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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. |
A rocket produces a total thrust of 20,000 N. If the mass flow rate of propellants is 16 kg/s, what will be effective exhaust velocity? |
| A. | 1250 m/s |
| B. | 2500 m/s |
| C. | 625 m/s |
| D. | 5000 m/s |
| Answer» B. 2500 m/s | |
| 2. |
Each point entered in a total station is stored in: |
| A. | Hard discs |
| B. | Electronic books |
| C. | Data storage |
| D. | Chip |
| Answer» C. Data storage | |
| 3. |
What is the range of medium range EDM? |
| A. | <5kms |
| B. | 15-25kms |
| C. | 5-25kms |
| D. | >25kms |
| Answer» D. >25kms | |
| 4. |
Total station can be used in meteorology. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
How many types of EDM instruments are there based on wavelength? |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 3 |
| Answer» E. | |
| 6. |
________ is controlled by varying ion flux and velocity. |
| A. | doping density |
| B. | doping thickness |
| C. | doping rate |
| D. | doping material |
| Answer» B. doping thickness | |
| 7. |
Which is the less costly material that can be used for first-level metal? |
| A. | gold |
| B. | platinum |
| C. | aluminium |
| D. | titanium |
| Answer» D. titanium | |
| 8. |
Cuts are not needed for |
| A. | ohmic contacts |
| B. | schottky barriers |
| C. | interconnect metallizations |
| D. | joining two layers |
| Answer» E. | |
| 9. |
The ohmic contacts are deposited by |
| A. | decomposition |
| B. | evaporation |
| C. | deposition |
| D. | mixing |
| Answer» C. deposition | |
| 10. |
Find the convolution of x1[n] = {1, 2, 3, 4} and x2[n] = {2, 1, 2, 1}. |
| A. | Y[n] = {14, 10, 14, 10} |
| B. | Y [n] = {14, 16, 14, 16} |
| C. | Y [n] = {14, 16,-14,-16} |
| D. | Y [n] = {14,-16,-14, 16} |
| Answer» C. Y [n] = {14, 16,-14,-16} | |
| 11. |
Convolve graphically the below given signals, and determine the correct sequence? |
| A. | Y (-1) = 0, y (1) = 2, y (3) = 2 |
| B. | Y (-1) = 2, y (1) = 2, y (3) = 2 |
| C. | Y (-1) = 0, y (1) = 0, y (3) = 2 |
| D. | Y (-1) = 0, y (1) = 3, y (3) = 2 |
| Answer» B. Y (-1) = 2, y (1) = 2, y (3) = 2 | |
| 12. |
Convolve the signals e-2t u(t), e-3t u(t). Determine the output? |
| A. | y(t) = (e-2t – e-3t)u(t) |
| B. | y(t) = (e-2t – e-3t) |
| C. | y(t) = (e-3t – e-2t)u(t) |
| D. | y(t) = (e-t – e-3t)u(t) |
| Answer» B. y(t) = (e-2t – e-3t) | |
| 13. |
The impulse response h (t) of an LTI system is given by e-2t.u(t) . What is the step response? |
| A. | y(t) = 1⁄2 (1 – e-2t) u (t) |
| B. | y(t) = 1⁄2 (1 – e-2t) |
| C. | y(t) = (1- e-2t) u (t) |
| D. | y(t) = 1⁄2 (e-2t) u (t) |
| Answer» B. y(t) = 1⁄2 (1 – e-2t) | |
| 14. |
Avogadro’s number of water molecules occupy 22.4 liters of space at 273 K. |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
One unified atomic mass unit equals to ____________ |
| A. | 1/12 of molar mass of Carbon |
| B. | 1/16 of atomic mass of Oxygen |
| C. | 1/2 of the molecular mass of Hydrogen |
| D. | all of the mentioned |
| Answer» E. | |
| 16. |
Species with the same number of neutrons but the different number of protons are called: |
| A. | Isotones |
| B. | Isotopes |
| C. | Isomers |
| D. | Isobars |
| Answer» B. Isotopes | |
| 17. |
Which of the following is/are the unique advantages of anodic protection? |
| A. | To monitor instantaneous corrosion rate |
| B. | Operating conditions can be established in the lab |
| C. | It is applicable for all type of metals |
| D. | To monitor instantaneous corrosion rate and operating conditions can be established in the lab |
| Answer» E. | |
| 18. |
Which of the following is/are the advantages of anodic protection than cathodic protection? |
| A. | Availability in extremely corrosive conditions |
| B. | Low current requirement |
| C. | Availability in extremely corrosive conditions and low current requirement |
| D. | Very low installation cost |
| Answer» D. Very low installation cost | |
| 19. |
Which of the following reference electrode is used in anodic protection? |
| A. | Standard hydrogen electrode |
| B. | Copper/copper sulfate reference electrode |
| C. | Standard hydrogen electrode and calomel electrode |
| D. | Calomel electrode |
| Answer» E. | |
| 20. |
Which of the following auxiliary cathode is used for anodic protection? |
| A. | Graphite |
| B. | Platinized titanium |
| C. | Platinum-clad electrode |
| D. | Aluminum electrode |
| Answer» D. Aluminum electrode | |
| 21. |
Which of the following corrosion prevention method is depicted in the given figure? |
| A. | Sacrificial anode |
| B. | Impressed current supply method |
| C. | Use of inhibitors |
| D. | Anodic protection |
| Answer» E. | |
| 22. |
A potentiostat is an electronic device that maintains a metal at a constant potential to a reference electrode. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 23. |
Which of the following metals can be protected using anodic protection? |
| A. | Nickel and iron |
| B. | Nickel, iron, and titanium |
| C. | Titanium only |
| D. | Nickel, iron, titanium, and magnesium |
| Answer» C. Titanium only | |
| 24. |
Anodic protection is based on the formation of a protective film on metals by external applied anodic currents. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 25. |
Which of the corrosion prevention method is used for reducing the maintenance cost of highway and bridges? |
| A. | Sacrificial anode |
| B. | Impressed current supply |
| C. | Anodic protection |
| D. | Use of inhibitors |
| Answer» C. Anodic protection | |
| 26. |
Calculate the output voltage of the Boost converter if the supply voltage is 1 V and duty cycle value is .9. |
| A. | 10 V |
| B. | 20 V |
| C. | 40 V |
| D. | 60 V |
| Answer» B. 20 V | |
| 27. |
Calculate the value of Crest factor if Vpeak=1.5 V and Vr.m.s=2.5 V. |
| A. | 0.4 |
| B. | .6 |
| C. | .5 |
| D. | .7 |
| Answer» C. .5 | |
| 28. |
____________ is the switching frequency of SITH. |
| A. | 55 KHz |
| B. | 100 KHz |
| C. | 91 KHz |
| D. | 105 KHz |
| Answer» C. 91 KHz | |
| 29. |
Device with highest d(i)÷d(t) and d(v)÷d(t) capability is _____________ |
| A. | GTO |
| B. | BJT |
| C. | SCR |
| D. | SITH |
| Answer» E. | |
| 30. |
What is the formula for thermal voltage? |
| A. | K×e÷T |
| B. | K×T÷e |
| C. | K2×e÷T |
| D. | K×e2÷T |
| Answer» B. K×T÷e | |
| 31. |
SCR is unipolar. |
| A. | True |
| B. | False |
| Answer» C. | |
| 32. |
The most reliable method for thyristor triggering is thermal triggering. |
| A. | True |
| B. | False |
| Answer» C. | |
| 33. |
25 V rated n SCRs are connected in series. The operation voltage of the string is 300 V and the string efficiency is 40 %. Calculate the value of n. |
| A. | 27 |
| B. | 30 |
| C. | 34 |
| D. | 36 |
| Answer» C. 34 | |
| 34. |
Calculate the string efficiency if the de-rating factor is .22. |
| A. | 78 % |
| B. | 42 % |
| C. | 20 % |
| D. | 90 % |
| Answer» B. 42 % | |
| 35. |
Calculate the De-rating factor if the string efficiency is 90 %. |
| A. | 0.4 |
| B. | .1 |
| C. | .7 |
| D. | .8 |
| Answer» B. .1 | |
| 36. |
A step-down chopper has input voltage 12 V and output voltage 2 V. Calculate the value of the duty cycle. |
| A. | 0.26 |
| B. | 0.16 |
| C. | 0.33 |
| D. | 0.41 |
| Answer» C. 0.33 | |
| 37. |
High d(v)÷d(t) causes _______________ |
| A. | Local hotspots |
| B. | False triggering |
| C. | High cost |
| D. | High-speed operation |
| Answer» C. High cost | |
| 38. |
Calculate the value of output r.m.s voltage for Single phase Full-bridge inverter if the DC supply is 25 V. |
| A. | 26 V |
| B. | 25 V |
| C. | 27 V |
| D. | 28 V |
| Answer» C. 27 V | |
| 39. |
High d(i)÷d(t) causes _______________ |
| A. | Local hotspots |
| B. | Breakdown |
| C. | High cost |
| D. | Low cost |
| Answer» B. Breakdown | |
| 40. |
Calculate the value of output r.m.s voltage for Single phase Half-bridge inverter if the DC supply is 80 V. |
| A. | 40 V |
| B. | 20 V |
| C. | 10 V |
| D. | 60 V |
| Answer» B. 20 V | |
| 41. |
Convergence rate of LMS is fast. |
| A. | True |
| B. | False |
| Answer» C. | |
| 42. |
Stochastic gradient algorithm is also called ________ |
| A. | Zero forcing algorithm |
| B. | Least mean square algorithm |
| C. | Recursive least square algorithm |
| D. | Mean square error algorithm |
| Answer» C. Recursive least square algorithm | |
| 43. |
For N symbol inputs, LMS algorithm requires ______ operations per iterations. |
| A. | 2N |
| B. | N+1 |
| C. | 2N+1 |
| D. | N2 |
| Answer» D. N2 | |
| 44. |
LMS equalizer minimizes __________ |
| A. | Computational complexity |
| B. | Cost |
| C. | Mean square error |
| D. | Power density of output signal |
| Answer» D. Power density of output signal | |
| 45. |
Zero forcing algorithm performs well for wireless links. |
| A. | True |
| B. | False |
| Answer» C. | |
| 46. |
Which of the following is not an algorithm for equalizer? |
| A. | Zero forcing algorithm |
| B. | Least mean square algorithm |
| C. | Recursive least square algorithm |
| D. | Mean square error algorithm |
| Answer» E. | |
| 47. |
Rate of convergence is defined by __________ of algorithm. |
| A. | Time span |
| B. | Number of iterations |
| C. | Accuracy |
| D. | Complexity |
| Answer» C. Accuracy | |
| 48. |
Which of the following factor could not determine the performance of algorithm? |
| A. | Structural properties |
| B. | Rate of convergence |
| C. | Computational complexity |
| D. | Numerical properties |
| Answer» B. Rate of convergence | |
| 49. |
What will be the final moment at point A? |
| A. | -108 |
| B. | 54.6 |
| C. | 0 |
| D. | 108 |
| Answer» B. 54.6 | |
| 50. |
There will be one point of discontinuity in the bending moment diagram of this question.State whether the above statement is true or false. |
| A. | true |
| B. | false |
| Answer» C. | |