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. |
Burning of low grade fuels can be improved by |
| A. | Blending with better quality |
| B. | Oil assisted ignition |
| C. | Pulverising |
| D. | Any of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 2. |
Deuterium oxide is used in nuclear reactors as |
| A. | fuel |
| B. | moderator |
| C. | shield |
| D. | regulator |
| E. | None of the above |
| Answer» C. shield | |
| 3. |
The average cost of power per kWh for domestic consumers in India is |
| A. | 10 to 15 paise |
| B. | 20 to 30 paise |
| C. | 30 to 45 paise |
| D. | 50 to 65 paise |
| E. | None of the above |
| Answer» E. None of the above | |
| 4. |
The skin effect of a conductor will reduce as |
| A. | the diameter increases |
| B. | the frequency increases |
| C. | the permeability of conductor material increases |
| D. | the resistivity of conductor material increases |
| E. | None of the above |
| Answer» E. None of the above | |
| 5. |
The expected life of wooden poles is |
| A. | 1 year |
| B. | 5 years |
| C. | 15 years |
| D. | 50 years |
| E. | None of the above |
| Answer» D. 50 years | |
| 6. |
Which of the following is a natural solid fuel? |
| A. | Pulverised coal |
| B. | Wood charcoal |
| C. | Bituminous coal |
| D. | Coking coal |
| E. | None of the above |
| Answer» D. Coking coal | |
| 7. |
The major disadvantage with solar cells for power generation is |
| A. | lack of availability |
| B. | large area requirement |
| C. | variable power |
| D. | high cost |
| E. | None of the above |
| Answer» E. None of the above | |
| 8. |
Heat rate : Efficiency |
| A. | Coal : Oil |
| B. | Momentum : Variable cost |
| C. | Fixed cost : Variable cost |
| D. | Resistance : Conductance |
| E. | None of the above |
| Answer» E. None of the above | |
| 9. |
An Orsat apparatus gives |
| A. | volumetric analysis |
| B. | gravimetric analysis |
| C. | approximate analysis |
| D. | only presence of constituents |
| E. | None of the above |
| Answer» B. gravimetric analysis | |
| 10. |
Naphtha is a volatile colourless product obtained from |
| A. | methyl alcohol |
| B. | vinyl acetate |
| C. | sugar cane |
| D. | petroleum |
| E. | None of the above |
| Answer» E. None of the above | |
| 11. |
Barytes concrete is generally used in |
| A. | nuclear power plants |
| B. | construction of dams |
| C. | foundations for heavy equipment |
| D. | construction of cooling towers |
| E. | None of the above |
| Answer» B. construction of dams | |
| 12. |
In case the supply frequency is reduced from 50 Hz to 1 Hz which method of heating will be least affected? |
| A. | Resistance heating |
| B. | Dielectric heating |
| C. | Induction heating |
| D. | All of the above |
| E. | None of the above |
| Answer» B. Dielectric heating | |
| 13. |
No moving parts are required in |
| A. | MHD generator |
| B. | Tidal power plant |
| C. | Thermionic conversion |
| D. | OTEC power plant |
| E. | None of the above |
| Answer» D. OTEC power plant | |
| 14. |
Which of the following colour has wavelength between green and red colour? |
| A. | Yellow |
| B. | Blue |
| C. | Violet |
| D. | All of the above |
| E. | None of the above |
| Answer» B. Blue | |
| 15. |
Chain gate stokers cannot be used for |
| A. | coal lumps |
| B. | low ash content coals |
| C. | high ash content coals |
| D. | None of the above |
| E. | None of the above |
| Answer» D. None of the above | |
| 16. |
The disadvantage of using solar evergy for power production is |
| A. | Requirements of large area for harnessing solar energy |
| B. | Energy available during day time only |
| C. | Energy not available during cloudy weather |
| D. | Initial cost is high |
| E. | All of the above |
| Answer» F. | |
| 17. |
Economiser in a steam power plant is used |
| A. | To preheat air |
| B. | To preheat feed water |
| C. | To superheat steam |
| D. | None of the above |
| E. | None of the above |
| Answer» C. To superheat steam | |
| 18. |
For under water movement of a submarine the power is provided by |
| A. | Batteries |
| B. | Thermoionic converters |
| C. | Solar energy |
| D. | Geothermal energy |
| E. | Tidal energy |
| Answer» B. Thermoionic converters | |
| 19. |
Bottoming cycle in case of combined cycle power geneation is normally |
| A. | Gas turbine cycle |
| B. | Steam cycle |
| C. | any of the above |
| D. | None of the above |
| E. | None of the above |
| Answer» C. any of the above | |
| 20. |
The illumination level in the houses is usually in the range |
| A. | 2500 to 3000 lumens/m2 |
| B. | 10 to 20 lumens/m2 |
| C. | 1200 to 1600 lumens/m2 |
| D. | 100 to 1400 lumens/m2 |
| E. | 400 to 650 lumens/m2 |
| Answer» E. 400 to 650 lumens/m2 | |
| 21. |
Which of the following is considered to be superior quality coal for power plants? |
| A. | Lignite |
| B. | Coke |
| C. | Pulverised coal |
| D. | Peat |
| E. | Bituminous coal |
| Answer» F. | |
| 22. |
When pulverised fuel is not used the equipment used for feeding coal to the boiler is |
| A. | Burner |
| B. | Stoker |
| C. | Heater |
| D. | Regenerator |
| E. | Feed pump |
| Answer» C. Heater | |
| 23. |
The specific gravity of aluminium is |
| A. | 1.71 |
| B. | 4.71 |
| C. | 2.71 |
| D. | 5.71 |
| E. | 3.71 |
| Answer» D. 5.71 | |
| 24. |
The formula for Cetane is |
| A. | C10H24 |
| B. | C6H15 |
| C. | C12H32 |
| D. | C16H34 |
| E. | C10H12 |
| Answer» E. C10H12 | |
| 25. |
The vacuum inside a incandescent lamp is of the order of |
| A. | 10-3 mm Hg |
| B. | 10-2 mm Hg |
| C. | 10-4 mm Hg |
| D. | 10-5 mm Hg |
| E. | 10-6 mm Hg |
| Answer» D. 10-5 mm Hg | |
| 26. |
In a boiler, the carry over of slugs of water into the piping due to dirty water is termed as |
| A. | beating |
| B. | foaming |
| C. | scalping |
| D. | pitting |
| E. | None of the above |
| Answer» C. scalping | |
| 27. |
Under no load conditions the current in a transmission line is due to |
| A. | corona effects |
| B. | capacitance of the line |
| C. | back flow from earth |
| D. | spinning reserve |
| E. | None of the above |
| Answer» C. back flow from earth | |
| 28. |
Which of the following equipment has power factor closer to unity |
| A. | Carbon arc lamp |
| B. | Single phase capacitor motor |
| C. | Fluorescent lamp |
| D. | Induction motor |
| E. | GLS lamp |
| Answer» F. | |
| 29. |
A graphical representation of discharge and time is known as |
| A. | Hectograph |
| B. | Hydrograph |
| C. | Load duration curve |
| D. | Load curve |
| E. | Monograph |
| Answer» C. Load duration curve | |
| 30. |
Due to burning of one kg of pure carbon with a minimum quantity of air required, the percentage of carbondioxide in the exhaust gases would be |
| A. | 10% |
| B. | 100% |
| C. | 58% |
| D. | 11.50% |
| E. | 29% |
| Answer» F. | |
| 31. |
Which of the following enters the super heater of a boiler? |
| A. | Wet steam |
| B. | Cold water |
| C. | Dry steam |
| D. | Hot water |
| E. | Superheated steam |
| Answer» D. Hot water | |
| 32. |
One kilowatt hour is nearly equal to |
| A. | 3.4 B.T.U. |
| B. | 34 B.T.U. |
| C. | 34000 B.T.U. |
| D. | 3400 B.T.U. |
| E. | 340 B.T.U. |
| Answer» E. 340 B.T.U. | |
| 33. |
A turbocharger is a part of |
| A. | Gas turbine power plant |
| B. | Thermal power plant |
| C. | Diesel engine power plant |
| D. | Hydro-electric power plant |
| E. | Nuclear power plant |
| Answer» D. Hydro-electric power plant | |
| 34. |
In pumped storage plant |
| A. | Water is recirculated through turbines |
| B. | Downstream water is pumped upstream during off-load periods |
| C. | Pressure accumulators are used |
| D. | Power is produced by pumps |
| E. | Water is stored by pumping to high pressures |
| Answer» C. Pressure accumulators are used | |
| 35. |
Power factor is expected to be highest in case of |
| A. | Tube lights |
| B. | Carbon arc lamp |
| C. | Sodium lamps |
| D. | Mercury vapour lamp |
| E. | GLS lamp |
| Answer» F. | |
| 36. |
First aid for an electric shock victim is |
| A. | Artificial respiration |
| B. | Rubbing the skin |
| C. | Pouring water on body |
| D. | Bandage |
| E. | Massage |
| Answer» B. Rubbing the skin | |
| 37. |
The permissible pH value of water of boilers is |
| A. | 1 |
| B. | Less than 14 |
| C. | 7 |
| D. | 5 |
| E. | Slightly more than 7 |
| Answer» F. | |
| 38. |
For extinguishing electrical fires |
| A. | Carbondioxide fire extinguisher should be used |
| B. | Carbon tetrachloride fire extinguisher should be used |
| C. | Rubber pieces should be thrown |
| D. | Conductors should be erthed |
| E. | Water should be sprinkled |
| Answer» C. Rubber pieces should be thrown | |
| 39. |
Which of the following engine has the highest air-fuel ratio? |
| A. | Diesel engine |
| B. | Petrol engine |
| C. | Gas engine |
| D. | Gas turbine |
| E. | All above has got nearly same air fuel ratio |
| Answer» E. All above has got nearly same air fuel ratio | |
| 40. |
The useful life of static capacitor can be expected to be |
| A. | 2 to 3 months |
| B. | 8 to 10 years |
| C. | 1 to 2 years |
| D. | 6 to 8 months |
| E. | 50 to 100 years |
| Answer» C. 1 to 2 years | |
| 41. |
The critical pressure water is |
| A. | Less than 200 kg/cm2 |
| B. | 100 kg/cm2 |
| C. | More than 200 kg/cm2 |
| D. | 1 atm |
| E. | 150 kg/cm2 |
| Answer» D. 1 atm | |
| 42. |
A single unit of 50 MW is generally not available with which type of power plant? |
| A. | Nuclear power plant |
| B. | Diesel engine power plant |
| C. | Steam power plant |
| D. | Hydro-electric power plant |
| E. | Gas turbine power plant |
| Answer» C. Steam power plant | |
| 43. |
Visible spectrum of light has wavelength in the range |
| A. | 10 to 40 A |
| B. | 4000 to 7000 A |
| C. | 14,000 to 17,000 A |
| D. | 100 to 400 A |
| E. | 40,000 to 70,000 A |
| Answer» C. 14,000 to 17,000 A | |
| 44. |
The cost of fuel is least in case of |
| A. | Nuclear power plant |
| B. | Diesel engine power plant |
| C. | Gas turbine power plants |
| D. | Steam power plant |
| E. | Hydro-electric power plant |
| Answer» F. | |
| 45. |
Which of the following state in India is relatively rich in coal deposits? |
| A. | Rajasthan |
| B. | Andhra Pradesh |
| C. | Kerala |
| D. | Bihar |
| E. | U.P. |
| Answer» E. U.P. | |
| 46. |
A 3 phase 15 kW induction motor has a p.f. of 0.75 lagging. A bank of capacitor is connected in delta across the supply terminals and p.f. raised to 0.9 lagging. The KVAR rating of the capacitors connected in each phase will be nearly |
| A. | 1 |
| B. | 250 |
| C. | 4 |
| D. | 2 |
| E. | 20 |
| Answer» E. 20 | |
| 47. |
Steam pressure of super-thermal power plant is |
| A. | 100 kg/cm2 |
| B. | 50 kg/cm2 |
| C. | 200 kg/cm2 |
| D. | 15 kg/cm2 |
| E. | 170 kg/cm2 |
| Answer» F. | |
| 48. |
Which of the following equipment is not installed in a substation? |
| A. | Exciters |
| B. | Series capacitors |
| C. | Shunt reactors |
| D. | Voltage transformers |
| E. | None of the above |
| Answer» B. Series capacitors | |
| 49. |
If 3 MW power is to be transmitted over a distance of 30 km, the desirable transmission voltage will be |
| A. | 11 kV |
| B. | 33 kV |
| C. | 66 kV |
| D. | 132 kV |
| E. | None of the above |
| Answer» C. 66 kV | |
| 50. |
Which of the following is an advantage of using static capacitors of power factor improvement? |
| A. | Low losses within the capacitors |
| B. | No rotating parts |
| C. | Can be easily installed |
| D. | Can work under normal atmospheric conditions |
| E. | All of the above |
| Answer» F. | |