MCQOPTIONS
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MCQOPTIONS
This section includes 100 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 type of heating is used for sterilization? |
| A. | High frequency eddy current heating |
| B. | Coreless type heating |
| C. | Core type heating |
| D. | Dielectric heating |
| Answer» E. | |
| 2. |
With increase in temperature of the body, the emission of light waves is |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | None of these |
| Answer» B. Decreases | |
| 3. |
Which among the following is mechanical braking? |
| A. | Pneumatic braking |
| B. | Plugging |
| C. | Dynamic braking |
| D. | Regenerative braking |
| Answer» B. Plugging | |
| 4. |
When sulfate molecules reacts with the water then |
| A. | Hydrogen is liberated |
| B. | Oxygen is liberated |
| C. | Sulphurdioxide is formed |
| D. | All of these |
| Answer» C. Sulphurdioxide is formed | |
| 5. |
Voltage required for butt welding is |
| A. | 2 to 8 V |
| B. | 8 to 15 V |
| C. | 15 to 22 V |
| D. | 22 to 30 V |
| Answer» B. 8 to 15 V | |
| 6. |
Throwing power can be improved by |
| A. | Increasing distance between the anode and cathode |
| B. | By reducing the voltage drop at the cathode |
| C. | By increasing current density |
| D. | Only (a) and (b) |
| Answer» E. | |
| 7. |
Throwing power is the ability of the electrolyte to produce |
| A. | Uniform deposit on an article of regular shape |
| B. | Uniform deposit on an article of irregular shape |
| C. | Non - uniform deposit on an article of regular shape |
| D. | Non - uniform deposit on an article of irregular shape |
| Answer» C. Non - uniform deposit on an article of regular shape | |
| 8. |
Three phase induction motor is not suitable for traction purpose because |
| A. | Low starting torque |
| B. | High starting current |
| C. | Constant speed operation |
| D. | All of these |
| Answer» E. | |
| 9. |
The voltage - current characteristics of the arc welding must be |
| A. | Exponentially rising |
| B. | Drooping |
| C. | Straight line |
| D. | Parabolic |
| Answer» C. Straight line | |
| 10. |
The temperature produced in indirect arc furnace is |
| A. | More than in direct arc furnace |
| B. | Less than direct arc furnace |
| C. | Equal to direct arc furnace |
| D. | None of these |
| Answer» C. Equal to direct arc furnace | |
| 11. |
The sun’s rays reach the earth without heating the atmosphere, this is due to |
| A. | Convection |
| B. | Radiation |
| C. | Conduction |
| D. | None of these |
| Answer» C. Conduction | |
| 12. |
The suitable lamps for street lighting are |
| A. | Mercury vapour lamps |
| B. | Sodium discharge lamps |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 13. |
The steam engine drive and electric traction drive |
| A. | Both uses electricity for its operation |
| B. | Former do not use electricity at any stage of its operation and later uses electricity for its operation |
| C. | Former uses electricity for its operation and the later one do not use electricity for its operation |
| D. | Both do not use electricity at any stage for its operation |
| Answer» E. | |
| 14. |
The slope of the speed - time curve at any point gives the |
| A. | Acceleration of the train at that point of time |
| B. | Retardation of the train at that point of time |
| C. | Distance travelled by the train |
| D. | Either (a) or (b) |
| Answer» E. | |
| 15. |
The scheduled speed of a train can be increased by |
| A. | Increasing the acceleration and retardation |
| B. | Increasing the crest speed |
| C. | Decreasing the duration of stop |
| D. | All of these |
| Answer» E. | |
| 16. |
The ratio of the distance between any two stops and the sum of the time of run and the time of stop at one station is known as |
| A. | Crest speed |
| B. | Average speed |
| C. | Maximum speed |
| D. | Scheduled speed |
| Answer» E. | |
| 17. |
The rate of heat produced by dielectric heating is increased by |
| A. | Increasing frequency and voltage supply |
| B. | Increasing frequency and decreasing voltage supply |
| C. | Decreasing frequency and voltage supply |
| D. | Decreasing frequency and increasing voltage supply |
| Answer» B. Increasing frequency and decreasing voltage supply | |
| 18. |
The range of visible radiation lies between |
| A. | 2000 angstrom to 2500 angstrom |
| B. | 4000 angstrom to 4500 angstrom |
| C. | 5000 angstrom to 6000 angstrom |
| D. | 4000 angstrom to 7500 angstrom |
| Answer» E. | |
| 19. |
The propulsion of heavy vehicle is called |
| A. | Illumination |
| B. | Electric movement |
| C. | Electric traction |
| D. | Hybrid vehicle |
| Answer» D. Hybrid vehicle | |
| 20. |
The practical luminous efficiency of the sodium vapour lamp is of the order of |
| A. | 25 to 40 lumens per watt |
| B. | 40 to 45 lumens per watt |
| C. | 45 to 50 lumens per watt |
| D. | 60 to 67 lumens per watt |
| Answer» D. 60 to 67 lumens per watt | |
| 21. |
The power required for electro-deposition is |
| A. | DC and very low voltage |
| B. | DC and high voltage |
| C. | AC and very low voltage |
| D. | AC and high voltage |
| Answer» B. DC and high voltage | |
| 22. |
The polar curves are used to find out the |
| A. | MHCP |
| B. | MSCP |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 23. |
The motor which is most suitable for the traction work is / are |
| A. | DC series motor |
| B. | DC shunt motor |
| C. | Single phase ac series motor |
| D. | Three phase induction motor |
| Answer» B. DC shunt motor | |
| 24. |
The metal which can be extracted from its ore by the method of electrolysis is /are |
| A. | Zinc |
| B. | Aluminium |
| C. | Copper |
| D. | All of these |
| Answer» E. | |
| 25. |
The metal oxide rectifier used for electrolytic process is placed along with the transformer |
| A. | Inside the oil |
| B. | Outside the transformer but near to it |
| C. | Outside the transformer but far from it |
| D. | Half immersed in the oil |
| Answer» B. Outside the transformer but near to it | |
| 26. |
The main electrode of high pressure mercury vapour lamp is made up of |
| A. | Quartz |
| B. | Hard glass |
| C. | Tungsten |
| D. | Bronze |
| Answer» D. Bronze | |
| 27. |
The magnitude for the tractive effort which is required for the propulsion of the train depends on |
| A. | The adhesive weight |
| B. | Friction between the driving wheel and the track |
| C. | Both (a) and (b) |
| D. | Neither (a) nor (b) |
| Answer» D. Neither (a) nor (b) | |
| 28. |
The lighting system of almost all the earlier coaches and all the newly manufactured coaches has |
| A. | 50 V |
| B. | 110 V |
| C. | 220 V |
| D. | 420 V |
| Answer» C. 220 V | |
| 29. |
The inside wall of fluorescent tube is coated with |
| A. | Sulphur powder |
| B. | Phosphor powder |
| C. | Sodium |
| D. | Krypton |
| Answer» C. Sodium | |
| 30. |
The illumination due to good daylight is approximately equal to |
| A. | 100 lux |
| B. | 200 lux |
| C. | 300 lux |
| D. | 400 lux |
| Answer» C. 300 lux | |
| 31. |
The heat required by the weld is produced due to the contact resistance between the two pieces and is |
| A. | Directly proportional to the current |
| B. | Directly proportional to the square of the current |
| C. | Inversely proportional to the square of the current |
| D. | Inversely proportional to the current |
| Answer» C. Inversely proportional to the square of the current | |
| 32. |
The heat can be transferred from high temperature body to low temperature body by |
| A. | Conduction method |
| B. | Convection method |
| C. | Radiation method |
| D. | All of these |
| Answer» E. | |
| 33. |
The haulage capacity is more for |
| A. | Steam engine system |
| B. | Internal combustion engine drive |
| C. | Battery electric drive |
| D. | None of these |
| Answer» B. Internal combustion engine drive | |
| 34. |
The glare can be reduced by |
| A. | Decreasing the height of bright light sources |
| B. | Using glossy surfaces for bench tops |
| C. | Using reflectors to the bright sources |
| D. | All of these |
| Answer» D. All of these | |
| 35. |
The fusion welding is also known as |
| A. | Plastic welding |
| B. | Pressure welding |
| C. | Non - pressure welding |
| D. | None of these |
| Answer» D. None of these | |
| 36. |
The example of plastic welding is |
| A. | Resistance welding |
| B. | Gas welding |
| C. | Arc welding |
| D. | Thermit welding without pressure |
| Answer» B. Gas welding | |
| 37. |
The energy required for refining of gold in kWh / tone is about |
| A. | 100 to 150 |
| B. | 250 to 350 |
| C. | 300 to 350 |
| D. | 350 to 400 |
| Answer» D. 350 to 400 | |
| 38. |
The electrodes used in carbon arc welding are made up of |
| A. | Carbon |
| B. | Graphite |
| C. | Either carbon or graphite |
| D. | Zinc |
| Answer» D. Zinc | |
| 39. |
The electrodes used for projection welding are |
| A. | Flat and smaller in diameter |
| B. | Flat and larger in diameter |
| C. | Round and smaller in diameter |
| D. | Round and larger in diameter |
| Answer» C. Round and smaller in diameter | |
| 40. |
The efficiency of heating is more for |
| A. | Solid fuels |
| B. | Oil heating |
| C. | Gas heating |
| D. | Electric heating |
| Answer» E. | |
| 41. |
The dielectric strength of air gap is |
| A. | 2.11kV/cm |
| B. | 21.1kV/m |
| C. | 21.1kV/cm |
| D. | 2.11kV/m |
| Answer» D. 2.11kV/m | |
| 42. |
The current efficiency is defined as the ratio of |
| A. | Actual quantity of the substance deposited to the theoretical quantity of the substance deposited |
| B. | Actual quantity of the substance deposited to the theoretical quantity of the substance liberated |
| C. | Theoretical quantity of the substance deposited to the actual quantity of the substance deposited |
| D. | Theoretical quantity of the substance deposited to the actual quantity of the substance liberated |
| Answer» C. Theoretical quantity of the substance deposited to the actual quantity of the substance deposited | |
| 43. |
The core type induction furnace and the coreless type induction furnace are |
| A. | Low frequency, high frequency |
| B. | Low frequency, low frequency |
| C. | High frequency, high frequency |
| D. | High frequency, low frequency |
| Answer» B. Low frequency, low frequency | |
| 44. |
The artificial source of light is |
| A. | Arc lamp |
| B. | Incandescent lamp |
| C. | Discharge lamp |
| D. | All of these |
| Answer» E. | |
| 45. |
The area under the speed - time curve represents the |
| A. | Acceleration of the train |
| B. | Time taken by the train |
| C. | Distance travelled by the train |
| D. | Crest speed |
| Answer» D. Crest speed | |
| 46. |
The advantage of rectifier type welding set is |
| A. | Reduced no - load losses |
| B. | Easy arc starting |
| C. | Less hazardous |
| D. | Both (a) and (b) |
| Answer» E. | |
| 47. |
Seam welding is not used for the |
| A. | Welding in tanks |
| B. | Welding in transformers |
| C. | Welding in air crafts |
| D. | Welding alloys of copper |
| Answer» E. | |
| 48. |
Reduction factor of a source of light is the ratio of its |
| A. | Mean horizontal candle power to the mean spherical candle power |
| B. | Mean spherical candle power to the mean horizontal candle power |
| C. | Maximum horizontal candle power to the mean spherical candle power |
| D. | Mean spherical horizontal candle power to the maximum spherical candle power |
| Answer» C. Maximum horizontal candle power to the mean spherical candle power | |
| 49. |
Pantograph collector is used in railways where the train runs at 100 to 130 kmph. Which among the following is true about pantograph collector? |
| A. | It is unidirectional |
| B. | The erection of the overhead network is complicated |
| C. | Its height cannot be varied |
| D. | None of these |
| Answer» E. | |
| 50. |
Non - consumable electrodes are made of |
| A. | Carbon |
| B. | Graphite |
| C. | Either carbon or graphite |
| D. | Same material as the metal pieces to be welded |
| Answer» D. Same material as the metal pieces to be welded | |