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. |
Sag is provided in overhead transmission lines so that |
| A. | Repairs can be done easily |
| B. | Corona can be reduced |
| C. | Skia effect can be reduced |
| D. | Safe tension is not exceeded |
| E. | None of the above |
| Answer» E. None of the above | |
| 2. |
Which of the following factor affects corona? |
| A. | Atmospheric conditions |
| B. | Conductor size |
| C. | Spacing between conductors |
| D. | Line voltage |
| E. | All of the above |
| Answer» F. | |
| 3. |
Baume's scale measures |
| A. | purity of water |
| B. | radioactivity |
| C. | specific gravity of liquids |
| D. | specific gravity of gases |
| E. | None of the above |
| Answer» D. specific gravity of gases | |
| 4. |
A chimney is not a part of which of the following type of power plant? |
| A. | Steam power plant |
| B. | Diesel engine power plant |
| C. | Gas turbine power plant |
| D. | Hydro-electric power plant |
| E. | All of the above |
| Answer» E. All of the above | |
| 5. |
Raniganj is famous for |
| A. | Thorium deposits |
| B. | Oil fields |
| C. | LPG |
| D. | Coal |
| E. | None of the above |
| Answer» E. None of the above | |
| 6. |
the main cause of power loss in a transmission line is |
| A. | Resistance |
| B. | capacitance is negligible |
| C. | Inductance |
| D. | Both inductance and capacitance |
| E. | None of the above |
| Answer» B. capacitance is negligible | |
| 7. |
Fixed carbon in case of biogas is around |
| A. | 12.5 percent |
| B. | 25 percent |
| C. | 40 percent |
| D. | 68 percent |
| E. | None of the above |
| Answer» B. 25 percent | |
| 8. |
The power factor of a 3 phase induction motor will be least |
| A. | at no load |
| B. | at 80% load |
| C. | at 25% load |
| D. | at full load |
| E. | at 5% load |
| Answer» B. at 80% load | |
| 9. |
Which type of insulators are used on 132 kV transmission lines? |
| A. | Pin type |
| B. | Disc type |
| C. | Shackle type |
| D. | Pin and shackle type |
| E. | None of the above |
| Answer» C. Shackle type | |
| 10. |
The depreciation rate for an equipment is generally decided in light of |
| A. | Sales tax rules |
| B. | Excise duty rules |
| C. | Income tax rules |
| D. | Electricity duty rules |
| E. | None of the above |
| Answer» D. Electricity duty rules | |
| 11. |
Steel poles used for telephone lines are generally |
| A. | painted |
| B. | plated |
| C. | galvanized |
| D. | blackened |
| E. | None of the above |
| Answer» D. blackened | |
| 12. |
The function of steel wire in a ACSR conductor is |
| A. | to take care of voltage surges |
| B. | to prevent corona |
| C. | to reduce inductance and hence improve power factor |
| D. | to provide additional mechanical strength |
| E. | None of the above |
| Answer» E. None of the above | |
| 13. |
Standby losses are least in case of |
| A. | Steam power plant |
| B. | Nuclear power plant |
| C. | Diesel engine power plant |
| D. | Hydro-electric power plant |
| E. | Gas turbine power plant |
| Answer» E. Gas turbine power plant | |
| 14. |
A 132 kV transmission line carrying power through a distance of 250 kilometers will be termed as |
| A. | Very short transmission line |
| B. | Short transmission line |
| C. | Long transmission line |
| D. | Trunk line |
| E. | None of the above |
| Answer» D. Trunk line | |
| 15. |
Skin effects depends upon |
| A. | size of the conductor |
| B. | frequency of the current |
| C. | resistivity of the conductor |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 16. |
Therm is a unit of |
| A. | radioactivity |
| B. | heating value |
| C. | wind speed |
| D. | tidal wave |
| E. | None of the above |
| Answer» C. wind speed | |
| 17. |
Which of the following will need the lower level of illumination? |
| A. | Hospital wards |
| B. | Display |
| C. | Railway platform |
| D. | Auditoriums |
| E. | Green rooms |
| Answer» D. Auditoriums | |
| 18. |
A pin type insulator is generally used upto |
| A. | 11 kV |
| B. | 132 kV |
| C. | 66 kV |
| D. | 33 kV |
| E. | 1.1 kV |
| Answer» E. 1.1 kV | |
| 19. |
A jet aircraft is powered by |
| A. | Gas turbine |
| B. | Solar cells |
| C. | Batteries |
| D. | Petrol engines |
| E. | Diesel engines |
| Answer» B. Solar cells | |
| 20. |
Maximum horse power of a steam locomotive is |
| A. | 2500 |
| B. | 100 |
| C. | 1500 |
| D. | 5000 |
| E. | 500 |
| Answer» D. 5000 | |
| 21. |
Death is almost certain when the current through human body is |
| A. | 100 milli-amperes |
| B. | 100 micro-amperes |
| C. | 10 micro-amperes |
| D. | 10 milli-amperes |
| E. | 25 micro-amperes |
| Answer» B. 100 micro-amperes | |
| 22. |
A ship is powered by |
| A. | Diesel turbine |
| B. | Steam turbines, diesel engines, hydraulic turbines or nuclear reactors |
| C. | Steam turbines, diesel engines hydraulic turbines |
| D. | Steam turbine |
| E. | Steam turbines or diesel engines |
| Answer» F. | |
| 23. |
Out of the following which one is not a unconventional source of energy? |
| A. | Geothermal energy |
| B. | Tidal power |
| C. | Wind power |
| D. | Nuclear energy |
| E. | Magneto hydrodynamic generator |
| Answer» E. Magneto hydrodynamic generator | |
| 24. |
In which of the following state manufacturing unit of M/S Bharat Heavy Electricals Ltd. Is not located? |
| A. | Rajasthan |
| B. | Andhra Pardesh |
| C. | U.P. |
| D. | Karnataka |
| E. | M.P. |
| Answer» B. Andhra Pardesh | |
| 25. |
Highly skilled manpower is needed for the maintendance of which of the following power plants? |
| A. | Nuclear power plant |
| B. | Gas turbine power plant |
| C. | Hydro-electric power plant |
| D. | Steam power plant |
| E. | Diesel engine power plant |
| Answer» B. Gas turbine power plant | |
| 26. |
A 66 kV transmission line carrying power to a distance of 120 kilometre will be termed as |
| A. | Very short transmission line |
| B. | Long transmission line |
| C. | Medium transmission line |
| D. | Tiny transmission line |
| E. | Short transmission line |
| Answer» D. Tiny transmission line | |
| 27. |
One calorie is the same as |
| A. | 4.18 joules |
| B. | 1 dyne-sec |
| C. | 1 watt |
| D. | 1 dyne |
| E. | 4.11 watts |
| Answer» B. 1 dyne-sec | |
| 28. |
Diesel engine fuels are rated by |
| A. | Cetane number |
| B. | HUCR |
| C. | Octane number |
| D. | CFR number |
| E. | Calorific value |
| Answer» B. HUCR | |
| 29. |
The maximum number of generators in a power plant must be |
| A. | One |
| B. | Even |
| C. | Two |
| D. | Odd |
| E. | Three |
| Answer» D. Odd | |
| 30. |
The wavelength of green colour is nearly |
| A. | 4000 A |
| B. | 5500 A |
| C. | 2500 A |
| D. | 7500 A |
| E. | 1000 A |
| Answer» C. 2500 A | |
| 31. |
Pressure cables are used for |
| A. | Low power factors |
| B. | Higher voltages |
| C. | High kW |
| D. | High KVA |
| E. | High current ratings |
| Answer» C. High kW | |
| 32. |
The specific gravity of copper is |
| A. | 8.9 |
| B. | 5.9 |
| C. | 13.9 |
| D. | 16.9 |
| E. | 2.9 |
| Answer» C. 13.9 | |
| 33. |
In a thermal power plant, among the variable costs, fuel accounts for nearly |
| A. | 20 to 25 percent of total cost |
| B. | 30 to 50 percent of total cost |
| C. | 75 to 80 percent of total cost |
| D. | 90 to 98 percent of total cost |
| E. | None of the above |
| Answer» D. 90 to 98 percent of total cost | |
| 34. |
Candela is the unit of |
| A. | Luminous flux |
| B. | Luminous intensity |
| C. | Wavelength |
| D. | Brightness |
| E. | None of the above |
| Answer» C. Wavelength | |
| 35. |
Which relay is used on transmission lines? |
| A. | Thermal relay |
| B. | Buchholz relay |
| C. | MHO relay |
| D. | Reactance relay |
| E. | None of the above |
| Answer» D. Reactance relay | |
| 36. |
The string efficiency in an ac system is |
| A. | 100% |
| B. | Zero |
| C. | 50% |
| D. | 25% |
| E. | 70.70% |
| Answer» B. Zero | |
| 37. |
In steam power plants exhaust steam from turbine goes to |
| A. | cooling tower |
| B. | economiser |
| C. | condenser |
| D. | air preheater |
| E. | None of the above |
| Answer» D. air preheater | |
| 38. |
Satellites are powered by |
| A. | Batteries |
| B. | Solar cells |
| C. | Photo electric cells |
| D. | Thermo-electric generators |
| E. | Thermoionic converters |
| Answer» C. Photo electric cells | |
| 39. |
The initial cost of an equipment is Rs. 20 lakhs and depreciated cost after ten years is Rs. 15 lakhs. The useful life of the equipment is |
| A. | 5 years |
| B. | 15 years |
| C. | 20 years |
| D. | Cannot be determined on the basis of the information provided |
| E. | 10 years |
| Answer» E. 10 years | |
| 40. |
For low head and high discharge the hydraulic turbine preferred is |
| A. | Jonval turbine |
| B. | Francis turbine |
| C. | Kaplan turbine |
| D. | Fourneyron turbine |
| E. | Pelton wheel |
| Answer» D. Fourneyron turbine | |
| 41. |
Bottoming cycle is common in |
| A. | cement plants |
| B. | sugar millls |
| C. | paper mills |
| D. | All of the above |
| E. | None of the above |
| Answer» B. sugar millls | |
| 42. |
Low utilization factor for a power plant indicates that |
| A. | plant is under maintendance |
| B. | plant is used for base load only |
| C. | plant is used for standby purpose only |
| D. | plant is used for peak load as well as base load |
| E. | None of the above |
| Answer» D. plant is used for peak load as well as base load | |
| 43. |
Which of the following domestic utility item consumes maximum power? |
| A. | Ceiling fan |
| B. | Exhaust fan |
| C. | Cooking range |
| D. | Refrigerator |
| E. | Mixer grinder |
| Answer» D. Refrigerator | |
| 44. |
The unit of luminous flux is |
| A. | Steradian |
| B. | Candela |
| C. | Lumen |
| D. | Lux |
| E. | None of the above |
| Answer» D. Lux | |
| 45. |
The output of a solar cell is of the order of |
| A. | 0.1 W |
| B. | 0.5 W |
| C. | 1 W |
| D. | 5 W |
| E. | None of the above |
| Answer» C. 1 W | |
| 46. |
If the capacitance between two conductors of a 3 phse line is 4 |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 12 |
| E. | All of the above |
| Answer» C. 8 | |
| 47. |
Guard ring transmission line |
| A. | improves power factor |
| B. | reduces earth capacitance of the lowest unit |
| C. | reduces transmission losses |
| D. | improves regulation |
| E. | None of the above |
| Answer» C. reduces transmission losses | |
| 48. |
Metals approach superconductivity condition |
| A. | at high temperatures |
| B. | at melting point |
| C. | near 0?C |
| D. | near absolute zero |
| E. | None of the above |
| Answer» E. None of the above | |
| 49. |
Radio carbon has half life of |
| A. | 17 years |
| B. | 117 years |
| C. | 557 years |
| D. | 5770 years |
| E. | None of the above |
| Answer» E. None of the above | |
| 50. |
Compressed air is required generally in which of the following power plants? |
| A. | Nuclear power plant |
| B. | Hydro-electric power plant |
| C. | Steam power plant |
| D. | Diesel engine power plant |
| E. | All of the above |
| Answer» E. All of the above | |