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. |
The tax imposed on power supplied to consumers is known as |
| A. | excise duty |
| B. | sales tax |
| C. | toll tax |
| D. | electricity duty |
| E. | None of the above |
| Answer» E. None of the above | |
| 2. |
The chemical composition of coal is given by |
| A. | Proximate analysis |
| B. | Ultimate analysis |
| C. | Orsat analysis |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Orsat analysis | |
| 3. |
The compressor used in gas turbine is usually |
| A. | Lobe type compressor |
| B. | Multistage axial flow compressor |
| C. | Screw compressor |
| D. | Multistage reciprocating compressor |
| E. | Single stage reciprocating compressor |
| Answer» C. Screw compressor | |
| 4. |
By increasing sag in the suspended transmission line |
| A. | Tension in the line decreases |
| B. | Tension in the line increases |
| C. | Current carrying capacity of conductor increases |
| D. | Current carrying capacity of conductor decreases |
| E. | None of the above |
| Answer» B. Tension in the line increases | |
| 5. |
Neglecting losses in a transmission system, if the voltage is doubled for the same power transmission, the weight of conductor material required will be |
| A. | four times |
| B. | double |
| C. | half |
| D. | one-fourth |
| E. | None of the above |
| Answer» E. None of the above | |
| 6. |
If K be the volume of conductor for two wire dc system, then for the same voltage the volume of conductor for 3 wire dc system for supplying the same load will be |
| A. | 0.25 K |
| B. | 2 K |
| C. | 1.25 K |
| D. | 0.3125 K |
| E. | 5 K |
| Answer» E. 5 K | |
| 7. |
Sweet gas is free of |
| A. | crabon dioxide |
| B. | carbon monoxide |
| C. | nitrogen |
| D. | hydrogen sulphide |
| E. | None of the above |
| Answer» E. None of the above | |
| 8. |
The voltage of a 2 wire de system is raised from 200 V to 400 V. For the same power transmitted over the same distance and for the same power loss, the saving in conductor copper will be |
| A. | 25% |
| B. | 40% |
| C. | 50% |
| D. | 60% |
| E. | 75% |
| Answer» F. | |
| 9. |
Conductors for high voltage transmission lines are suspended from towers |
| A. | to reduce clearance from ground |
| B. | to increase clearance from ground |
| C. | to reduce wind and snow loads |
| D. | to take care of extension in length during summer |
| E. | None of the above |
| Answer» E. None of the above | |
| 10. |
Which of the following power plant can be installed within the shortest possible time? |
| A. | Gas turbine power plant |
| B. | Hydro-electric power plant |
| C. | Steam power plant |
| D. | Nuclear power plant |
| E. | Diesel engine power plant |
| Answer» F. | |
| 11. |
Corona usually occurs when the electrostatic stress in the air around the conductor exceeds |
| A. | 32 kV (maximum values)/cm |
| B. | 22 kV (maximum value)/cm |
| C. | 11 kV (rms value)/cm |
| D. | 6.6 kV (rms value)/cm |
| E. | None of the above |
| Answer» B. 22 kV (maximum value)/cm | |
| 12. |
Solid or liquid particles of microscopic size which are suspended in air or another gas from what is known as |
| A. | aerosol |
| B. | hyperon |
| C. | geognosy |
| D. | eluvium |
| E. | None of the above |
| Answer» B. hyperon | |
| 13. |
The major share of power in India is provided by which of the following type of power plant? |
| A. | Gas turbine power plants |
| B. | Hydro-electric power plant |
| C. | Diesel engine power plant |
| D. | Nuclear power plant |
| E. | Steam power plant |
| Answer» F. | |
| 14. |
Which of the following power plant can generate power at unpredictable or uncontrolled times? |
| A. | Wind power plant |
| B. | Tidal power plant |
| C. | Solar power plant |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 15. |
Which plant has least pollution problem? |
| A. | Steam power plant |
| B. | Nuclear power plant |
| C. | Gas turbine power plant |
| D. | Hydro-electric power plant |
| E. | Diesel engine power plant |
| Answer» E. Diesel engine power plant | |
| 16. |
In a diesel engine, the consumption of diesel oil per BHP per hour is nearly |
| A. | 1250 grams |
| B. | 10 grams |
| C. | 100 grams |
| D. | 850 grams |
| E. | 200 grams |
| Answer» F. | |
| 17. |
The percentage of carbon in anthracite is generally |
| A. | more than 90% |
| B. | around 75% |
| C. | between 50% and 70% |
| D. | below 50% |
| E. | None of the above |
| Answer» B. around 75% | |
| 18. |
The most economic voltage for transmitting given power over a known distance by overhead transmission lines is approximately |
| A. | 0.6 kV/km |
| B. | 1.6 kV/km |
| C. | 2.6 kV/km |
| D. | 3.6 kV/km |
| E. | None of the above |
| Answer» B. 1.6 kV/km | |
| 19. |
The calorific value of diesel oil is expected to be around |
| A. | 21000 kcal/kg |
| B. | 5000 kcal/kg |
| C. | 16000 kcal/kg |
| D. | 1000 kcal/kg |
| E. | 11000 kcal/kg |
| Answer» F. | |
| 20. |
Most of the thermal power plants in India are using |
| A. | bagasse as fuel |
| B. | lignite as fuel |
| C. | pulverized fuel |
| D. | peat as fuel |
| E. | None of the above |
| Answer» D. peat as fuel | |
| 21. |
The specific gravity of diesel oil is closer to |
| A. | 2.7 |
| B. | 0.35 |
| C. | 1 |
| D. | 0.84 |
| E. | 1.35 |
| Answer» E. 1.35 | |
| 22. |
Approximately how many kg of air are required for the combustion of one kg of diesel oil? |
| A. | 5 kg |
| B. | 35 kg |
| C. | 25 kg |
| D. | 15 kg |
| E. | 1 kg |
| Answer» E. 1 kg | |
| 23. |
In high voltage transmission lines the top most conductor is |
| A. | R-phase conductor |
| B. | Y-phase conductor |
| C. | B-phase conductor |
| D. | Earth conductor |
| E. | None of the above |
| Answer» E. None of the above | |
| 24. |
Most power generating units are conservatively rated. For short durations, these units can be easily overloaded by about |
| A. | 1 to 2 percent |
| B. | 10 to 15 percent |
| C. | 25 to 30 percent |
| D. | 40 to 50 percent |
| E. | None of the above |
| Answer» C. 25 to 30 percent | |
| 25. |
Most of the generators in thermal power plants run at |
| A. | 15000 rpm |
| B. | 3000 rpm |
| C. | 750 rpm |
| D. | 1000 rpm |
| E. | 1500 rpm |
| Answer» C. 750 rpm | |
| 26. |
In a fluorescent tube circuit, choke acts as a |
| A. | A starter |
| B. | A source of heat |
| C. | A device for improving the power factor |
| D. | A current limiting device |
| E. | None of the above |
| Answer» E. None of the above | |
| 27. |
The fact that a conductor carries more current on the surface as compared to core is known as |
| A. | skin effect |
| B. | corona |
| C. | permeability |
| D. | unsymmetrical fault |
| E. | None of the above |
| Answer» B. corona | |
| 28. |
A metallic sheath is provided on cable |
| A. | to protect against moisture, gases and other damaging liquids |
| B. | to protect from mechanical damage due to rubbing |
| C. | to protect against sparking |
| D. | to avoid damage to the cable during laying |
| E. | All of the above |
| Answer» B. to protect from mechanical damage due to rubbing | |
| 29. |
Which arrangement of poles is used for the installation of transformers and circuit breakers? |
| A. | I type |
| B. | J type |
| C. | H type |
| D. | L type |
| E. | None of the above |
| Answer» D. L type | |
| 30. |
The material used for insulation on the cable is |
| A. | Impregnated paper |
| B. | Varnished cambric |
| C. | Rubber mineral compound |
| D. | Any of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 31. |
When geothermal energy is available in the form of saline water, power is developed using |
| A. | flashed - steam system |
| B. | binary - cycle system |
| C. | total flow system |
| D. | any of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 32. |
The thickness of the layer of insulation on a cable depends on |
| A. | kW |
| B. | KVA |
| C. | Voltage |
| D. | Current carrying capacity of conductor |
| E. | Power factor |
| Answer» D. Current carrying capacity of conductor | |
| 33. |
The insulation material for a cable should have |
| A. | High dielectric strength |
| B. | High inechanical strength |
| C. | Non-inflammability |
| D. | Low cost |
| E. | All of the above |
| Answer» F. | |
| 34. |
Hyperon has mass |
| A. | greater than that of a proton and less than that of a deuteron |
| B. | less than that of a proton and more than that of a deutron |
| C. | more than that of a proton as well as deutron |
| D. | less than that of a proton as well as deutron |
| E. | None of the above |
| Answer» B. less than that of a proton and more than that of a deutron | |
| 35. |
Winds caused by greater solar heating of the earth's surface near the equator than near the northern or southern poles, are known as |
| A. | local winds |
| B. | equatorial winds |
| C. | planetary winds |
| D. | trade winds |
| E. | None of the above |
| Answer» D. trade winds | |
| 36. |
Certain metals become super-conducting when cooled below |
| A. | melting point |
| B. | transition temperature |
| C. | 0?K |
| D. | 0?C |
| E. | None of the above |
| Answer» C. 0?K | |
| 37. |
Earth coal is |
| A. | lignite |
| B. | coal dust |
| C. | black earth |
| D. | wet coal |
| E. | None of the above |
| Answer» B. coal dust | |
| 38. |
During storm the live conductor of public electric supply breaks of down and touches the earth. The consequence will be |
| A. | supply voltage will drop |
| B. | supply voltage will increase |
| C. | current will flow to earth |
| D. | no current will flow in the conductor |
| E. | None of the above |
| Answer» D. no current will flow in the conductor | |
| 39. |
Particles having the same atomic number but different mass unmbers are called |
| A. | Ions |
| B. | Positrons |
| C. | Isotopes |
| D. | Decayed particles |
| E. | Beta particles |
| Answer» D. Decayed particles | |
| 40. |
Illuminating gas is |
| A. | blast furnace gas |
| B. | coal and carburretted water gas |
| C. | methane gas |
| D. | light petroleum gas |
| E. | None of the above |
| Answer» C. methane gas | |
| 41. |
The location of which power plant is mainly decided by the geographical factors? |
| A. | Diesel engine power plant |
| B. | Hydro-electric power plant |
| C. | Steam power plant |
| D. | Nuclear power plant |
| E. | Gas turbine power plant |
| Answer» C. Steam power plant | |
| 42. |
The calorific value of natural gas is expected to be around |
| A. | 2000 kcal/m3 |
| B. | 500 kcal/m3 |
| C. | 1500 kcal/m3 |
| D. | 2500 kcal/m3 |
| E. | 25000 kcal/m3 |
| Answer» C. 1500 kcal/m3 | |
| 43. |
Which of the following gas is sometimes filled in filament lamps? |
| A. | Hydrogen |
| B. | Helium |
| C. | Argon |
| D. | Ozone |
| E. | Oxygen |
| Answer» D. Ozone | |
| 44. |
Exosphere is the space beyond the earth's atmosphere. It begins at a height of about |
| A. | 100 km |
| B. | 220 km |
| C. | 400 km |
| D. | 1000 km |
| E. | None of the above |
| Answer» E. None of the above | |
| 45. |
The power loss in an overhead transmission line is mainly due to |
| A. | Line resistance |
| B. | Line inductance |
| C. | Heat loss |
| D. | Magnetic loss |
| E. | All of the above |
| Answer» B. Line inductance | |
| 46. |
Compressed air is required in diesel engine power plants mainly for |
| A. | Starting the engine |
| B. | Cleaning |
| C. | On fiteration |
| D. | Water aeration |
| E. | All of the above |
| Answer» B. Cleaning | |
| 47. |
Tidal energy source mainly makes use of |
| A. | kinetic energy of water |
| B. | potential energy of water |
| C. | both kinetic as well as potential energy of water |
| D. | None of the above |
| E. | None of the above |
| Answer» C. both kinetic as well as potential energy of water | |
| 48. |
Benefication process is mainly used for |
| A. | coals |
| B. | oils |
| C. | nuclides |
| D. | minerals |
| E. | None of the above |
| Answer» B. oils | |
| 49. |
A layer of fibrous material like jute or hessian type provided over metallic sheath on a cable is known as |
| A. | Armouring |
| B. | Bedding |
| C. | Laying |
| D. | Cover |
| E. | None of the above |
| Answer» C. Laying | |
| 50. |
Fluidized bed combustion helps to reduce |
| A. | boiler size |
| B. | pollution |
| C. | both (A) and (B) above |
| D. | None of the above |
| Answer» D. None of the above | |