McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 451. |
Which of the following public sector unit is engaged in the manufacture of thermal power plants? |
| A. | National Thermal Power Corporation Ltd |
| B. | Department of science and technology |
| C. | Bharat Heavy Electricals Ltd |
| D. | Heavy Engineering Corporation Ltd |
| E. | Coal India Ltd |
| Answer» C. Bharat Heavy Electricals Ltd | |
| 452. |
In a long transmission line, the effect of |
| A. | resistance, capacitance and inductance is neglected |
| B. | resistance and inductance is taken into account but effect of capacitance is neglected |
| C. | capacitance and inductance is taken into account but effect of resistance is neglected |
| D. | resistance, capacitance and inductance is taken into account |
| E. | resistance and capacitance is taken into account but effect of inductance is neglected |
| Answer» D. resistance, capacitance and inductance is taken into account | |
| 453. |
Which of the following power plant will give least running cost of the production of electrical power? |
| A. | All will have nearly same running cost |
| B. | Nuclear power plant |
| C. | Gas turbine power plant |
| D. | Diesel engine power plant |
| E. | Steam power plant |
| Answer» B. Nuclear power plant | |
| 454. |
In a steam turbine cycle the lowest pressure occurs in |
| A. | Super-heater exit |
| B. | Boiler |
| C. | Condenser |
| D. | Super-heater |
| E. | Turbine inlet |
| Answer» C. Condenser | |
| 455. |
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. | 2 K |
| B. | 5 K |
| C. | 1.25 K |
| D. | 0.25 K |
| E. | 0.3125 K |
| Answer» E. 0.3125 K | |
| 456. |
One BTU is the amount of energy required to raise the temperature of |
| A. | One gram of water through 1?C |
| B. | One pound of water through 1?C |
| C. | One gram of water through 1?F |
| D. | One pound of water through 1?F |
| E. | One kilogram of water through ?F |
| Answer» D. One pound of water through 1?F | |
| 457. |
Which of the following material has the best conductivity? |
| A. | ACSR |
| B. | 5.71 |
| C. | Cadmium copper |
| D. | Copper |
| E. | Aluminium |
| Answer» D. Copper | |
| 458. |
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» E. 75% | |
| 459. |
The capacity of generators being installed in super-thermal power plant is |
| A. | 200 MW |
| B. | 400 MW |
| C. | 100 MW |
| D. | 500 MW |
| E. | 220 MW |
| Answer» D. 500 MW | |
| 460. |
Which of the following power plant can be installed within the shortest possible time? |
| A. | Steam power plant |
| B. | Diesel engine power plant |
| C. | Hydro-electric power plant |
| D. | Gas turbine power plant |
| E. | Nuclear power plant |
| Answer» B. Diesel engine power plant | |
| 461. |
Which of the following is not the standard rating of GLS lamps in India? |
| A. | 50 W |
| B. | 60 W |
| C. | 40 W |
| D. | 100 W |
| E. | 25 W |
| Answer» A. 50 W | |
| 462. |
Which of the following place is associated with thermal power plants? |
| A. | Agra |
| B. | Tarapur |
| C. | Bhakra |
| D. | Obra |
| E. | DVC |
| Answer» D. Obra | |
| 463. |
In a medium transmission line the effect of |
| A. | resistance and inductance is negligible but effect of capacitance is taken into account |
| B. | capacitance is negligible |
| C. | resistance, capacitance and inductance is taken into account |
| D. | resistance is negligible |
| E. | inductance is negligible |
| Answer» C. resistance, capacitance and inductance is taken into account | |
| 464. |
The calorific value of natural gas is expected to be around |
| A. | 2000 kcal/m3 |
| B. | 1500 kcal/m3 |
| C. | 25000 kcal/m3 |
| D. | 500 kcal/m3 |
| E. | 2500 kcal/m3 |
| Answer» D. 500 kcal/m3 | |
| 465. |
The name DVC is associated with which type of power generation? |
| A. | Nuclear |
| B. | Hydro-electric |
| C. | Thermal |
| D. | Gas turbine |
| E. | Diesel engine |
| Answer» B. Hydro-electric | |
| 466. |
Which of the following gas is sometimes filled in filament lamps? |
| A. | Argon |
| B. | Ozone |
| C. | Helium |
| D. | Hydrogen |
| E. | Oxygen |
| Answer» A. Argon | |
| 467. |
The heating value of coal largely depends on |
| A. | Volatile matter |
| B. | Carbon content |
| C. | Size of coal particles |
| D. | Moisture content |
| E. | Sulphur content |
| Answer» B. Carbon content | |
| 468. |
Pulverised coal is |
| A. | Coal free from as content |
| B. | Coal which burns for long time |
| C. | Coal free from sulphur |
| D. | Coal broken into fine pieces |
| E. | Non-smoking coal |
| Answer» D. Coal broken into fine pieces | |
| 469. |
The calorific value of diesel oil is expected to be around |
| A. | 1000 kcal/kg |
| B. | 16000 kcal/kg |
| C. | 21000 kcal/kg |
| D. | 11000 kcal/kg |
| E. | 5000 kcal/kg |
| Answer» D. 11000 kcal/kg | |
| 470. |
The highest voltage at which the power is transmitted in India is |
| A. | 400 kV |
| B. | 66 kV |
| C. | 33 kV |
| D. | 220 kV |
| E. | 132 kV |
| Answer» A. 400 kV | |
| 471. |
In any transmission line, which two generalised constants are equal? |
| A. | C and D |
| B. | B and C |
| C. | A and B |
| D. | A and C |
| E. | A and D |
| Answer» E. A and D | |
| 472. |
The power factor of a 3 phase induction motor near full load is expected to be around |
| A. | 0.8 lagging |
| B. | 0.8 leading |
| C. | 0.5 lagging |
| D. | 0.5 leading |
| E. | 0.1 lagging |
| Answer» A. 0.8 lagging | |
| 473. |
If an engine has spark plugs, it can be safely concluded that it is |
| A. | a four stroke engine |
| B. | a air cooled engine |
| C. | a water cooled engine |
| D. | a two stroke engine |
| E. | not a diesel engine |
| Answer» E. not a diesel engine | |
| 474. |
The work of installation and commissioning of power plants in India is generally undertaken by |
| A. | NTPC Ltd. |
| B. | Coal Authority of India |
| C. | Steel Authority of India |
| D. | NHPC Ltd |
| E. | HAL |
| Answer» A. NTPC Ltd. | |
| 475. |
When the reactive component is small |
| A. | the phase angle will be small and p.f. will be high |
| B. | the phase angle will be large and p.f. will be low |
| C. | the phase angle will be small and p.f. will be unity |
| D. | the phase angle will be large and p.f. will be high |
| E. | the phase angle will be small and p.f. will be leading |
| Answer» A. the phase angle will be small and p.f. will be high | |
| 476. |
The specific gravity of copper is |
| A. | 8.9 |
| B. | 5.9 |
| C. | 13.9 |
| D. | 16.9 |
| E. | 2.9 |
| Answer» B. 5.9 | |
| 477. |
A pin type insulator is generally used upto |
| A. | 11 kV |
| B. | 132 kV |
| C. | 66 kV |
| D. | 33 kV |
| E. | 1.1 kV |
| Answer» D. 33 kV | |
| 478. |
A 66 kV transmission line carrying power to a distance of 120 kilometre will be termed as |
| A. | Very short transmission line |
| B. | Long transmission line |
| C. | Medium transmission line |
| D. | Tiny transmission line |
| E. | Short transmission line |
| Answer» C. Medium transmission line | |
| 479. |
Maximum horse power of a steam locomotive is |
| A. | 2500 |
| B. | 100 |
| C. | 1500 |
| D. | 5000 |
| E. | 500 |
| Answer» C. 1500 | |
| 480. |
Pressure cables are used for |
| A. | Low power factors |
| B. | Higher voltages |
| C. | High kW |
| D. | High KVA |
| E. | High current ratings |
| Answer» B. Higher voltages | |
| 481. |
Diesel engine fuels are rated by |
| A. | Cetane number |
| B. | HUCR |
| C. | Octane number |
| D. | CFR number |
| E. | Calorific value |
| Answer» A. Cetane number | |
| 482. |
The wavelength of green colour is nearly |
| A. | 4000 A |
| B. | 5500 A |
| C. | 2500 A |
| D. | 7500 A |
| E. | 1000 A |
| Answer» B. 5500 A | |
| 483. |
The average load factor of thermal power plants in India is |
| A. | 35 to 40% |
| B. | 50 to 60% |
| C. | 80 to 95% |
| D. | 100% |
| E. | 20 to 30% |
| Answer» B. 50 to 60% | |
| 484. |
A ship is powered by |
| A. | Diesel turbine |
| B. | Steam turbines, diesel engines, hydraulic turbines or nuclear reactors |
| C. | Steam turbines, diesel engines hydraulic turbines |
| D. | Steam turbine |
| E. | Steam turbines or diesel engines |
| Answer» E. Steam turbines or diesel engines | |
| 485. |
A gas turbine works on |
| A. | Brayton cycle |
| B. | Regenerative cycle |
| C. | Carnot cycle |
| D. | Rankine cycle |
| E. | Dual cycle |
| Answer» A. Brayton cycle | |
| 486. |
The live storage of coal in power plant means |
| A. | Coal ready for combustion |
| B. | Preheated coal |
| C. | Coal in transit |
| D. | Purified coal |
| E. | Storage of coal sufficient to meet hour demand for the plant. |
| Answer» E. Storage of coal sufficient to meet hour demand for the plant. | |
| 487. |
The maximum number of generators in a power plant must be |
| A. | One |
| B. | Even |
| C. | Two |
| D. | Odd |
| E. | Three |
| Answer» C. Two | |
| 488. |
The area under the load curve represents |
| A. | Average demand |
| B. | Maximum demand |
| C. | System voltage |
| D. | Energy consumed |
| E. | Current |
| Answer» D. Energy consumed | |
| 489. |
Out of the following which one is not a unconventional source of energy? |
| A. | Geothermal energy |
| B. | Tidal power |
| C. | Wind power |
| D. | Nuclear energy |
| E. | Magneto hydrodynamic generator |
| Answer» D. Nuclear energy | |
| 490. |
In which of the following state manufacturing unit of M/S Bharat Heavy Electricals Ltd. Is not located? |
| A. | Rajasthan |
| B. | Andhra Pardesh |
| C. | U.P. |
| D. | Karnataka |
| E. | M.P. |
| Answer» A. Rajasthan | |
| 491. |
The value of an equipment at the end of its useful life is known as |
| A. | Scrap value |
| B. | Obsolescence value |
| C. | Demand value |
| D. | Useful value |
| E. | Replacement value |
| Answer» A. Scrap value | |
| 492. |
Which of the following will need the lower level of illumination? |
| A. | Hospital wards |
| B. | Display |
| C. | Railway platform |
| D. | Auditoriums |
| E. | Green rooms |
| Answer» C. Railway platform | |
| 493. |
The calorific value of coal gas is expected to be around |
| A. | 500 kcal/m3 |
| B. | 1500 kcal/m3 |
| C. | 2500 kcal/m3 |
| D. | 7500 kcal/m3 |
| E. | 5000 kcal/m3 |
| Answer» D. 7500 kcal/m3 | |
| 494. |
A jet aircraft is powered by |
| A. | Gas turbine |
| B. | Solar cells |
| C. | Batteries |
| D. | Petrol engines |
| E. | Diesel engines |
| Answer» A. Gas turbine | |
| 495. |
One calorie is the same as |
| A. | 4.18 joules |
| B. | 1 dyne-sec |
| C. | 1 watt |
| D. | 1 dyne |
| E. | 4.11 watts |
| Answer» A. 4.18 joules | |
| 496. |
Death is almost certain when the current through human body is |
| A. | 100 milli-amperes |
| B. | 100 micro-amperes |
| C. | 10 micro-amperes |
| D. | 10 milli-amperes |
| E. | 25 micro-amperes |
| Answer» A. 100 milli-amperes | |
| 497. |
Standby losses are least in case of |
| A. | Steam power plant |
| B. | Nuclear power plant |
| C. | Diesel engine power plant |
| D. | Hydro-electric power plant |
| E. | Gas turbine power plant |
| Answer» D. Hydro-electric power plant | |
| 498. |
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» D. 15 kg | |
| 499. |
Which of the following variety of coal will have highest ash content |
| A. | Bengal coal |
| B. | Bituminous coal |
| C. | Grade I steam coal |
| D. | Lignite |
| E. | Coking coal |
| Answer» D. Lignite | |
| 500. |
Highly skilled manpower is needed for the maintendance of which of the following power plants? |
| A. | Nuclear power plant |
| B. | Gas turbine power plant |
| C. | Hydro-electric power plant |
| D. | Steam power plant |
| E. | Diesel engine power plant |
| Answer» A. Nuclear power plant | |
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