MCQOPTIONS
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MCQOPTIONS
This section includes 210 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 standards are applicable for designing induction motors? |
| A. | Indian standards |
| B. | British standards |
| C. | International electro technical commissions standards |
| D. | All of these |
| E. | None of these |
| Answer» E. None of these | |
| 2. |
Which part of the tower is buried in the ground? |
| A. | Anchor |
| B. | Guy wire |
| C. | Braces |
| D. | Strut inclined support |
| Answer» B. Guy wire | |
| 3. |
Which place is the ‘Regional load dispatch centre’ for the western region in the national grid? |
| A. | Mumbai |
| B. | Ahmadabad |
| C. | Bhopal |
| D. | Nagpur |
| Answer» B. Ahmadabad | |
| 4. |
Which power factor condition is not suitable for the operation of synchronous generator? |
| A. | Leading power factor |
| B. | Lagging power factor |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» B. Lagging power factor | |
| 5. |
Which properties should a material posse so as to be used for electrical equipments? i. High resistance ii. High luminosity iii. Fire retarding insulation iv. High permittivity |
| A. | i and ii only |
| B. | i and iv only |
| C. | i, iii and iv |
| D. | All of these |
| Answer» E. | |
| 6. |
Which rubber has the properties of natural rubber? |
| A. | Poly chloroprene |
| B. | Ethylene propylene rubber |
| C. | Silicon rubber |
| D. | All of these |
| Answer» C. Silicon rubber | |
| 7. |
Which sequence is followed first while closing a circuit breaker? |
| A. | Close the isolator |
| B. | Open earthing switch |
| C. | Close circuit breaker |
| D. | Any of these |
| Answer» C. Close circuit breaker | |
| 8. |
Which solutions are added into the lead acid battery? |
| A. | Distilled water |
| B. | Acid water solution |
| C. | Transformer oil |
| D. | Both (a) and (b) |
| Answer» E. | |
| 9. |
Which substance is generally added to prevent contamination of electrolyte? |
| A. | Transformer oil |
| B. | Paraffin oil |
| C. | A small piece of zinc |
| D. | None of these |
| Answer» C. A small piece of zinc | |
| 10. |
Which system present in the synchronous motor makes it costlier than Induction motor of the same size? |
| A. | Damper windings |
| B. | Additional excitation system |
| C. | Additional field windings |
| D. | None of these |
| Answer» C. Additional field windings | |
| 11. |
Which systems are present in the excitation systems of a larger synchronous generator? |
| A. | Rectification only |
| B. | Cooling system only |
| C. | Control functions only |
| D. | All of these |
| Answer» E. | |
| 12. |
Which test is a special type of test performed on the transformers? |
| A. | Partial discharge |
| B. | Temperature rise test |
| C. | Ratio and polarity test |
| D. | Noise level test |
| Answer» B. Temperature rise test | |
| 13. |
Which test is conducted to confirm the withstanding capabilities of insulation? |
| A. | One minute power frequency withstand test |
| B. | Lightning impulse withstand test |
| C. | Switching impulse withstand test |
| D. | All of these |
| Answer» E. | |
| 14. |
Which type of cooling system is preferred for turbo alternators? |
| A. | Forced air |
| B. | Hydrogen |
| C. | Water cooled |
| D. | Only (b) & (c) |
| E. | All of these |
| Answer» F. | |
| 15. |
Which type of enclosure is provided for DC motors used in coal handling plants? |
| A. | Screen protected |
| B. | Open type |
| C. | Totally enclosed fan cooled |
| D. | Drip proof |
| Answer» D. Drip proof | |
| 16. |
Which type of foundation is preferred for lattice towers? |
| A. | Rock foundation |
| B. | Pole foundation |
| C. | Anchor foundation |
| D. | All of these |
| E. | None of these |
| Answer» E. None of these | |
| 17. |
Which type of insulation is preferred if the maximum temperature is 130°? |
| A. | Class A |
| B. | Class B |
| C. | Class E |
| D. | Class F |
| Answer» C. Class E | |
| 18. |
Which type of rotor is designed for synchronous motor rating upto 5 kW? |
| A. | Squirrel cage rotor |
| B. | Slip ring rotor |
| C. | Salient pole rotor |
| D. | Cylindrical rotor |
| Answer» B. Slip ring rotor | |
| 19. |
Which type of rotor is used by Hydro Generators? |
| A. | Salient pole |
| B. | Cylindrical rotor |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» B. Cylindrical rotor | |
| 20. |
Which type of rotor is used for single phase induction motor? |
| A. | Wound rotor |
| B. | Squirrel cage rotor |
| C. | Both (A) & (B) |
| D. | None of these |
| Answer» C. Both (A) & (B) | |
| 21. |
Which type of structure is preferred in modern stations? |
| A. | Aluminium alloy structure |
| B. | Galvanised steel structure |
| C. | Fabricated structure |
| D. | All of these |
| Answer» C. Fabricated structure | |
| 22. |
Which types of bearings are used for fractional HP motors? i. Sleeve bearing ii. Ball bearing iii. Roller bearing iv. Needle bearing |
| A. | i & ii only |
| B. | ii & iii only |
| C. | iii & iv only |
| D. | i, ii, iii & iv |
| Answer» B. ii & iii only | |
| 23. |
Which types of joints are commonly used to form a string in a string insulator? |
| A. | Ball and socket joint |
| B. | Clevis and tongue coupling |
| C. | Only connector joints |
| D. | Both (a) and (b) |
| E. | All the above |
| Answer» E. All the above | |
| 24. |
Why are the high voltage test conducted on the rotating machine? |
| A. | To check the winding resistance |
| B. | To check the insulation of windings |
| C. | To check the maximum power rating of the machine |
| D. | All of these |
| E. | None of these |
| Answer» C. To check the maximum power rating of the machine | |
| 25. |
Which motor is preferred for cement industry? |
| A. | Squirrel cage motor |
| B. | Synchronous motor |
| C. | Universal motor |
| D. | DC series motor |
| Answer» C. Universal motor | |
| 26. |
Which method of voltage control is applied for long line AC transmissions? |
| A. | Switching by shunt capacitors |
| B. | Tap changing transformers |
| C. | Switching by shunt reactors |
| D. | Static Var sources |
| Answer» D. Static Var sources | |
| 27. |
Which method of connection is preferred for VTs? |
| A. | V – V connection |
| B. | Star – star connection |
| C. | Star - open delta |
| D. | All of these |
| E. | None of these |
| Answer» E. None of these | |
| 28. |
Which method is used to measure the speed of a synchronous machine? |
| A. | Stroboscopic method |
| B. | By tachometer |
| C. | By measuring the frequency by means of frequency meter |
| D. | Only a and b |
| E. | All of these |
| Answer» F. | |
| 29. |
Which method is used for locating cable fault? |
| A. | Bridge method |
| B. | Tracer method |
| C. | Both bridge and tracer method |
| D. | None of these |
| Answer» D. None of these | |
| 30. |
Which method is used for obtaining starting torque in a single phase induction motor? |
| A. | Resistance split phase starting |
| B. | Capacitor start capacitor run |
| C. | Permanent split capacitor motor |
| D. | Only a and c |
| E. | All of these |
| Answer» F. | |
| 31. |
Which measuring is used for the measurement of insulation resistance? |
| A. | Kelvin’s bridge |
| B. | Wheatstone bridge |
| C. | Megger |
| D. | Both (b) and (c) |
| Answer» D. Both (b) and (c) | |
| 32. |
Which material is used for indoor bus bar? |
| A. | Copper |
| B. | Aluminium |
| C. | Silver |
| D. | Both (A) and (B) |
| Answer» B. Aluminium | |
| 33. |
Which material is used for the manufacture of brushes in DC motors? |
| A. | Graphite |
| B. | Lead |
| C. | Copper |
| D. | All of these |
| Answer» B. Lead | |
| 34. |
Which material is used as a conducting material in electrical machines? i. Copper ii. Aluminium iii. Nickel iv. Iron |
| A. | i, iii and iv |
| B. | ii and iv only |
| C. | i and ii only |
| D. | i and iv only |
| Answer» D. i and iv only | |
| 35. |
Which material has a lower dielectric strength at 50 Hz? |
| A. | Bakelite |
| B. | Glass |
| C. | Air |
| D. | Dielectric oil |
| Answer» D. Dielectric oil | |
| 36. |
Which material can be used upto a temperature of 130° C? |
| A. | Mica |
| B. | Cotton |
| C. | Synthetic resin |
| D. | All of these |
| Answer» B. Cotton | |
| 37. |
Which instrument is present in the power line carrier communication system? |
| A. | Multiplexer |
| B. | Tuning unit |
| C. | SCADA |
| D. | None of these |
| Answer» C. SCADA | |
| 38. |
Which gel ensures the dryness of the incoming air in the breather? |
| A. | Potassium gel |
| B. | Silica gel |
| C. | Carbon gel |
| D. | All of these |
| Answer» C. Carbon gel | |
| 39. |
Which factor is controlled by turbine and governor? |
| A. | Voltage |
| B. | Frequency |
| C. | Power factor |
| D. | All of these |
| Answer» C. Power factor | |
| 40. |
Which equipments are installed in the main substation? |
| A. | Auxiliary switchgear |
| B. | Low voltage AC switchgear |
| C. | Low voltage DC switchgear |
| D. | Only (a) & (b) |
| E. | All of these |
| Answer» F. | |
| 41. |
Which equipment is used for EHV lines to improve power transferability? |
| A. | Shunt capacitor |
| B. | Shunt reactor |
| C. | Series capacitor |
| D. | All of these |
| Answer» D. All of these | |
| 42. |
Which enclosures are preferred for preventing entry of falling water or dirt? |
| A. | Totally enclosed |
| B. | Drip splash or hose proof |
| C. | Open end bracket |
| D. | All of these |
| Answer» C. Open end bracket | |
| 43. |
Which element is used as the cathode in lead acid battery? |
| A. | Sponge lead |
| B. | Lead peroxide |
| C. | Rubber mixed with lead |
| D. | None of these |
| Answer» B. Lead peroxide | |
| 44. |
Which element is used as an anode in a dry cell? |
| A. | Carbon |
| B. | Zinc |
| C. | Lead |
| D. | Zinc sulphate |
| Answer» B. Zinc | |
| 45. |
Which device is connected in series? |
| A. | RC surge suppressors |
| B. | Smoothing reactors |
| C. | Metal oxide veristors |
| D. | Static balancer |
| Answer» C. Metal oxide veristors | |
| 46. |
Which cooling technique is employed for large turbo alternators? |
| A. | Forced air cooling |
| B. | Hydrogen cooling |
| C. | Direct water cooling |
| D. | Only (b) & (c) |
| E. | All of these |
| Answer» F. | |
| 47. |
Which cooling system is employed for large transformers? |
| A. | Oil natural oil forced |
| B. | Oil natural air forced |
| C. | Oil forced air forced |
| D. | Both (b) and (c) |
| E. | All of these |
| Answer» E. All of these | |
| 48. |
Which connection is preferred for connecting line tap changers to transformers? |
| A. | 3 wire 3 phase AC system |
| B. | 3 wire 2 phase AC system |
| C. | 4 wire 3 phase AC system |
| D. | All of these |
| Answer» D. All of these | |
| 49. |
Which circuit among the following requires a supply of 48 V DC source? |
| A. | Trip coils and closing coils |
| B. | Micro wave protection and communication |
| C. | Dc measuring instruments |
| D. | All of these |
| E. | None of these |
| Answer» C. Dc measuring instruments | |
| 50. |
Which charging method is preferred to avoid sulphating of batteries? |
| A. | Initial charging |
| B. | Trickle charging |
| C. | Quick charging |
| D. | All of these |
| Answer» C. Quick charging | |