MCQOPTIONS
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MCQOPTIONS
This section includes 55 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ? |
| A. | Reduced current method |
| B. | Tap changing control of transformer |
| C. | Series parallel operation of motors |
| D. | All of the above |
| Answer» C. Series parallel operation of motors | |
| 2. |
Which of the following is the disadvantage of electric traction over other systems of traction ? |
| A. | Corrosion problems in the under-ground pipe work |
| B. | Short time power failure interrupts traffic for hours |
| C. | High capital outlay in fixed installations beside route limitation |
| D. | Interference with communication lines |
| E. | All of the above |
| Answer» D. Interference with communication lines | |
| 3. |
Which of the following is an advantage of electric traction over other methods of traction ? |
| A. | Faster acceleration |
| B. | No pollution problems |
| C. | Better braking action |
| D. | All of the above |
| Answer» B. No pollution problems | |
| 4. |
Which of the following braking systems is used on steam locomotives ? |
| A. | Hydraulic system |
| B. | Pneumatic system |
| C. | Vacuum system |
| D. | None of the above |
| Answer» D. None of the above | |
| 5. |
When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when_______________? |
| A. | wheel base of axles is more |
| B. | degree of curvature is more |
| C. | both A. and B. |
| D. | none of the above |
| Answer» D. none of the above | |
| 6. |
_______________watt-hours per tonne km is usually the specific energy consumption for suburban services? |
| A. | 15—20 |
| B. | 50—75 |
| C. | 120—150 |
| D. | 160—200 |
| Answer» C. 120—150 | |
| 7. |
Vacuum is created by which of the following ? |
| A. | Vacuum pump |
| B. | Ejector |
| C. | Any of the above |
| D. | None of the above |
| Answer» D. None of the above | |
| 8. |
Tractive effort is required to_____________? |
| A. | overcome the gravity component of train mass |
| B. | overcome friction, windage and curve resistance |
| C. | accelerate the train mass |
| D. | do all of the above |
| Answer» E. | |
| 9. |
The wheels of a train, engine as well as bogies, are slightly tapered to_____________? |
| A. | reduce friction |
| B. | increase friction |
| C. | facilitate braking |
| D. | facilitate in taking turns |
| Answer» E. | |
| 10. |
The voltage used for suburban trains in D.C. system is usually_______________? |
| A. | 12 V |
| B. | 24 V |
| C. | 220 V |
| D. | 600 to 750 V |
| Answer» E. | |
| 11. |
The value of co-efficient of adhesion will be high when rails are_________________? |
| A. | greased |
| B. | wet |
| C. | sprayed with oil |
| D. | cleaned with sand |
| Answer» E. | |
| 12. |
The steam engine provided on steam locomotives is____________? |
| A. | single acting condensing type |
| B. | single acting non-condensing type |
| C. | double acting condensing type |
| D. | double acting non-condensing type |
| Answer» C. double acting condensing type | |
| 13. |
The speed of a superfast train is______________? |
| A. | 60 kmph |
| B. | 75 kmph |
| C. | 100 kmph |
| D. | more than 100 kmph |
| Answer» E. | |
| 14. |
The speed of a locomotive is controlled by_______________? |
| A. | flywheel |
| B. | gear box |
| C. | applying brakes 11 |
| D. | regulating steam flow to engine |
| Answer» E. | |
| 15. |
The return circuit for tramcars is through_______________? |
| A. | neutral wire |
| B. | rails |
| C. | cables |
| D. | common earthing |
| Answer» C. cables | |
| 16. |
The resistance encountered by a train in motion is on account of_________________? |
| A. | resistance offered by air |
| B. | friction at the track |
| C. | friction at various parts of the rolling stock |
| D. | all of the above |
| Answer» E. | |
| 17. |
The rate of acceleration on suburban orurban services is restricted by the consideration of______________? |
| A. | Engine power |
| B. | Track curves |
| C. | Passenger Discomfort |
| D. | Track size |
| Answer» D. Track size | |
| 18. |
The rate of acceleration on suburban orurban service is in the range_________________? |
| A. | 0.2 to 0.5 km phps |
| B. | 1.6 to 4.0 km phps |
| C. | 5 to 10 km phps |
| D. | 15 to 25 km phps |
| Answer» C. 5 to 10 km phps | |
| 19. |
The pulsating torque exerted by steam locomotives causes which of the following ? |
| A. | Jolting and skidding |
| B. | Hammer blow |
| C. | Pitching |
| D. | All of the above |
| Answer» B. Hammer blow | |
| 20. |
The overall efficiency of steam locomotive is around_____________? |
| A. | 5 to 10 percent |
| B. | 15 to 20 percent |
| C. | 25 to 35 percent |
| D. | 35 to 45 percent |
| Answer» B. 15 to 20 percent | |
| 21. |
The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to_____________/ |
| A. | 5 |
| B. | 10 |
| C. | 14 |
| D. | 17 |
| Answer» C. 14 | |
| 22. |
The normal value of adhesion friction is______________? |
| A. | 0.12 |
| B. | 0.25 |
| C. | 0.40 |
| D. | 0.75 |
| Answer» C. 0.40 | |
| 23. |
The horsepower of steam locomotives is______________? |
| A. | up to 1500 |
| B. | 1500 to 2000 |
| C. | 2000 to 3000 |
| D. | 3000 to 4000 |
| Answer» B. 1500 to 2000 | |
| 24. |
The friction at the track is proportional to________________? |
| A. | 1/speed |
| B. | l/(speed)2 |
| C. | speed |
| D. | none of the above |
| Answer» D. none of the above | |
| 25. |
The efficiency of diesel locomotives is nearly_______________? |
| A. | 20 to 25 percent |
| B. | 30 to 40 percent |
| C. | 45 to 55 percent |
| D. | 60 to 70 percent |
| Answer» B. 30 to 40 percent | |
| 26. |
The coasting retardation is around_________________? |
| A. | 0.16 km phps |
| B. | 1.6 km phps |
| C. | 16 km phps |
| D. | 40 km phps |
| Answer» B. 1.6 km phps | |
| 27. |
The braking retardation is usually in the range__________________? |
| A. | 0.15 to 0.30 km phps |
| B. | 0.30 to 0.6 km phps |
| C. | 0.6 to 2.4 km phps |
| D. | 3 to 5 km phps |
| E. | 10 to 15 km phps |
| Answer» E. 10 to 15 km phps | |
| 28. |
The air resistance to the movement of the train is proportional to_____________? |
| A. | speed |
| B. | (speed) |
| C. | (speed). |
| D. | 1/speed |
| Answer» C. (speed). | |
| 29. |
Quadrilateral speed-time curve pertains to which of the following services ? |
| A. | Main line service |
| B. | Urban service |
| C. | Sub-urban service |
| D. | Urban and sub-urban service |
| Answer» E. | |
| 30. |
Power for lighting in passanger coach, in a long distance electric train, is provided_________________? |
| A. | directly through overhead electric line |
| B. | through individual generator of bogie and batteries |
| C. | through rails |
| D. | through locomotive |
| Answer» C. through rails | |
| 31. |
Overload capacity of diesel engines is usually restricted to_______________? |
| A. | 2 percent |
| B. | 10 percent |
| C. | 20 percent |
| D. | 40 percent |
| Answer» B. 10 percent | |
| 32. |
Overhead lines for power supply to tramcars are at a minimum height of______________? |
| A. | 3 m |
| B. | 6 m |
| C. | 10 m |
| D. | 15 m |
| Answer» D. 15 m | |
| 33. |
_______________method can bring the locomotive to dead stop? |
| A. | Plugging braking |
| B. | Rheostatic braking |
| C. | Regenerative braking |
| D. | None of the above |
| Answer» B. Rheostatic braking | |
| 34. |
Main traction systems used in India are, those using______________? |
| A. | electric locomotives |
| B. | diesel engine locomotives |
| C. | steam engine locomotives |
| D. | diesel electric locomotives |
| E. | all of the above |
| Answer» F. | |
| 35. |
Locomotives with monometer bogies have_________________? |
| A. | uneven distribution of tractive effect |
| B. | suitability for passanger as well as freight service |
| C. | lot of skidding |
| D. | low co-efficient of adhesion |
| Answer» C. lot of skidding | |
| 36. |
Locomotive having monomotor bogies________________? |
| A. | has better coefficient of adhesion |
| B. | are suited both for passanger as well as freight service |
| C. | has better riding qualities due to the reduction of lateral forces |
| D. | has all above qualities |
| Answer» E. | |
| 37. |
_________ locomotive has the highest operational availability? |
| A. | Electric |
| B. | Diesel |
| C. | Steam |
| Answer» B. Diesel | |
| 38. |
In main line service as compared to urban and suburban service______________? |
| A. | distance between the stops is more |
| B. | maximum speed reached is high |
| C. | acceleration and retardation rates are low |
| D. | all of the above |
| Answer» E. | |
| 39. |
In case of steam engines the steam pressure is_______________? |
| A. | 1 to 4 kgf/cm2 |
| B. | 5 to 8 kgf/cm2 |
| C. | 10 to 15 kgf/cm2 |
| D. | 25 to 35 kgf/cm2 |
| Answer» D. 25 to 35 kgf/cm2 | |
| 40. |
In case of locomotives the tractive power is provided by______________? |
| A. | single cylinder double acting steam engine |
| B. | double cylinder, single acting steam engine |
| C. | double cylinder, double acting steam engine |
| D. | single stage steam turbine |
| Answer» D. single stage steam turbine | |
| 41. |
In case of _________________ free running and coasting periods are generally long ? |
| A. | main-line service |
| B. | urban service |
| C. | sub-urban service |
| D. | all of the above |
| Answer» B. urban service | |
| 42. |
In case of a steam engine an average coal consumption per km is nearly________________? |
| A. | 150 to 175 kg |
| B. | 100 to 120 kg |
| C. | 60 to 80 kg |
| D. | 28 to 30 kg |
| Answer» E. | |
| 43. |
In a steam locomotive electric power is provided through_____________? |
| A. | overhead wire |
| B. | battery system |
| C. | small turbo-generator |
| D. | diesel engine generator |
| Answer» D. diesel engine generator | |
| 44. |
If the co-efficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails ? |
| A. | 0.3 |
| B. | 0.26 |
| C. | 0.225 |
| D. | 0.16 |
| Answer» E. | |
| 45. |
have maximum unbalanced forces_______________? |
| A. | Diesel shunters |
| B. | Steam locomotives |
| C. | Electric locomotives |
| D. | Diesel locomotives |
| Answer» C. Electric locomotives | |
| 46. |
________________ frequency is not common in low frequency traction system? |
| A. | 40 Hz |
| B. | 25 Hz |
| C. | 16 Hz |
| D. | non of these |
| Answer» B. 25 Hz | |
| 47. |
For which of the following locomotives the maintenance requirements are the least ? |
| A. | Steam locomotives |
| B. | Diesel locomotives |
| C. | Electric locomotives |
| D. | Equal in all of the above |
| Answer» C. Electric locomotives | |
| 48. |
For given maximum axle load tractive efforts of AC. locomotive will be_____________? |
| A. | less than that of D.C. locomotive |
| B. | more than that of D.C. locomotive |
| C. | equal to that of D.C. locomotive |
| D. | none of the above |
| Answer» C. equal to that of D.C. locomotive | |
| 49. |
For diesel locomotives the range of horsepower is_______________? |
| A. | 50 to 200 |
| B. | 500 to 1000 |
| C. | 1500 to 2500 |
| D. | 3000 to 5000 |
| Answer» D. 3000 to 5000 | |
| 50. |
For 25 kV single phase system power supply frequency is_______________? |
| A. | 60 Hz |
| B. | 50 Hz |
| C. | 25 Hz |
| D. | 16 Hz |
| Answer» C. 25 Hz | |