McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 401. |
Solar cells are made of |
| A. | Sulphur |
| B. | Silica |
| C. | Antimony |
| D. | Steel |
| E. | Phosphorous |
| Answer» B. Silica | |
| 402. |
A tidal power plant is being installed in India near |
| A. | Goa |
| B. | Gulf of Cambay |
| C. | Bay of Bengal |
| D. | Cochin |
| E. | Vishakhapatnam |
| Answer» B. Gulf of Cambay | |
| 403. |
In case the height of transmission towers is increased |
| A. | the line capacitance and inductance will not change |
| B. | the line capacitance will increase but line inductance will increase |
| C. | the line capacitance will decrease and line inductance will increase |
| D. | the line capacitance will decrease but line inductance will remain unaltered |
| E. | None of the above |
| Answer» D. the line capacitance will decrease but line inductance will remain unaltered | |
| 404. |
Parr's classification of coal is based on |
| A. | proximate analysis |
| B. | ultimate analysis |
| C. | orsat analysis |
| D. | none of above |
| E. | None of the above |
| Answer» A. proximate analysis | |
| 405. |
Water is fed to the boiler at |
| A. | At 100 kg/cm2 |
| B. | At pressure more than the steam pressure |
| C. | Less than atmospheric pressure |
| D. | Atmospheric pressure |
| E. | Slightly more than atmospheric pressure |
| Answer» B. At pressure more than the steam pressure | |
| 406. |
Which of the following location is not associated with super-thermal power plant? |
| A. | Korba |
| B. | Badarpur |
| C. | Farakka |
| D. | Rehand |
| E. | None of the above |
| Answer» B. Badarpur | |
| 407. |
Phase, advancers for power factor improvement are generally used for |
| A. | Induction motors below 200 HP |
| B. | Induction motors below 10 HP |
| C. | Induction motors below 100 HP |
| D. | Are lamps of high wattage |
| E. | Transformers of 100 MVA and above |
| Answer» A. Induction motors below 200 HP | |
| 408. |
The pressure of steam used in modern thermal power plants is upto |
| A. | 100 kg/cm2 |
| B. | 15 kg/cm2 |
| C. | 250 kg/cm2 |
| D. | 350 kg/cm2 |
| E. | 170 kg/cm2 |
| Answer» E. 170 kg/cm2 | |
| 409. |
In transmission system a feeder feeds power to |
| A. | service mains |
| B. | generating stations |
| C. | distributors |
| D. | All of the above |
| E. | None of the above |
| Answer» C. distributors | |
| 410. |
The average pH of the normal rainfall is usually |
| A. | neutral |
| B. | slightly acidic |
| C. | slightly alkaline |
| E. | None of the above |
| Answer» B. slightly acidic | |
| 411. |
Sodium sulphur batteries use electrolyte consisting of |
| A. | solid aluminium oxide |
| B. | dilute sulphuric acid |
| C. | brine |
| D. | KOH |
| E. | None of the above |
| Answer» B. dilute sulphuric acid | |
| 412. |
Corona generally results in |
| A. | Violet glow |
| B. | Hissing noise |
| C. | Production of ozone gas |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 413. |
Natural gas is obtained |
| A. | as by-product from blast furnace |
| B. | as by-product from petroleum refining |
| C. | from earth's surface usually along with crude |
| D. | from ammonia |
| E. | None of the above |
| Answer» C. from earth's surface usually along with crude | |
| 414. |
Which of the following cannot be the prime-mover for a generator of 120 MW capacity? |
| A. | Steam turbine |
| B. | Gas turbine |
| C. | Kaplan turbine |
| D. | Diesel engine |
| E. | None of the above |
| Answer» D. Diesel engine | |
| 415. |
Which of the following will need highest level of illumination? |
| A. | Railway platforms |
| B. | Foyer for cinema halls |
| C. | Bed rooms |
| D. | Hospital wards |
| E. | Proof reading |
| Answer» E. Proof reading | |
| 416. |
Quad is a mesure of |
| A. | photosynthesis |
| B. | wind power |
| C. | radioactive decay |
| D. | energy |
| E. | None of the above |
| Answer» D. energy | |
| 417. |
A Buchholz relay is used on |
| A. | Transformer |
| B. | Generators |
| C. | Transmission lines |
| D. | Cables |
| E. | All of the above |
| Answer» A. Transformer | |
| 418. |
The supply and distribution of electrical energy in states is controlled by |
| A. | NTPC |
| B. | Electricity Board |
| C. | BHEL |
| D. | Department of Industries |
| E. | Department of Science and Technology |
| Answer» B. Electricity Board | |
| 419. |
Pyrhelicometer measures |
| A. | intensity of direct solar radiation |
| B. | wind speed at an elevation |
| C. | fission caused by thermal reutrons |
| D. | total electromagnetic radiation cmitted by the sun |
| E. | None of the above |
| Answer» A. intensity of direct solar radiation | |
| 420. |
In any transmission line, the dimensions of constants B and C are |
| A. | ohm and ohm |
| B. | ohm and mho |
| C. | mho and ohm |
| D. | mho and mho |
| E. | None of the above |
| Answer» B. ohm and mho | |
| 421. |
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» A. Tension in the line decreases | |
| 422. |
As compared to copper, the conductivity of aluminium is nearly |
| A. | 85% |
| B. | 60% |
| C. | 40% |
| D. | 80% |
| E. | 20% |
| Answer» B. 60% | |
| 423. |
The equipment used for pulverising is known as |
| A. | Stoker |
| B. | Ball mill |
| C. | Burner |
| D. | Coke oven |
| E. | Hopper |
| Answer» B. Ball mill | |
| 424. |
The dimensions of generalised constants A and D are |
| A. | ohms and mhos |
| B. | mhos and ohms |
| C. | mhos and mhos |
| D. | Both are dimensionless |
| E. | ohms and ohms |
| Answer» D. Both are dimensionless | |
| 425. |
In a fuel cell positive electrode is of |
| A. | oxygen |
| B. | hydrogen |
| C. | ammonia |
| D. | carbon monoxide |
| E. | None of the above |
| Answer» A. oxygen | |
| 426. |
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» D. Earth conductor | |
| 427. |
A sodium graphite reactor uses |
| A. | sodium as moderator and graphite as coolant |
| B. | sodium as coolant and graphite as moderator |
| C. | a mixture of sodium and graphite as coolant |
| D. | a mixture of sodium and graphite as moderator |
| E. | None of the above |
| Answer» B. sodium as coolant and graphite as moderator | |
| 428. |
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» D. Any of the above | |
| 429. |
Ekman spiral is an idealized mathematical description of |
| A. | ocean temperature gradient |
| B. | wind distribution in the planetary boundary layer |
| C. | carbon dioxide percentage variation with elevation |
| D. | radioactive decay of materials |
| E. | None of the above |
| Answer» B. wind distribution in the planetary boundary layer | |
| 430. |
In order to reduce skin effect at UHF |
| A. | conductors are painted |
| B. | conductors are anodised |
| C. | copper tubes with silver plating are used |
| D. | copper rods with silver plating are used |
| E. | None of the above |
| Answer» C. copper tubes with silver plating are used | |
| 431. |
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» B. transition temperature | |
| 432. |
Which of the following material has high scrap value as compared to initial cost? |
| A. | Copper |
| B. | Aluminium |
| C. | Steel |
| D. | Cast iron |
| E. | Wood |
| Answer» A. Copper | |
| 433. |
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» D. Hydro-electric power plant | |
| 434. |
In which power plant chimney is not needed? |
| A. | Gas turbine power plant |
| B. | Steam power plant |
| C. | Hydro-electric power plant |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Hydro-electric power plant | |
| 435. |
Attemperation is |
| A. | the process of reducing pollution through stack gases |
| B. | the process of energy conservation by the use of economiser, etc. |
| C. | preheating of water before admission to boiler |
| D. | the reduction of steam temperature |
| E. | None of the above |
| Answer» D. the reduction of steam temperature | |
| 436. |
In ACSR conductors |
| A. | varnish is the insulation used |
| B. | bitumen is the insulation between aluminium and steel |
| C. | no insulation is used between aluminium and steel |
| D. | air acts as insulation medium between aluminium and steel |
| E. | None of the above |
| Answer» C. no insulation is used between aluminium and steel | |
| 437. |
The standard frequency of electric power supply in India is |
| A. | 440 Hz |
| B. | 50 Hz |
| C. | 1 Hz |
| D. | 60 Hz |
| E. | 220 Hz |
| Answer» B. 50 Hz | |
| 438. |
HBJ pipeline orginates from |
| A. | Gujarat and ends in Bihar |
| B. | Maharashtra and ends in Uttar Pradesh |
| C. | Maharashtra and ends in Bihar |
| D. | Gujarat and ends in Uttar Pradesh |
| E. | None of the above |
| Answer» D. Gujarat and ends in Uttar Pradesh | |
| 439. |
Which authority is directly concerned with generation and distribution of electricity? |
| A. | Electricity Authority of India |
| B. | Department of Science and Technology |
| C. | Ministry of Power |
| D. | State Electricity Boards |
| E. | None of the above |
| Answer» D. State Electricity Boards | |
| 440. |
An air preheater is an essential part of which of the following power plant? |
| A. | Hydro-electric power plant |
| B. | Nuclear power plant |
| C. | Gas turbine power plant |
| D. | Steam power plant |
| E. | Diesel engine power plant |
| Answer» D. Steam power plant | |
| 441. |
The compressor used in gas turbine is usually |
| A. | Lobe type compressor |
| B. | Multistage axial flow compressor |
| C. | Multistage reciprocating compressor |
| D. | Single stage reciprocating compressor |
| E. | Screw compressor |
| Answer» B. Multistage axial flow compressor | |
| 442. |
Hot template curves are the plot of |
| A. | conductor sags and span lengths |
| B. | temperature and ground clearance |
| C. | temperature and humidity |
| D. | conductor weight and sag |
| E. | None of the above |
| Answer» A. conductor sags and span lengths | |
| 443. |
In a steam locomotive the power is generated in |
| A. | Double acting non-condensing steam engine |
| B. | Single acting condensing steam engine |
| C. | Single acting non-condensing steam engine |
| D. | Double acting condensing steam engine |
| E. | Steam turbine |
| Answer» A. Double acting non-condensing steam engine | |
| 444. |
Which of the following domestic utility item consumes least power? |
| A. | Electric iron |
| B. | Toaster |
| C. | Electric shaver |
| D. | Desert cooler |
| E. | Heat convector |
| Answer» C. Electric shaver | |
| 445. |
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» B. potential energy of water | |
| 446. |
The carbon percentage in diesel oil is nearly |
| A. | 52% |
| B. | 74% |
| C. | 66% |
| D. | 86% |
| E. | 100% |
| Answer» D. 86% | |
| 447. |
Gas turbines are widely used in |
| A. | Power generation |
| B. | Pumping stations |
| C. | Aircraft |
| D. | Ship |
| E. | Locomotive |
| Answer» C. Aircraft | |
| 448. |
The alternators for a steam power plant usually run at |
| A. | 1200 rpm |
| B. | 3000 rpm |
| C. | 1500 rpm |
| D. | 750 rpm |
| E. | 30,000 rpm |
| Answer» B. 3000 rpm | |
| 449. |
When a conductor is suspended between two supports at the same level it taken the shape of |
| A. | Cycloid |
| B. | Epicycloid |
| C. | Parabola |
| D. | Semi-circle |
| E. | Catenary |
| Answer» E. Catenary | |
| 450. |
A 660 V cable is known as |
| A. | Extra super voltage cable |
| B. | High tension cable |
| C. | Super tension cable |
| D. | Extra high tension cable |
| E. | Low tension cable |
| Answer» E. Low tension cable | |
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