MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The chloroplast is an autonomous organelle. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The SER consists of ribosomes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Which of the following is responsible for the synthesis of proteins? |
| A. | Lysosomes |
| B. | Ribosomes |
| C. | Nucleolus |
| D. | Golgi body |
| Answer» C. Nucleolus | |
| 4. |
The membrane of vacuole is known as ____________ |
| A. | Tonoplast |
| B. | Plasma membrane |
| C. | Cell wall |
| D. | Cytoplasm |
| Answer» B. Plasma membrane | |
| 5. |
Which of the following is not correct for mitochondria? |
| A. | It is a double-membrane organelle |
| B. | It synthesizes its own DNA |
| C. | It synthesizes proteins |
| D. | The powerhouse of the cell |
| Answer» D. The powerhouse of the cell | |
| 6. |
Who defined periplasmic enzymes? |
| A. | Arnold |
| B. | Wainer |
| C. | Scherrer |
| D. | Lloyd |
| Answer» B. Wainer | |
| 7. |
Which of the following describes the space between the plasma membrane and cell wall? |
| A. | Plasma membrane |
| B. | Cytoplasm |
| C. | Golgi |
| D. | Periplasm |
| Answer» E. | |
| 8. |
The plasma membrane is composed of _______________ |
| A. | Carbohydrate bilayer |
| B. | Protein bilayer |
| C. | Lipid bilayer |
| D. | Vitamins |
| Answer» C. Lipid bilayer | |
| 9. |
Which of the following forms the barrier between the cytoplasm and the external environment? |
| A. | Vacuoles |
| B. | Plasma membrane |
| C. | Lysozyme |
| D. | Golgi |
| Answer» C. Lysozyme | |
| 10. |
Spent yeast is used as ______________ |
| A. | Nutritional supplement |
| B. | Dietary supplement |
| C. | Water supplement |
| D. | Air supplement |
| Answer» B. Dietary supplement | |
| 11. |
Which of the following macromolecule is present in the lowest amount in bakers’ yeast? |
| A. | Lipids |
| B. | Minerals |
| C. | Moisture |
| D. | RNA |
| Answer» D. RNA | |
| 12. |
Which of the following component is present in the highest percentage of the dry weight of dried wine yeast? |
| A. | Iron |
| B. | Sulphur |
| C. | Carbon |
| D. | Oxygen |
| Answer» D. Oxygen | |
| 13. |
The effect of ploidy on yeast cells was demonstrated by _______________ |
| A. | Woldringh |
| B. | Unger |
| C. | Baldwin |
| D. | Vagvolgyi |
| Answer» E. | |
| 14. |
Who described the cell morphology of S. cerevisiae? |
| A. | Woldringh |
| B. | Lodder |
| C. | Unger |
| D. | Baldwin |
| Answer» C. Unger | |
| 15. |
How many fundamental approaches are there to control air pollution? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 16. |
What is the main reason for skin cancer? |
| A. | Due to mutation |
| B. | Due to unhealthy lifestyle |
| C. | Due to alcohol consumption |
| D. | Due to UV radiations |
| Answer» E. | |
| 17. |
When did India signed the Montreal Protocol? |
| A. | 1990 |
| B. | 1991 |
| C. | 1992 |
| D. | 1993 |
| Answer» D. 1993 | |
| 18. |
Why ozone depletion more over the South Pole? |
| A. | Due to uneven disturbance of CFCs |
| B. | Due to extreme weather conditions in the Antarctic atmosphere |
| C. | Due to cyclonic depression in South Pole |
| D. | Due to extreme pressure |
| Answer» C. Due to cyclonic depression in South Pole | |
| 19. |
Human’s respiratory system doesn’t many mechanisms that help to protect them from air pollution. |
| A. | True |
| B. | False |
| Answer» C. | |
| 20. |
Which is responsible for the greatest exposure to carbon dioxide for living organisms? |
| A. | Hurricanes |
| B. | Soil erosion |
| C. | Vehicles emission |
| D. | Cigarette smoking |
| Answer» E. | |
| 21. |
For a step-down chopper, when the duty cycle is increased the average value of the output voltage |
| A. | increases |
| B. | decreases |
| C. | remains the same |
| D. | none of the mentioned |
| Answer» B. decreases | |
| 22. |
For a step-up chopper, when the duty cycle is increased the average value of the output voltage |
| A. | increases |
| B. | decreases |
| C. | remains the same |
| D. | none of the mentioned |
| Answer» B. decreases | |
| 23. |
A step-up chopper has input voltage of 220 V and output voltage of 660 V. If the conducting time of the IGBT based chopper is 100 μs, compute Toff width of the output voltage pulse. |
| A. | 100 μs |
| B. | 150 μs |
| C. | 50 μs |
| D. | Insufficient data |
| Answer» D. Insufficient data | |
| 24. |
Find the expression for effective input resistance of a step down chopper. With R load and duty cycle = α. |
| A. | R x α |
| B. | R/2 |
| C. | 0 |
| D. | R/α |
| Answer» E. | |
| 25. |
A step down chopper is operated at 240V at duty cycle of 75%. Find the value of RMS switch (IGBT/MOSFET) current. Take R = 10 Ω. |
| A. | 2.07 A |
| B. | 200 mA |
| C. | 1.58 A |
| D. | 2.4 A |
| Answer» B. 200 mA | |
| 26. |
For a step-down chopper, find the rms value of output voltage. Let α be the duty cycle and Vs be the input voltage. |
| A. | α x Vs |
| B. | Vs/α |
| C. | √α x Vs |
| D. | Vs/2 |
| Answer» D. Vs/2 | |
| 27. |
For the below given circuit, find the output current at the instant of commutation. |
| A. | Vo/R |
| B. | Vs/R |
| C. | 0 |
| D. | α/2 |
| Answer» C. 0 | |
| 28. |
Find the average value of output voltage of a basic step-down chopper, with duty cycle = α and load = R Ω. |
| A. | I = Vs x α |
| B. | I = (Vs x α)/R |
| C. | I = 0 |
| D. | I = Vs/R |
| Answer» C. I = 0 | |
| 29. |
If a step up chopper’s switch is always kept open then (ideally) |
| A. | Vo = 0 |
| B. | Vo = ∞ |
| C. | Vo = Vs |
| D. | Vo > Vs |
| Answer» C. Vo = Vs | |
| 30. |
If a step up chopper’s switch is always kept off then (ideally) |
| A. | Vo = 0 |
| B. | Vo = ∞ |
| C. | Vo = Vs |
| D. | Vo > Vs |
| Answer» D. Vo > Vs | |
| 31. |
The guide posts are usually of height? |
| A. | 0.6m |
| B. | 0.7m |
| C. | 0.8m |
| D. | 2.0m |
| Answer» D. 2.0m | |
| 32. |
The indicators that may be marked for visible outline of the road is called __________ |
| A. | Roadway indicator |
| B. | Roadway delineator |
| C. | Roadway line |
| D. | Roadway markings |
| Answer» C. Roadway line | |
| 33. |
On a 2 phase road, the saturation flow on road A is 1000 and normal flow is 250,whereas on road B the saturation flow is 1500 and normal flow is 500,the total red time is 10 sec, find optimum cycle length. |
| A. | 35sec |
| B. | 36sec |
| C. | 37sec |
| D. | 38sec |
| Answer» D. 38sec | |
| 34. |
Which of the traffic signal method is based on saturation flow? |
| A. | Trial cycle method |
| B. | Webster method |
| C. | IRC method |
| D. | Approximate method |
| Answer» C. IRC method | |
| 35. |
If the amber time at a signal is 3 sec and the green signal time is 25sec, find the red signal time? |
| A. | 22sec |
| B. | 21sec |
| C. | 28sec |
| D. | 29sec |
| Answer» D. 29sec | |
| 36. |
There is a traffic flow of 250 vehicles on road A and 200 vehicles on road B, if the green signal time on road A is 15 sec, then the green signal time of road B is? |
| A. | 10sec |
| B. | 11sec |
| C. | 12sec |
| D. | 13sec |
| Answer» C. 12sec | |
| 37. |
In approximate method of signals, the average time taken to cross by the pedestrian is? |
| A. | 4sec |
| B. | 5sec |
| C. | 6sec |
| D. | 7sec |
| Answer» E. | |
| 38. |
If the number of cycles in trial cycle method is 20, for traffic of 170 on one road and 160 on other road, then calculate the total green time in sec. |
| A. | 38 |
| B. | 39 |
| C. | 40 |
| D. | 41 |
| Answer» E. | |
| 39. |
The number of cycles for a trial period of 45 sec is? |
| A. | 20 |
| B. | 22 |
| C. | 25 |
| D. | 30 |
| Answer» B. 22 | |
| 40. |
In trial cycle method, the average time headway is assumed as __________ |
| A. | 2sec |
| B. | 2.5sec |
| C. | 3sec |
| D. | 3.5sec |
| Answer» C. 3sec | |
| 41. |
The clearance time for amber is usually __________ |
| A. | 0.5sec |
| B. | 1sec |
| C. | 1.5sec |
| D. | 3sec |
| Answer» E. | |
| 42. |
The traffic signals that are installed for pedestrians are called __________ |
| A. | Traffic control signals |
| B. | Pedestrian signals |
| C. | Special traffic signals |
| D. | Automatic signals |
| Answer» C. Special traffic signals | |
| 43. |
One of the disadvantages of traffic signals is? |
| A. | Provide orderly moment at intersection |
| B. | The quality of the traffic flow improves |
| C. | Traffic handling capacity increases |
| D. | The rear end collision increases |
| Answer» E. | |
| 44. |
To reduce the conflict points which method is preferable? |
| A. | Restricting the entry in one side |
| B. | Widening of the roads |
| C. | Use of traffic signals |
| D. | Diverting the traffic |
| Answer» D. Diverting the traffic | |
| 45. |
How much angle accuracy is possible with a goniometer fitted with two 32400 lines radial grating? |
| A. | 0.1 second of arc |
| B. | 1 second of arc |
| C. | 2 second of arc |
| D. | 0.5 second of arc |
| Answer» B. 1 second of arc | |
| 46. |
Which of the following is true for Reading heads present in goniometer? |
| A. | There is only one reading head which is stationary |
| B. | Two readings heads and both are stationary |
| C. | There is only one reading head which is moving with a rotatable work table |
| D. | Two reading heads, one is stationary and other is rotating with work table |
| Answer» E. | |
| 47. |
Which of the following used moire gratings for angular measurements? |
| A. | Laser interferometer |
| B. | Microptic autocollimator |
| C. | Precision polygons |
| D. | Goniometer |
| Answer» E. | |
| 48. |
Which of the following option is correct for the given statements about optical instruments for angular measurements?Statement 1: Laser interferometer with two-retro reflector uses sine principle.Statement 2: Photoelectric microptic autocollimator can be used as a visual collimator. |
| A. | F, F |
| B. | T, F |
| C. | F, T |
| D. | T, T |
| Answer» E. | |
| 49. |
Which of the following is not true for autocollimators? |
| A. | Has an infinity telescope |
| B. | Has an autocollimator |
| C. | For smaller angle it is not accurate |
| D. | Very high sensitivity |
| Answer» D. Very high sensitivity | |
| 50. |
Diffusion through grain boundaries is very fast and is called short-circuit diffusion.Assertion: Their contribution to overall diffusion is negligible. |
| A. | True |
| B. | False |
| Answer» B. False | |