffusion of lactic acid and H out of the cells |
| Answer» D. cells will redirect ATP to facilitate the diffusion of lactic acid and H out of the cells | |
| 156. |
The filter paper must be folded |
| A. | five times |
| B. | four times |
| C. | thrice |
| D. | twice |
| Answer» E. | |
| 157. |
Law of distribution in solvent extraction works irrespective of amount of |
| A. | solid |
| B. | solution |
| C. | solvent |
| D. | solute |
| Answer» E. | |
| 158. |
A constant temperature at which a pure liquid changes into a gas is called |
| A. | depression in freezing point |
| B. | latent heat of vaporization |
| C. | melting point |
| D. | boiling point |
| Answer» E. | |
| 159. |
The height to diameter ratio (H/D) for the tank fermenters is |
| A. | >3 |
| B. | <3 |
| C. | >1.5 |
| D. | <1.5 |
| Answer» C. >1.5 | |
| 160. |
The type of metallurgy that uses an aqueous solution to extract the metals from their ores is called _________. |
| A. | pyrometallurgy |
| B. | extractive metallurgy |
| C. | hydrometallurgy |
| D. | electrometallurgy |
| Answer» D. electrometallurgy | |
| 161. |
In wastewater treatment, which bioreactor is generally used? |
| A. | Trickle bed reactor |
| B. | Plug flow reactor |
| C. | CSTR |
| D. | Tower fermentor |
| Answer» B. Plug flow reactor | |
| 162. |
The monod model predicts that the specific growth rate |
| A. | will decrease with the concentration of the growth limiting substrate |
| B. | will increase with the concentration of the growth limiting substrate until it reaches a maximum value |
| C. | does not depend on growth limiting substrate |
| D. | will increase with the concentration of the growth limiting substrate |
| Answer» C. does not depend on growth limiting substrate | |
| 163. |
Chromatography is used to separate |
| A. | solution |
| B. | mixtures |
| C. | molecules |
| D. | atoms |
| Answer» C. molecules | |
| 164. |
Filtration is a slow process if carried by |
| A. | tube |
| B. | clay funnel |
| C. | plastic funnel |
| D. | glass funnel |
| Answer» D. glass funnel | |
| 165. |
In the second and third transition series, the maximum oxidation state is __________. |
| A. | 5 |
| B. | 4 |
| C. | 8 |
| D. | 7 |
| Answer» D. 7 | |
| 166. |
Since when FBI is known by its present name? |
| A. | 7/1/1935 12:00:00 AM |
| B. | 7/1/1932 12:00:00 AM |
| C. | 12/22/1968 12:00:00 AM |
| D. | 4/14/1949 12:00:00 AM |
| Answer» B. 7/1/1932 12:00:00 AM | |
| 167. |
To filter HCL solution crucible is covered with |
| A. | tissue |
| B. | paper |
| C. | asbestos |
| D. | wax |
| Answer» D. wax | |
| 168. |
In partition chromatography the stationary phase is |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | none |
| Answer» C. gas | |
| 169. |
To filter the preciitates needed to be ignited we use |
| A. | Gooch crucible |
| B. | sintered glass crucible |
| C. | clay crucible |
| D. | plastic crucible |
| Answer» B. sintered glass crucible | |
| 170. |
Selectively dissolving a metal-containing compound from an ore is called __________. |
| A. | oxidation |
| B. | sol formation |
| C. | leaching |
| D. | refining |
| Answer» D. refining | |