MCQOPTIONS
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MCQOPTIONS
This section includes 50 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Behaviour knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The hardening magnitude, in precipitation hardenable alloys, doesn’t depend on alloy composition. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
In Al-Cu alloys, ϴ” phase is ____ coherent with matrix. |
| A. | Fully |
| B. | Semi |
| C. | Non |
| D. | In |
| Answer» B. Semi | |
| 3. |
Coherency between the precipitating phase and the matrix phase is required for precipitation hardening. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
In the second step of precipitation hardening, alloy is heated to ____ temperature. |
| A. | Melting |
| B. | Homogenizing |
| C. | Solutionizing |
| D. | Ageing |
| Answer» E. | |
| 5. |
In the first step of precipitation hardening, alloy is heated to ____ temperature. |
| A. | Recrystallization |
| B. | Melting |
| C. | Ageing |
| D. | Homogenizing |
| Answer» E. | |
| 6. |
For precipitation hardening, the alloy should exhibit decreasing solid solubility with ______ |
| A. | Increasing temperature |
| B. | Decreasing temperature |
| C. | Increasing pressure |
| D. | Decreasing pressure |
| Answer» C. Increasing pressure | |
| 7. |
With an increase in the size of precipitate particle, magnitude of strengthening ______ |
| A. | Decreases |
| B. | Increases |
| C. | Remains constant |
| D. | First increases then decrease |
| Answer» E. | |
| 8. |
What is the ageing temperature of Al-4%Cu alloy? |
| A. | 160°C |
| B. | 130°C |
| C. | 218°C |
| D. | 850°C |
| Answer» C. 218°C | |
| 9. |
Isohytes are the imaginary lines joining the points of equal |
| A. | Pressure |
| B. | Height |
| C. | Humidity |
| D. | Rainfall |
| Answer» E. | |
| 10. |
In India, which of the following is adopted as standard recording raingauge? |
| A. | Symon's raingauge |
| B. | Tipping bucket type |
| C. | Syphon type |
| D. | Weighing bucket type |
| Answer» D. Weighing bucket type | |
| 11. |
Annual rainfall values at station A in mm for the years 2011 to 2010 are given in the table below. If simple central 3-year moving mean of this rainfall record is calculated, the maximum and minimum values in the moving mean list would beValues in the moving mean list would beYear2001200220032004200520062007200820092010Annual Rainfall P at Station A(mm)586621618639689610591604621650 |
| A. | 689 mm and 602 mm |
| B. | 649 mm and 602 mm |
| C. | 689 nun and 586 mm |
| D. | 649 tom and 586 mm |
| Answer» C. 689 nun and 586 mm | |
| 12. |
Humidity refers to the_________. |
| A. | volume of the air |
| B. | water vapor in the air |
| C. | pressure of the moisture |
| D. | mass of the air |
| Answer» C. pressure of the moisture | |
| 13. |
In India, average annual rainfall is the mean of the annual rainfalls measured over a period of how many years? |
| A. | 14 |
| B. | 28 |
| C. | 40 |
| D. | 35 |
| E. | 21 |
| Answer» E. 21 | |
| 14. |
A planimeter measures the area of figure, traversed clockwise with anchor point inside and tracking with M = 100 cm2, additive constant C = 20, initial reading 3.436, final reading 8.945. The zero mark of the dial passed the index once in the reverse direction. The area measured was: |
| A. | 1914.7 cm2 |
| B. | 1760.8 cm2 |
| C. | 1550.9 cm2 |
| D. | 1108.16 cm2 |
| Answer» D. 1108.16 cm2 | |
| 15. |
How many additional rain gauges are required in a catchment, if the error allowed in estimation of mean rainfall is to be reduced by half than the present one ? |
| A. | Equal to the present number |
| B. | Twice the present number |
| C. | Thrice the present number |
| D. | Four times the present number |
| Answer» D. Four times the present number | |
| 16. |
According to Indian standards, the number of rain gauge stations for an area of 5200 km2 in plain should be |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 40 |
| Answer» B. 15 | |
| 17. |
As per Indian Standards, in predominantly hilly areas with heavy rainfall, there should be 1 rain gauge station per ________ km2 |
| A. | 520 |
| B. | 330 |
| C. | 130 |
| D. | 30 |
| Answer» D. 30 | |
| 18. |
Isohyetal method is used for determination of |
| A. | evapotranspiration |
| B. | seepage loss |
| C. | precipitation |
| D. | intensity of flood |
| Answer» D. intensity of flood | |
| 19. |
Convective precipitation is caused due to:i. Upward movement of air warmer than its surroundings.ii. Air striking mountainsWhich of these is/are correct? |
| A. | Only i |
| B. | Only ii |
| C. | Both of the above |
| D. | Neither i nor ii |
| Answer» B. Only ii | |
| 20. |
______is a non-automatic type rain gauge used by the Meteorological Department of the Government of India. |
| A. | Symon's rain gauge |
| B. | Weighing bucket rain gauge |
| C. | Tipping bucket type rain gauge |
| D. | Float type rain gauge |
| E. | Inglis type rain gauge |
| Answer» B. Weighing bucket rain gauge | |
| 21. |
A Double-Mass-Curve Analysis is useful in |
| A. | Storage Computation |
| B. | Consistency Analysis |
| C. | Frequency Analysis |
| D. | Guessing missing data in cases of non- homogeneous terrain |
| Answer» C. Frequency Analysis | |
| 22. |
A catchment may be idealized as a rectangle There are three rain gauges located inside the catchment at arbitrary locations. The average precipitation over the catchment is estimated by two methods: (i) Arithmetic mean (PA) and (ii) Thiessen polygon (PT).Which of the following statements is correct? |
| A. | PA is always equal to PT |
| B. | There is no definite relationship between PA and PT |
| C. | PA is always greater than PT |
| D. | PA is always smaller than PT |
| Answer» C. PA is always greater than PT | |
| 23. |
Evaporation losses from surface of a reservoir can be reduced by sprinkling: |
| A. | DDT |
| B. | Cetyl alcohol |
| C. | Potassium permanganate |
| D. | None of the above |
| Answer» C. Potassium permanganate | |
| 24. |
Over a basin of area 333 km2, a storm of 6 h with uniform intensity of 2 cm/h occurs. The observed run off was 20 × 106 m3. The average rate of infiltration in mm/hr for basin is: |
| A. | 5 mm/h |
| B. | 10 mm/h |
| C. | 20 mm/h |
| D. | 40 mm/h |
| Answer» C. 20 mm/h | |
| 25. |
Consider the following statements concerning precipitation:1. The Isohyetal map method of determining the average precipitation is considering to be better than the Thiessen method.2. There is no possibility of damaging the storms because of cloud seeding activity.3. Water that percolates through the soil emerges as the dry whether flow in streams.Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» C. 2 and 3 only | |
| 26. |
In the intensity-duration analysis by Sherman, the intensity of rainfall i is represented as |
| A. | \(\frac{{{b^n}}}{{\left( {t + a} \right)}}\) |
| B. | \(\frac{{{a^n}}}{{{{\left( {t + b} \right)}^n}}}\) |
| C. | \(\frac{{{{\left( {a + t} \right)}^n}}}{b}\) |
| D. | \(\frac{a}{{{{\left( {t + b} \right)}^n}}}\) |
| Answer» E. | |
| 27. |
Depth-Area-Duration curves of precipitation are drawn as: |
| A. | Minimizing envelopes through the appropriate data points |
| B. | Maximizing envelopes through the appropriate data points |
| C. | Best fit curves through the appropriate data points |
| D. | Best fit mean straight lines through the appropriate data points |
| Answer» C. Best fit curves through the appropriate data points | |
| 28. |
Normal annual rainfall at Hulikal, the wettest station in Karnataka is about |
| A. | 120 cm |
| B. | 1500 mm |
| C. | 780 cm |
| D. | 100 m |
| Answer» D. 100 m | |
| 29. |
If the actual rainfall in a particular year is 50 cm and the average annual rainfall in that area is 75 cm, then the index of wetness is |
| A. | 150.00% |
| B. | 66.67% |
| C. | 33.33% |
| D. | 50.00% |
| E. | 100.00% |
| Answer» C. 33.33% | |
| 30. |
Evaporation is determined experimentally using |
| A. | An open pan |
| B. | A neutron probe |
| C. | A lysimeter |
| D. | An infiltrometer |
| Answer» B. A neutron probe | |
| 31. |
A plot between rainfall-intensity versus time is called: |
| A. | Isohyet |
| B. | Mass curve |
| C. | Hyetograph |
| D. | Hydrograph |
| Answer» D. Hydrograph | |
| 32. |
Orographic rain occurs when the air is cooled sufficiently as a result of |
| A. | Lifting due to flow over a mountain barrier |
| B. | Relative movement of two large air masses |
| C. | Violent upthrow of air arising from localized heating |
| D. | Cyclonic conditions |
| Answer» B. Relative movement of two large air masses | |
| 33. |
Consider the following statements:1. The normal annual rainfall of a station is obtained as the arithmetic average of the successive annual rainfall in the last 30 years.2. The “normal rainfalls” are updated by deleting the needful number of oldest years’ data from the record and adding the needful number of most recent years’ data to the record.3. The standard deviation computed for the rainfall data is taken as a measure of the variability of the rainfall during the self-same set of years.4. If the observed rainfall in any year is less than the current average annual rainfall, then that year is called a dry year.Which of the above statements are correct? |
| A. | 1, 2, 3 and 4 |
| B. | 1, 2 and 3 only |
| C. | 2 and 4 only |
| D. | 1, 3 and 4 only |
| Answer» E. | |
| 34. |
Convective precipitation is caused by: |
| A. | Cirrus clouds |
| B. | Stratiform clouds |
| C. | Cumuliform clouds |
| D. | Ogographic clouds |
| Answer» D. Ogographic clouds | |
| 35. |
Mean precipitation over an area is best obtained from the grouped amounts by |
| A. | Arithmetic mean method |
| B. | Thiessen method |
| C. | Linearly interpolated isohyetal method |
| D. | Orographically weighted isohyetal method |
| Answer» E. | |
| 36. |
IN_THE_FIRST_STEP_OF_PRECIPITATION_HARDENING,_ALLOY_IS_HEATED_TO______TEMPERATURE.?$ |
| A. | Recrystallization |
| B. | Melting |
| C. | Ageing |
| D. | Homogenizing |
| Answer» E. | |
| 37. |
Coherency between the precipitating phase and the matrix phase is required for precipitation hardening.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 38. |
In the second step of precipitation hardening, alloy is heated to ____ temperature.$ |
| A. | Melting |
| B. | Homogenizing |
| C. | Solutionizing |
| D. | Ageing |
| Answer» E. | |
| 39. |
The hardening magnitude, in precipitation hardenable alloys, doesn’t depend on alloy composition.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 40. |
Alloy in overaged condition display _____ |
| A. | Lower yield strength |
| B. | Less strain hardening rate |
| C. | Higher hardness |
| D. | Higher tensile strength |
| Answer» B. Less strain hardening rate | |
| 41. |
In Al-Cu alloys, ϴ” phase is ____ coherent with matrix.$ |
| A. | Fully |
| B. | Semi |
| C. | Non |
| D. | In |
| Answer» B. Semi | |
| 42. |
For precipitation hardening, the alloy should exhibit decreasing solid solubility with _____? |
| A. | Increasing temperature |
| B. | Decreasing temperature |
| C. | Increasing pressure |
| D. | Decreasing pressure |
| Answer» C. Increasing pressure | |
| 43. |
With an increase in the size of precipitate particle, magnitude of strengthening _____? |
| A. | Decreases |
| B. | Increases |
| C. | Remains constant |
| D. | First increases then decrease |
| Answer» E. | |
| 44. |
What is the spacing between GP-zones of Al-Cu alloy? |
| A. | 25-50 √Ö |
| B. | 50-75 √Ö |
| C. | 75-100 √Ö |
| D. | 125-150 √Ö |
| Answer» D. 125-150 ‚Äö√†√∂‚àö√± | |
| 45. |
the density of precipitated GP-zones is the order of ___ |
| A. | 10<sup>10</sup> cm<sup>-3</sup> |
| B. | 10<sup>12</sup> cm<sup>-3</sup> |
| C. | 10<sup>16</sup> cm<sup>-3</sup> |
| D. | 10<sup>18</sup> cm<sup>-3</sup> |
| Answer» E. | |
| 46. |
What are preferential planes for segregation of solute atoms in Al-Cu alloys? |
| A. | {1 1 1} |
| B. | {1 1 0} |
| C. | {2 1 0} |
| D. | {1 0 0} |
| Answer» E. | |
| 47. |
What is ageing temperature? |
| A. | 160°C |
| B. | 130°C |
| C. | 218°C |
| D. | 850°C |
| Answer» C. 218¬¨¬®‚Äö√†√ªC | |
| 48. |
What is ageing temperature of Cu-Be alloys? |
| A. | 300-320°C |
| B. | 430-650°C |
| C. | 170°C |
| D. | 850°C |
| Answer» B. 430-650¬¨¬®‚Äö√†√ªC | |
| 49. |
Which of the following is not an age hardening alloy? |
| A. | Al-Cu |
| B. | Al-Mg-Si |
| C. | Cu-Ni |
| D. | β titanium alloys |
| Answer» D. ‚âà√≠‚Äö√¢¬ß titanium alloys | |
| 50. |
Precipitation hardening is also known as ____ |
| A. | Age hardening |
| B. | Dispersion hardening |
| C. | Grain boundary strengthening |
| D. | Strain hardening |
| Answer» B. Dispersion hardening | |