MCQOPTIONS
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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. |
Illumination due to moonlight is nearly |
| A. | 1.8 lumens/meter2 |
| B. | 0.3 lumen/meter2 |
| C. | 18 lumens/meter2 |
| D. | 300 lumens/meter2 |
| E. | 30 lumens/meter2 |
| Answer» C. 18 lumens/meter2 | |
| 2. |
A 200 MW generator will invariably be |
| A. | Nitrogen cooled |
| B. | Hydrogen cooled |
| C. | Pressurised air cooled |
| D. | Oxygen cooled |
| E. | Air cooled |
| Answer» C. Pressurised air cooled | |
| 3. |
Which of the following place is not associated with nuclear power plants? |
| A. | Tarapur |
| B. | Bangalore |
| C. | Kamalappakam |
| D. | Narora |
| E. | Kora |
| Answer» C. Kamalappakam | |
| 4. |
Nagarjunsagar dam has been constructed on river |
| A. | Charnbal |
| B. | Krishna |
| C. | Kali |
| D. | Mahanadi |
| E. | Kaveri |
| Answer» C. Kali | |
| 5. |
In a hydroelectric plant a conduit-system for taking water from the intake work to the turbine is known as |
| A. | Reservoir |
| B. | Flume |
| C. | Dam |
| D. | Surge tank |
| E. | Penstock |
| Answer» F. | |
| 6. |
Which of the following method can be used for heating wood? |
| A. | Oil burner heating |
| B. | Tungsten arc heating |
| C. | Resistance heating |
| D. | Dielectric heating |
| E. | Carbon arc heating |
| Answer» E. Carbon arc heating | |
| 7. |
Careful handling of fuel is essential for which of the following power plant? |
| A. | Gas turbine power plant |
| B. | Steam power plant |
| C. | Diesel engine power plant |
| D. | Nuclear power plant |
| E. | Hydro-electric power plant |
| Answer» E. Hydro-electric power plant | |
| 8. |
In any transmission line |
| A. | AC - BD = -1 |
| B. | AC = BD + 1 |
| C. | AB - CD = -1 |
| D. | AB = CD + 1 |
| E. | ?BC = 1 - AD |
| Answer» F. | |
| 9. |
One British thermal unit (BTU) is nearly equal to |
| A. | 1053 joules |
| B. | 243 joules |
| C. | 2106 joules |
| D. | 252 joules |
| E. | 504 joules |
| Answer» B. 243 joules | |
| 10. |
Coal used in power plants is also known as |
| A. | Charcoal |
| B. | Soft coal |
| C. | Coke |
| D. | Steam coal |
| E. | Power coal |
| Answer» E. Power coal | |
| 11. |
At which of a following speed the generators for 3 phase, 50 Hz supply will not run? |
| A. | 166? rpm |
| B. | 250 rpm |
| C. | 750 rpm |
| D. | 1200 rpm |
| E. | 500 rpm |
| Answer» E. 500 rpm | |
| 12. |
A curve showing the variation of load on a power station with respect to time is known as |
| A. | Load curve |
| B. | Flow chart |
| C. | Performance curve |
| D. | Load duration curve |
| E. | Diversity factor |
| Answer» B. Flow chart | |
| 13. |
If a diesel engine has a turbochanger, it can be concluded that the engine is |
| A. | Supercharged type |
| B. | Air cooled type |
| C. | Double acting type |
| D. | Pressure lubricated |
| E. | High speed type |
| Answer» B. Air cooled type | |
| 14. |
Which of the following motor can operate on lagging as well as leading power factor? |
| A. | Squirrel cage induction motor |
| B. | Universal motor |
| C. | Capacitor run motor |
| D. | Synchronous motor |
| E. | Reluctance motor |
| Answer» E. Reluctance motor | |
| 15. |
The expected life of a GLS lamp is nearly |
| A. | 50 hours |
| B. | 10,000 hours |
| C. | 100 hours |
| D. | 1000 hours |
| E. | 5000 hours |
| Answer» E. 5000 hours | |
| 16. |
The term 'critical' is associated with which type of power plant? |
| A. | Hydro-electric power plant |
| B. | Nuclear power plant |
| C. | Steam power plant |
| D. | Gas turbine power plant |
| E. | Diesel engine power plant |
| Answer» C. Steam power plant | |
| 17. |
Which of the following disadvantages occurs due to low power factor? |
| A. | Greater conductor size |
| B. | Poor voltage regulation |
| C. | Large copper losses |
| D. | Large KVA rating of transformers |
| E. | All of the above |
| Answer» F. | |
| 18. |
Which of the following power plant has the highest cost per kW installed? |
| A. | Nuclear power plant |
| B. | Steam power plant |
| C. | Hydro-electric power |
| D. | Diesel engine power plant |
| E. | Gas turbine power plant |
| Answer» B. Steam power plant | |
| 19. |
Sodium sulphur batteries use electrolyte consisting of |
| A. | solid aluminium oxide |
| B. | dilute sulphuric acid |
| C. | brine |
| D. | KOH |
| E. | None of the above |
| Answer» C. brine | |
| 20. |
The fixed cost of a power plant depends on |
| A. | Installed capacity |
| B. | Demand factor |
| C. | Diversity factor |
| D. | Average demand |
| E. | All of the above |
| Answer» B. Demand factor | |
| 21. |
In a steam turbine cycle the lowest pressure occurs in |
| A. | Turbine inlet |
| B. | Super-heater |
| C. | Super-heater exit |
| D. | Boiler |
| E. | Condenser |
| Answer» F. | |
| 22. |
For a power plant, the cost of labour is considered as |
| A. | fixed |
| B. | variable |
| C. | progressive, non-progressive |
| D. | major, minor |
| E. | None of the above |
| Answer» C. progressive, non-progressive | |
| 23. |
Tidal energy plant in India is being located at |
| A. | Kerala |
| B. | Gujarat |
| C. | Orissa |
| D. | Tamil Nadu |
| E. | None of the above |
| Answer» C. Orissa | |
| 24. |
Least overall efficiency can be expected in which type of power plant? |
| A. | Gas turbine power plant |
| B. | Steam power plant |
| C. | Hydro-electric power plant |
| D. | Diesel engine power plant |
| E. | Nuclear power plant |
| Answer» C. Hydro-electric power plant | |
| 25. |
In a power plant, if the system voltage is dropped by 10 percent, the load will drop by about |
| A. | 1 percent |
| B. | 5 percent |
| C. | 10 percent |
| D. | 20 percent |
| E. | None of the above |
| Answer» D. 20 percent | |
| 26. |
A load curve is the relationship between load on power plant with the |
| A. | average time |
| B. | instantaneous time |
| C. | time in chronological order |
| D. | algebraic sum of times |
| E. | None of the above |
| Answer» D. algebraic sum of times | |
| 27. |
In any transmission line, which two generalised constants are equal? |
| A. | A and B |
| B. | A and C |
| C. | A and D |
| D. | B and C |
| E. | C and D |
| Answer» D. B and C | |
| 28. |
A sodium graphite reactor uses |
| A. | sodium as moderator and graphite as coolant |
| B. | sodium as coolant and graphite as moderator |
| C. | a mixture of sodium and graphite as coolant |
| D. | a mixture of sodium and graphite as moderator |
| E. | None of the above |
| Answer» C. a mixture of sodium and graphite as coolant | |
| 29. |
The advantage of dc transmission system over ac transmission system is |
| A. | dc system it economical |
| B. | there is no skin effect in dc system |
| C. | corona limits are highest for dc circuits as compared to ac circuits |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 30. |
The power factor of a load of 100 kW is to be raised from 0.5 lagging to 0.9 lagging. The KVA rating of the capacitor will be |
| A. | 125 |
| B. | 212.5 |
| C. | 25 |
| D. | 12.5 |
| E. | 75 |
| Answer» B. 212.5 | |
| 31. |
In a medium transmission line the effect of |
| A. | resistance and inductance is negligible but effect of capacitance is taken into account |
| B. | resistance is negligible |
| C. | capacitance is negligible |
| D. | inductance is negligible |
| E. | resistance, capacitance and inductance is taken into account |
| Answer» F. | |
| 32. |
The supply and distribution of electrical energy in states is controlled by |
| A. | Department of Science and Technology |
| B. | NTPC |
| C. | Electricity Board |
| D. | Department of Industries |
| E. | BHEL |
| Answer» D. Department of Industries | |
| 33. |
Total load transmitted through a 3-phase transmission line is 10,000 kW at 0.8 power factor lagging. The I2 R losses are 900 kW. The efficiency of transmission line is |
| A. | 60% |
| B. | 90% |
| C. | 95% |
| D. | 99% |
| E. | None of the above |
| Answer» C. 95% | |
| 34. |
When a 66 kV transmission line passes over a residential building, the minimum vertical clearance from the roof of the building must be |
| A. | 4 metres |
| B. | 7.5 metres |
| C. | 10 metres |
| D. | 15 metres |
| E. | None of the above |
| Answer» B. 7.5 metres | |
| 35. |
Which of the following material has high scrap value as compared to initial cost? |
| A. | Cast iron |
| B. | Copper |
| C. | Aluminium |
| D. | Steel |
| E. | Wood |
| Answer» C. Aluminium | |
| 36. |
Which of the following domestic utility item consumes least power? |
| A. | Heat convector |
| B. | Electric shaver |
| C. | Electric iron |
| D. | Desert cooler |
| E. | Toaster |
| Answer» C. Electric iron | |
| 37. |
The characteristic impedance of transmission line depends upon |
| A. | shape of the conductor |
| B. | surface treatment of the conductor |
| C. | geometrical configuration of the conductor |
| D. | conductivity of the material |
| E. | None of the above |
| Answer» D. conductivity of the material | |
| 38. |
The dimensions of generalised constants A and D are |
| A. | ohms and ohms |
| B. | mhos and ohms |
| C. | mhos and mhos |
| D. | ohms and mhos |
| E. | Both are dimensionless |
| Answer» F. | |
| 39. |
The main advantage of ac transmission system over dc transmission system is |
| A. | easy transmission |
| B. | less insulation problems |
| C. | less problems of instability |
| D. | less losses in transmission over long distances |
| E. | None of the above |
| Answer» E. None of the above | |
| 40. |
Phase, advancers for power factor improvement are generally used for |
| A. | Induction motors below 200 HP |
| B. | Are lamps of high wattage |
| C. | Transformers of 100 MVA and above |
| D. | Induction motors below 10 HP |
| E. | Induction motors below 100 HP |
| Answer» B. Are lamps of high wattage | |
| 41. |
An air preheater is an essential part of which of the following power plant? |
| A. | Steam power plant |
| B. | Hydro-electric power plant |
| C. | Gas turbine power plant |
| D. | Diesel engine power plant |
| E. | Nuclear power plant |
| Answer» B. Hydro-electric power plant | |
| 42. |
In a steam locomotive the power is generated in |
| A. | Steam turbine |
| B. | Single acting condensing steam engine |
| C. | Double acting condensing steam engine |
| D. | Double acting non-condensing steam engine |
| E. | Single acting non-condensing steam engine |
| Answer» E. Single acting non-condensing steam engine | |
| 43. |
A tidal power plant is being installed in India near |
| A. | Bay of Bengal |
| B. | Vishakhapatnam |
| C. | Gulf of Cambay |
| D. | Goa |
| E. | Cochin |
| Answer» D. Goa | |
| 44. |
The pressure of steam used in modern thermal power plants is upto |
| A. | 100 kg/cm2 |
| B. | 250 kg/cm2 |
| C. | 350 kg/cm2 |
| D. | 170 kg/cm2 |
| E. | 15 kg/cm2 |
| Answer» E. 15 kg/cm2 | |
| 45. |
As compared to copper, the conductivity of aluminium is nearly |
| A. | 60% |
| B. | 40% |
| C. | 80% |
| D. | 20% |
| E. | 85% |
| Answer» B. 40% | |
| 46. |
Water is fed to the boiler at |
| A. | Atmospheric pressure |
| B. | At 100 kg/cm2 |
| C. | Less than atmospheric pressure |
| D. | Slightly more than atmospheric pressure |
| E. | At pressure more than the steam pressure |
| Answer» F. | |
| 47. |
The standard frequency of electric power supply in India is |
| A. | 1 Hz |
| B. | 50 Hz |
| C. | 220 Hz |
| D. | 440 Hz |
| E. | 60 Hz |
| Answer» C. 220 Hz | |
| 48. |
The equipment used for pulverising is known as |
| A. | Ball mill |
| B. | Hopper |
| C. | Coke oven |
| D. | Stoker |
| E. | Burner |
| Answer» B. Hopper | |
| 49. |
The value of an equipment at the end of its useful life is known as |
| A. | Useful value |
| B. | Obsolescence value |
| C. | Demand value |
| D. | Scrap value |
| E. | Replacement value |
| Answer» E. Replacement value | |
| 50. |
In hydrothermal systems when steam water and dissolved solids are available as source of energy, the entrained solids are removed by |
| A. | filters |
| B. | centrifugal separators |
| C. | strainers |
| D. | None of the above |
| E. | None of the above |
| Answer» C. strainers | |