McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 551. |
The expected life of a GLS lamp is nearly |
| A. | 50 hours |
| B. | 10,000 hours |
| C. | 100 hours |
| D. | 1000 hours |
| E. | 5000 hours |
| Answer» D. 1000 hours | |
| 552. |
The thickness of the layer of insulation on a cable depends on |
| A. | kW |
| B. | KVA |
| C. | Voltage |
| D. | Current carrying capacity of conductor |
| E. | Power factor |
| Answer» C. Voltage | |
| 553. |
Coal used in power plants is also known as |
| A. | Charcoal |
| B. | Soft coal |
| C. | Coke |
| D. | Steam coal |
| E. | Power coal |
| Answer» D. Steam coal | |
| 554. |
High horse power diesel engines are usually started by |
| A. | Batteries |
| B. | Compressed air |
| C. | Self-starter or cranking |
| D. | Cranking |
| E. | Self-starter |
| Answer» B. Compressed air | |
| 555. |
Which of the following motor can operate on lagging as well as leading power factor? |
| A. | Squirrel cage induction motor |
| B. | Universal motor |
| C. | Capacitor run motor |
| D. | Synchronous motor |
| E. | Reluctance motor |
| Answer» D. Synchronous motor | |
| 556. |
A 200 MW generator will invariably be |
| A. | Nitrogen cooled |
| B. | Hydrogen cooled |
| C. | Pressurised air cooled |
| D. | Oxygen cooled |
| E. | Air cooled |
| Answer» B. Hydrogen cooled | |
| 557. |
Which of the following place is not associated with nuclear power plants? |
| A. | Tarapur |
| B. | Bangalore |
| C. | Kamalappakam |
| D. | Narora |
| E. | Kora |
| Answer» B. Bangalore | |
| 558. |
The term 'critical' is associated with which type of power plant? |
| A. | Hydro-electric power plant |
| B. | Nuclear power plant |
| C. | Steam power plant |
| D. | Gas turbine power plant |
| E. | Diesel engine power plant |
| Answer» B. Nuclear power plant | |
| 559. |
The standard wattage of 4 feet fluorescent tube is |
| A. | 10 W |
| B. | 100 W |
| C. | 250 W |
| D. | 500 W |
| E. | 40 W |
| Answer» E. 40 W | |
| 560. |
For the same wattage, which of the following lamp is cheapest? |
| A. | Mercury vapour lamp |
| B. | Fluorescent tube 4 ft. |
| C. | Fluorescent tube 2 ft. |
| D. | GLS lamp |
| E. | Sodium vapour lamp |
| Answer» D. GLS lamp | |
| 561. |
One British thermal unit (BTU) is nearly equal to |
| A. | 1053 joules |
| B. | 243 joules |
| C. | 2106 joules |
| D. | 252 joules |
| E. | 504 joules |
| Answer» A. 1053 joules | |
| 562. |
At which of a following speed the generators for 3 phase, 50 Hz supply will not run? |
| A. | 166? rpm |
| B. | 250 rpm |
| C. | 750 rpm |
| D. | 1200 rpm |
| E. | 500 rpm |
| Answer» D. 1200 rpm | |
| 563. |
The specific gravity of diesel oil is closer to |
| A. | 1.35 |
| B. | 0.84 |
| C. | 1 |
| D. | 0.35 |
| E. | 2.7 |
| Answer» B. 0.84 | |
| 564. |
If a diesel engine has a turbochanger, it can be concluded that the engine is |
| A. | Supercharged type |
| B. | Air cooled type |
| C. | Double acting type |
| D. | Pressure lubricated |
| E. | High speed type |
| Answer» A. Supercharged type | |
| 565. |
Which of the following method can be used for heating wood? |
| A. | Oil burner heating |
| B. | Tungsten arc heating |
| C. | Resistance heating |
| D. | Dielectric heating |
| E. | Carbon arc heating |
| Answer» D. Dielectric heating | |
| 566. |
In a hydroelectric plant a conduit-system for taking water from the intake work to the turbine is known as |
| A. | Reservoir |
| B. | Flume |
| C. | Dam |
| D. | Surge tank |
| E. | Penstock |
| Answer» E. Penstock | |
| 567. |
Particles having the same atomic number but different mass unmbers are called |
| A. | Ions |
| B. | Positrons |
| C. | Isotopes |
| D. | Decayed particles |
| E. | Beta particles |
| Answer» C. Isotopes | |
| 568. |
Careful handling of fuel is essential for which of the following power plant? |
| A. | Gas turbine power plant |
| B. | Steam power plant |
| C. | Diesel engine power plant |
| D. | Nuclear power plant |
| E. | Hydro-electric power plant |
| Answer» D. Nuclear power plant | |
| 569. |
In any transmission line |
| A. | AC - BD = -1 |
| B. | AC = BD + 1 |
| C. | AB - CD = -1 |
| D. | AB = CD + 1 |
| E. | ?BC = 1 - AD |
| Answer» E. ?BC = 1 - AD | |
| 570. |
A curve showing the variation of load on a power station with respect to time is known as |
| A. | Load curve |
| B. | Flow chart |
| C. | Performance curve |
| D. | Load duration curve |
| E. | Diversity factor |
| Answer» A. Load curve | |
| 571. |
Nagarjunsagar dam has been constructed on river |
| A. | Charnbal |
| B. | Krishna |
| C. | Kali |
| D. | Mahanadi |
| E. | Kaveri |
| Answer» B. Krishna | |
| 572. |
The location of which power plant is mainly decided by the geographical factors? |
| A. | Diesel engine power plant |
| B. | Nuclear power plant |
| C. | Gas turbine power plant |
| D. | Hydro-electric power plant |
| E. | Steam power plant |
| Answer» D. Hydro-electric power plant | |
| 573. |
Illumination due to moonlight is nearly |
| A. | 1.8 lumens/meter2 |
| B. | 0.3 lumen/meter2 |
| C. | 18 lumens/meter2 |
| D. | 300 lumens/meter2 |
| E. | 30 lumens/meter2 |
| Answer» B. 0.3 lumen/meter2 | |
| 574. |
Which of the following place is not associated with hydro-electric power plants? |
| A. | Farakka |
| B. | Singrauli |
| C. | Koyana |
| D. | Bhakra |
| E. | Nagarjunsagar |
| Answer» B. Singrauli | |
| 575. |
The expected life of wooden pols for transmission line is |
| A. | 5 to 8 years |
| B. | 1 to 2 years |
| C. | 2 to 5 years |
| D. | 20 to 25 years |
| E. | 30 to 60 years |
| Answer» D. 20 to 25 years | |
| 576. |
Solar cells are made of |
| A. | Antimony |
| B. | Phosphorous |
| C. | Silica |
| D. | Sulphur |
| E. | Steel |
| Answer» C. Silica | |
| 577. |
A tidal power plant is being installed in India near |
| A. | Bay of Bengal |
| B. | Vishakhapatnam |
| C. | Gulf of Cambay |
| D. | Goa |
| E. | Cochin |
| Answer» C. Gulf of Cambay | |
| 578. |
Water is fed to the boiler at |
| A. | Atmospheric pressure |
| B. | At 100 kg/cm2 |
| C. | Less than atmospheric pressure |
| D. | Slightly more than atmospheric pressure |
| E. | At pressure more than the steam pressure |
| Answer» E. At pressure more than the steam pressure | |
| 579. |
Phase, advancers for power factor improvement are generally used for |
| A. | Induction motors below 200 HP |
| B. | Are lamps of high wattage |
| C. | Transformers of 100 MVA and above |
| D. | Induction motors below 10 HP |
| E. | Induction motors below 100 HP |
| Answer» A. Induction motors below 200 HP | |
| 580. |
The pressure of steam used in modern thermal power plants is upto |
| A. | 100 kg/cm2 |
| B. | 250 kg/cm2 |
| C. | 350 kg/cm2 |
| D. | 170 kg/cm2 |
| E. | 15 kg/cm2 |
| Answer» D. 170 kg/cm2 | |
| 581. |
The supply and distribution of electrical energy in states is controlled by |
| A. | Department of Science and Technology |
| B. | NTPC |
| C. | Electricity Board |
| D. | Department of Industries |
| E. | BHEL |
| Answer» C. Electricity Board | |
| 582. |
As compared to copper, the conductivity of aluminium is nearly |
| A. | 60% |
| B. | 40% |
| C. | 80% |
| D. | 20% |
| E. | 85% |
| Answer» A. 60% | |
| 583. |
The equipment used for pulverising is known as |
| A. | Ball mill |
| B. | Hopper |
| C. | Coke oven |
| D. | Stoker |
| E. | Burner |
| Answer» A. Ball mill | |
| 584. |
The dimensions of generalised constants A and D are |
| A. | ohms and ohms |
| B. | mhos and ohms |
| C. | mhos and mhos |
| D. | ohms and mhos |
| E. | Both are dimensionless |
| Answer» E. Both are dimensionless | |
| 585. |
Which of the following material has high scrap value as compared to initial cost? |
| A. | Cast iron |
| B. | Copper |
| C. | Aluminium |
| D. | Steel |
| E. | Wood |
| Answer» B. Copper | |
| 586. |
Which plant has least pollution problem? |
| A. | Nuclear power plant |
| B. | Hydro-electric power plant |
| C. | Steam power plant |
| D. | Diesel engine power plant |
| E. | Gas turbine power plant |
| Answer» B. Hydro-electric power plant | |
| 587. |
The standard frequency of electric power supply in India is |
| A. | 1 Hz |
| B. | 50 Hz |
| C. | 220 Hz |
| D. | 440 Hz |
| E. | 60 Hz |
| Answer» B. 50 Hz | |
| 588. |
An air preheater is an essential part of which of the following power plant? |
| A. | Steam power plant |
| B. | Hydro-electric power plant |
| C. | Gas turbine power plant |
| D. | Diesel engine power plant |
| E. | Nuclear power plant |
| Answer» A. Steam power plant | |
| 589. |
The compressor used in gas turbine is usually |
| A. | Lobe type compressor |
| B. | Multistage axial flow compressor |
| C. | Screw compressor |
| D. | Multistage reciprocating compressor |
| E. | Single stage reciprocating compressor |
| Answer» B. Multistage axial flow compressor | |
| 590. |
In a steam locomotive the power is generated in |
| A. | Steam turbine |
| B. | Single acting condensing steam engine |
| C. | Double acting condensing steam engine |
| D. | Double acting non-condensing steam engine |
| E. | Single acting non-condensing steam engine |
| Answer» D. Double acting non-condensing steam engine | |
| 591. |
Which of the following domestic utility item consumes least power? |
| A. | Heat convector |
| B. | Electric shaver |
| C. | Electric iron |
| D. | Desert cooler |
| E. | Toaster |
| Answer» B. Electric shaver | |
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