McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 351. |
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» B. Disc type | |
| 352. |
Gamma rays are |
| A. | high energy, short wavelength electromagnetic radiation |
| B. | high energy, long wavelength electromagnetic wavelength |
| C. | low energy, long wavelength electromagnetic radiation |
| D. | low energy, short wavelength electromagnetic radiation |
| E. | None of the above |
| Answer» A. high energy, short wavelength electromagnetic radiation | |
| 353. |
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» C. specific gravity of liquids | |
| 354. |
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» C. Income tax rules | |
| 355. |
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» E. All of the above | |
| 356. |
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» D. All of the above | |
| 357. |
If a diesel engine has a turbochanger, it can be concluded that the engine is |
| A. | Pressure lubricated |
| B. | Double acting type |
| C. | Air cooled type |
| D. | Supercharged type |
| E. | High speed type |
| Answer» D. Supercharged type | |
| 358. |
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» E. All of the above | |
| 359. |
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» D. to provide additional mechanical strength | |
| 360. |
Which of the following method can be used for heating wood? |
| A. | Oil burner heating |
| B. | Carbon arc heating |
| C. | Tungsten arc heating |
| D. | Resistance heating |
| E. | Dielectric heating |
| Answer» E. Dielectric heating | |
| 361. |
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» D. Safe tension is not exceeded | |
| 362. |
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» D. Hydro-electric power plant | |
| 363. |
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» A. 12.5 percent | |
| 364. |
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» A. Resistance | |
| 365. |
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» B. centrifugal separators | |
| 366. |
Steel poles used for telephone lines are generally |
| A. | painted |
| B. | plated |
| C. | galvanized |
| D. | blackened |
| E. | None of the above |
| Answer» C. galvanized | |
| 367. |
Raniganj is famous for |
| A. | Thorium deposits |
| B. | Oil fields |
| C. | LPG |
| D. | Coal |
| E. | None of the above |
| Answer» D. Coal | |
| 368. |
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» B. Ultimate analysis | |
| 369. |
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» B. 33 kV | |
| 370. |
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» A. at no load | |
| 371. |
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» C. Long transmission line | |
| 372. |
In a hydroelectric plant a conduit-system for taking water from the intake work to the turbine is known as |
| A. | Penstock |
| B. | Dam |
| C. | Reservoir |
| D. | Surge tank |
| E. | Flume |
| Answer» A. Penstock | |
| 373. |
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» B. 10 to 15 percent | |
| 374. |
Therm is a unit of |
| A. | radioactivity |
| B. | heating value |
| C. | wind speed |
| D. | tidal wave |
| E. | None of the above |
| Answer» B. heating value | |
| 375. |
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» D. A current limiting device | |
| 376. |
soot is virtually nothing but |
| A. | ash |
| B. | cinder |
| C. | gas |
| D. | carbon |
| E. | None of the above |
| Answer» D. carbon | |
| 377. |
Which of the following is not needed in megneto hydrodynamic power plants? |
| A. | Chimney |
| B. | Combustor |
| C. | Steam turbine |
| D. | Fuel |
| E. | None of the above |
| Answer» C. Steam turbine | |
| 378. |
A four stroke petrol engine is designed to develop 35 BHP at 200 RPM. It has an indicated mean effective pressure of 20 kg/cm2, a stroke of 35 cm and a bore diameter of 20 cm. Using this data mechanical efficiency of the engine at the running condition given would be closest to |
| A. | 50 percent |
| B. | 60 percent |
| C. | 70 percent |
| D. | 80 percent |
| E. | None of the above |
| Answer» C. 70 percent | |
| 379. |
Particles having the same atomic number but different mass unmbers are called |
| A. | Beta particles |
| B. | Positrons |
| C. | Isotopes |
| D. | Ions |
| E. | Decayed particles |
| Answer» C. Isotopes | |
| 380. |
Careful handling of fuel is essential for which of the following power plant? |
| A. | Hydro-electric power plant |
| B. | Diesel engine power plant |
| C. | Gas turbine power plant |
| D. | Steam power plant |
| E. | Nuclear power plant |
| Answer» E. Nuclear power plant | |
| 381. |
High load factor can be expected in |
| A. | power plants near load centre |
| B. | slow speed power plants |
| C. | multi-unit power plants |
| D. | base load stations |
| E. | None of the above |
| Answer» D. base load stations | |
| 382. |
Flash generally results from |
| A. | gas turbines |
| B. | diesel engines |
| C. | pulverized coal boilers |
| D. | fluidized bed boilers |
| E. | None of the above |
| Answer» C. pulverized coal boilers | |
| 383. |
A load curve helps in deciding |
| A. | size of the generating units |
| B. | total installed capacity of the plant |
| C. | operating schedule of the generating units |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 384. |
In any transmission line |
| A. | ?BC = 1 - AD |
| B. | AC - BD = -1 |
| C. | AB = CD + 1 |
| D. | AC = BD + 1 |
| E. | AB - CD = -1 |
| Answer» A. ?BC = 1 - AD | |
| 385. |
The device used to generate power utilising energy of wind is called |
| A. | Air motor |
| B. | Aerogenerator |
| C. | Windmill |
| D. | Wind generagor |
| E. | None of the above |
| Answer» C. Windmill | |
| 386. |
Pea coal is |
| A. | anthracite coal, small in size |
| B. | same as peat |
| C. | low ash content lignite |
| D. | none of the above |
| E. | None of the above |
| Answer» A. anthracite coal, small in size | |
| 387. |
Air curtains find applications in |
| A. | air conditioned spaces |
| B. | green houses |
| C. | nuclear power plants |
| D. | solar energy system |
| E. | None of the above |
| Answer» A. air conditioned spaces | |
| 388. |
A current of 10 milli-amperes through human body |
| A. | will cause mild sensation |
| B. | will affect muscle control |
| C. | will affect breathing |
| D. | will cause death |
| E. | None of the above |
| Answer» A. will cause mild sensation | |
| 389. |
A curve showing the variation of load on a power station with respect to time is known as |
| A. | Flow chart |
| B. | Performance curve |
| C. | Load curve |
| D. | Diversity factor |
| E. | Load duration curve |
| Answer» C. Load curve | |
| 390. |
Nagarjunsagar dam has been constructed on river |
| A. | Kali |
| B. | Krishna |
| C. | Kaveri |
| D. | Charnbal |
| E. | Mahanadi |
| Answer» B. Krishna | |
| 391. |
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» B. Hydro-electric power plant | |
| 392. |
In petrothermal systems of geothermal energy there is hot dry rock but no underground water. In such systems energy is obtained by |
| A. | circulating compressed air |
| B. | pumping water |
| C. | creating water wells |
| D. | None of the above |
| E. | None of the above |
| Answer» B. pumping water | |
| 393. |
A fast breeder reactor |
| A. | operates with fast neutrons and produces less fissionable material than it consumes |
| B. | operates with fast neutrons and produces more fissionable material than it consumes |
| C. | operates with slow neutrons and produces less fissionable material than it consumes |
| D. | operates with slow neutrons and produces more fissionable material than it consumes |
| E. | None of the above |
| Answer» B. operates with fast neutrons and produces more fissionable material than it consumes | |
| 394. |
The current down by the transmission line due to corona losses is |
| A. | sinusoidal |
| B. | square |
| C. | non-sinusoidal |
| E. | None of the above |
| Answer» C. non-sinusoidal | |
| 395. |
In a transmission line following are the distributed parameters |
| A. | resistance and inductance only |
| B. | resistance, inductance and capacitance |
| C. | resistance, inductance, capacitance and short conductance |
| E. | None of the above |
| Answer» C. resistance, inductance, capacitance and short conductance | |
| 396. |
The effect of ice deposition on conductor is |
| A. | increased skin effect |
| B. | reduced corona losses |
| C. | increased weight |
| D. | reduced sag |
| E. | None of the above |
| Answer» C. increased weight | |
| 397. |
Illumination due to moonlight is nearly |
| A. | 18 lumens/meter2 |
| B. | 300 lumens/meter2 |
| C. | 0.3 lumen/meter2 |
| D. | 1.8 lumens/meter2 |
| E. | 30 lumens/meter2 |
| Answer» C. 0.3 lumen/meter2 | |
| 398. |
Which of the following place is not associated with hydro-electric power plants? |
| A. | Bhakra |
| B. | Farakka |
| C. | Koyana |
| D. | Singrauli |
| E. | Nagarjunsagar |
| Answer» D. Singrauli | |
| 399. |
The speed of the primemover is controlled by |
| A. | cam shaft |
| B. | feed pump |
| C. | regulator |
| D. | governor |
| E. | None of the above |
| Answer» D. governor | |
| 400. |
The expected life of wooden pols for transmission line is |
| A. | 30 to 60 years |
| B. | 20 to 25 years |
| C. | 5 to 8 years |
| D. | 1 to 2 years |
| E. | 2 to 5 years |
| Answer» B. 20 to 25 years | |
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