McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 251. |
In pumped storage plant |
| A. | Power is produced by pumps |
| B. | Water is stored by pumping to high pressures |
| C. | Water is recirculated through turbines |
| D. | Downstream water is pumped upstream during off-load periods |
| E. | Pressure accumulators are used |
| Answer» D. Downstream water is pumped upstream during off-load periods | |
| 252. |
The effect of corona can be reduced by |
| A. | Increasing the conductor size and reducing the spacing between the conductors |
| B. | Increasing the conductor size and also by increasing the spacing between the conductors |
| C. | Reducing the conductor size and increasing the spacing between conductors |
| D. | Reducing the conductor size as well as spacing between the conductors |
| E. | None of the above |
| Answer» B. Increasing the conductor size and also by increasing the spacing between the conductors | |
| 253. |
Which of the following fuel consists almost entirely of fixed carbon and ash? |
| A. | Lignite |
| B. | peat |
| C. | wood charcoal |
| D. | coke |
| E. | None of the above |
| Answer» D. coke | |
| 254. |
ACSR conductor implies |
| A. | All conductors surface treated and realigned |
| B. | Anode current sinusoidally run |
| C. | Anodised core smoothly run |
| D. | Aluminium conductor steel reinforced |
| E. | None of the above |
| Answer» D. Aluminium conductor steel reinforced | |
| 255. |
Turnaround efficiency of battery energy storage system is around |
| A. | 75 percent |
| B. | 50 percent |
| C. | 25 percent |
| D. | 10 percent |
| E. | None of the above |
| Answer» A. 75 percent | |
| 256. |
Coal broken into angular fragments is known as |
| A. | coal briquettes |
| B. | coal breccia |
| C. | coal bank |
| D. | coal auger |
| E. | None of the above |
| Answer» B. coal breccia | |
| 257. |
A graphical representation of discharge and time is known as |
| A. | Load duration curve |
| B. | Monograph |
| C. | Hydrograph |
| D. | Load curve |
| E. | Hectograph |
| Answer» C. Hydrograph | |
| 258. |
Pulverized coal is fed to the boiler through |
| A. | stokers |
| B. | retorts |
| C. | fans |
| D. | burners |
| E. | None of the above |
| Answer» D. burners | |
| 259. |
In solar thermal conversion systems the solar heat is transferred to |
| A. | water - steam |
| B. | liquid metals |
| C. | molten salts |
| D. | any of the above |
| E. | None of the above |
| Answer» D. any of the above | |
| 260. |
Fixed carbon in case of bituminous coals is less than |
| A. | 70% |
| B. | 50% |
| C. | 35% |
| D. | 15% |
| E. | None of the above |
| Answer» A. 70% | |
| 261. |
Existence of which gs in atmosphere causes green house effect? |
| A. | Carbon dioxide |
| B. | Hydrogen sulphide |
| C. | Nitrogen |
| D. | Hydrogen |
| E. | None of the above |
| Answer» A. Carbon dioxide | |
| 262. |
In a diesel engine, the consumption of diesel oil per BHP per hour is nearly |
| A. | 10 grams |
| B. | 200 grams |
| C. | 1250 grams |
| D. | 100 grams |
| E. | 850 grams |
| Answer» B. 200 grams | |
| 263. |
First geothermal energy plant in India was tried at |
| A. | Himachal Pradesh |
| B. | Rajasthan |
| C. | Bihar |
| D. | Kerala |
| E. | None of the above |
| Answer» A. Himachal Pradesh | |
| 264. |
The formula for Cetane is |
| A. | C6H15 |
| B. | C10H24 |
| C. | C10H12 |
| D. | C16H34 |
| E. | C12H32 |
| Answer» D. C16H34 | |
| 265. |
The vacuum inside a incandescent lamp is of the order of |
| A. | 10-5 mm Hg |
| B. | 10-2 mm Hg |
| C. | 10-4 mm Hg |
| D. | 10-3 mm Hg |
| E. | 10-6 mm Hg |
| Answer» C. 10-4 mm Hg | |
| 266. |
Humacite is the name associated with |
| A. | lignites |
| B. | radioactive minerals |
| C. | bitumins |
| D. | refrigerants |
| E. | None of the above |
| Answer» C. bitumins | |
| 267. |
Tidal energy plant in India is being located at |
| A. | Kerala |
| B. | Gujarat |
| C. | Orissa |
| D. | Tamil Nadu |
| E. | None of the above |
| Answer» B. Gujarat | |
| 268. |
When pulverised fuel is not used the equipment used for feeding coal to the boiler is |
| A. | Stoker |
| B. | Regenerator |
| C. | Heater |
| D. | Burner |
| E. | Feed pump |
| Answer» A. Stoker | |
| 269. |
In case the characteristic impedance of the line is equal to the load impedance |
| A. | all the energy will pass to the earth |
| B. | all the energy will be lost in transmission losses |
| C. | the system will resonatc badly |
| D. | all the energy sent will be absorbed by the load |
| E. | None of the above |
| Answer» D. all the energy sent will be absorbed by the load | |
| 270. |
The specific gravity of aluminium is |
| A. | 3.71 |
| B. | 5.71 |
| C. | 1.71 |
| D. | 2.71 |
| E. | 4.71 |
| Answer» D. 2.71 | |
| 271. |
The illumination level in the houses is usually in the range |
| A. | 400 to 650 lumens/m2 |
| B. | 2500 to 3000 lumens/m2 |
| C. | 1200 to 1600 lumens/m2 |
| D. | 100 to 1400 lumens/m2 |
| E. | 10 to 20 lumens/m2 |
| Answer» D. 100 to 1400 lumens/m2 | |
| 272. |
For under water movement of a submarine the power is provided by |
| A. | Tidal energy |
| B. | Solar energy |
| C. | Thermoionic converters |
| D. | Geothermal energy |
| E. | Batteries |
| Answer» E. Batteries | |
| 273. |
For constant voltage transmission, the drop is compensated by installing |
| A. | synchronous motors |
| B. | capacitors |
| C. | inductors |
| D. | All of the above |
| E. | None of the above |
| Answer» A. synchronous motors | |
| 274. |
The total power of a wind stream is proportional to |
| A. | velocity of stream |
| B. | (velocity of stream)2 |
| C. | (velocity of stream)3 |
| E. | None of the above |
| Answer» C. (velocity of stream)3 | |
| 275. |
Which of the following is considered to be superior quality coal for power plants? |
| A. | Peat |
| B. | Bituminous coal |
| C. | Lignite |
| D. | Coke |
| E. | Pulverised coal |
| Answer» B. Bituminous coal | |
| 276. |
The string efficiency in an ac system is |
| A. | 100% |
| B. | Zero |
| C. | 50% |
| D. | 25% |
| E. | 70.70% |
| Answer» A. 100% | |
| 277. |
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» C. 75 to 80 percent of total cost | |
| 278. |
Alternating current power is transmitted at high voltages |
| A. | to safeguard against pilferage |
| B. | to minimise transmission losses |
| C. | to reduce cost of generation |
| D. | to make the system reliable |
| E. | None of the above |
| Answer» B. to minimise transmission losses | |
| 279. |
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» C. Kaplan turbine | |
| 280. |
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» D. Cannot be determined on the basis of the information provided | |
| 281. |
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» B. 0.5 W | |
| 282. |
Radio carbon has half life of |
| A. | 17 years |
| B. | 117 years |
| C. | 557 years |
| D. | 5770 years |
| E. | None of the above |
| Answer» D. 5770 years | |
| 283. |
Candela is the unit of |
| A. | Luminous flux |
| B. | Luminous intensity |
| C. | Wavelength |
| D. | Brightness |
| E. | None of the above |
| Answer» B. Luminous intensity | |
| 284. |
Direct conversion of heat into electric power is possible through |
| A. | batteries |
| B. | fuel cells |
| C. | thermionic converters |
| D. | All of the above |
| E. | None of the above |
| Answer» C. thermionic converters | |
| 285. |
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» A. cement plants | |
| 286. |
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» C. Cooking range | |
| 287. |
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» D. Diesel engine power plant | |
| 288. |
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» C. condenser | |
| 289. |
Satellites are powered by |
| A. | Batteries |
| B. | Solar cells |
| C. | Photo electric cells |
| D. | Thermo-electric generators |
| E. | Thermoionic converters |
| Answer» B. Solar cells | |
| 290. |
The unit of luminous flux is |
| A. | Steradian |
| B. | Candela |
| C. | Lumen |
| D. | Lux |
| E. | None of the above |
| Answer» C. Lumen | |
| 291. |
Out of the following system of distribution, which system offers the best economy? |
| A. | Direct current system |
| B. | AC single phase system |
| C. | AC 3 phase 3 wire system |
| D. | AC 3 phase 4 wire system |
| E. | None of the above |
| Answer» A. Direct current system | |
| 292. |
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» B. reduces earth capacitance of the lowest unit | |
| 293. |
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» B. 4 | |
| 294. |
The calorific value of lignite is expected to be around |
| A. | 10,000 kcal/kg |
| B. | 5000 kcal/kg |
| C. | 1000 kcal/kg |
| D. | 1500 kcal/kg |
| E. | 2500 kcal/kg |
| Answer» B. 5000 kcal/kg | |
| 295. |
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» D. near absolute zero | |
| 296. |
Diesel locomotives in India are manufactured at |
| A. | Varanasi |
| B. | Ajmer |
| C. | Parambur |
| D. | Chitranjan |
| E. | Bangalore |
| Answer» A. Varanasi | |
| 297. |
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» C. plant is used for standby purpose only | |
| 298. |
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» C. MHO relay | |
| 299. |
Which distribution system is more reliable? |
| A. | Ring main system |
| B. | Tree system |
| C. | Radial system |
| D. | All are equally reliable |
| E. | None of the above |
| Answer» A. Ring main system | |
| 300. |
All of the following places are associated with oil refineries EXCEPT |
| A. | Mathura |
| B. | Kanpur |
| C. | Bombay |
| D. | Koyali |
| E. | None of the above |
| Answer» B. Kanpur | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.