McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 1. |
The carbon percentage in diesel oil is nearly |
| A. | 52% |
| B. | 66% |
| C. | 100% |
| D. | 86% |
| E. | 74% |
| Answer» D. 86% | |
| 2. |
Which of the following power plant can be easily started from cold conditions? |
| A. | Nuclear power plant |
| B. | Thermal power plant |
| C. | Diesel engine power plant |
| D. | Any of the above |
| E. | None of the above |
| Answer» C. Diesel engine power plant | |
| 3. |
100 MW Dhurva reactor is basically a |
| A. | research reactor |
| B. | power generation unit |
| C. | recycling unit |
| D. | None of the above |
| E. | None of the above |
| Answer» A. research reactor | |
| 4. |
Which of the following plant is suitable for peak load? |
| A. | Diesel engine plant |
| B. | Steam power plant |
| C. | Nuclear power plant |
| D. | Hydro-electric power plant |
| E. | All of the above |
| Answer» A. Diesel engine plant | |
| 5. |
Gas turbines are widely used in |
| A. | Power generation |
| B. | Aircraft |
| C. | Pumping stations |
| D. | Ship |
| E. | Locomotive |
| Answer» B. Aircraft | |
| 6. |
The alternators for a steam power plant usually run at |
| A. | 3000 rpm |
| B. | 1500 rpm |
| C. | 1200 rpm |
| D. | 30,000 rpm |
| E. | 750 rpm |
| Answer» A. 3000 rpm | |
| 7. |
Producer gas mainly contains |
| A. | carbon dioxide and steam |
| B. | carbon monoxide and nitrogen |
| C. | methane, ethane and butane |
| D. | hydrocarbons |
| E. | None of the above |
| Answer» B. carbon monoxide and nitrogen | |
| 8. |
Which of the following equipment is installed in power plants to reduce air pollution due to smoke? |
| A. | Desuperheaters |
| B. | Electrostaric precipitators |
| C. | Reheaters |
| D. | Air filters |
| E. | None of the above |
| Answer» B. Electrostaric precipitators | |
| 9. |
The flicker effect of fluorescent lamps is more pronounced at |
| A. | Lower frequencies |
| B. | Higher frequencies |
| C. | Lower voltage |
| D. | Higher voltages |
| E. | None of the above |
| Answer» E. None of the above | |
| 10. |
Geologists believe that below the earth's crust, the molten mass exists in the form of |
| A. | magma |
| B. | vent |
| C. | hot cell |
| D. | liquation |
| E. | None of the above |
| Answer» A. magma | |
| 11. |
Return to earth of the oxides of sulphur and nitrogen occurs in the form of |
| A. | acid rain |
| B. | acid show |
| C. | acid fog |
| D. | any of the above |
| E. | None of the above |
| Answer» D. any of the above | |
| 12. |
ASTM coal classification is based on |
| A. | proximate analysis |
| B. | ultimate analysis |
| C. | orsat analysis |
| D. | None of the above |
| E. | None of the above |
| Answer» A. proximate analysis | |
| 13. |
The phenomenon of physical adhesion of molecules to the surfaces of solids without chemical reaction is known as |
| A. | dredging |
| B. | coking |
| C. | adsorption |
| D. | liquation |
| E. | None of the above |
| Answer» C. adsorption | |
| 14. |
When a conductor is suspended between two supports at the same level it taken the shape of |
| A. | Parabola |
| B. | Semi-circle |
| C. | Cycloid |
| D. | Epicycloid |
| E. | Catenary |
| Answer» E. Catenary | |
| 15. |
Which of the following plant can be conveniently located close to be load centre? |
| A. | Nuclear power plant |
| B. | Hydro-electric power plant |
| C. | Diesel engine power plant |
| D. | Steam power plant |
| E. | All of the above |
| Answer» C. Diesel engine power plant | |
| 16. |
Fluidized bed combustion helps to reduce |
| A. | boiler size |
| B. | pollution |
| C. | both (A) and (B) above |
| E. | None of the above |
| Answer» C. both (A) and (B) above | |
| 17. |
Electrostatic precipitators are most effective on |
| A. | carbon dioxide |
| B. | nitrogen |
| C. | coarse dust |
| D. | fine dust |
| E. | None of the above |
| Answer» D. fine dust | |
| 18. |
A 660 V cable is known as |
| A. | Extra high tension cable |
| B. | High tension cable |
| C. | Super tension cable |
| D. | Low tension cable |
| E. | Extra super voltage cable |
| Answer» D. Low tension cable | |
| 19. |
Which of the following public sector unit is engaged in the manufacture of thermal power plants? |
| A. | Department of science and technology |
| B. | National Thermal Power Corporation Ltd |
| C. | Heavy Engineering Corporation Ltd |
| D. | Bharat Heavy Electricals Ltd |
| E. | Coal India Ltd |
| Answer» D. Bharat Heavy Electricals Ltd | |
| 20. |
A layer of fibrous material like jute or hessian type provided over metallic sheath on a cable is known as |
| A. | Armouring |
| B. | Bedding |
| C. | Laying |
| D. | Cover |
| E. | None of the above |
| Answer» B. Bedding | |
| 21. |
In a long transmission line, the effect of |
| A. | resistance and capacitance is taken into account but effect of inductance is neglected |
| B. | resistance, capacitance and inductance is taken into account |
| C. | capacitance and inductance is taken into account but effect of resistance is neglected |
| D. | resistance, capacitance and inductance is neglected |
| E. | resistance and inductance is taken into account but effect of capacitance is neglected |
| Answer» B. resistance, capacitance and inductance is taken into account | |
| 22. |
Which of the following short-circuit is the most dangerous? |
| A. | Line to line short circuit |
| B. | Dead short circuit |
| C. | Line to ground short circuit |
| D. | Line to line and ground short circuit |
| E. | None of the above |
| Answer» B. Dead short circuit | |
| 23. |
Transient disturbances are due to |
| A. | switching operations |
| B. | load variations |
| C. | faults |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 24. |
Which of the following power plant will give least running cost of the production of electrical power? |
| A. | Nuclear power plant |
| B. | Gas turbine power plant |
| C. | Diesel engine power plant |
| D. | Steam power plant |
| E. | All will have nearly same running cost |
| Answer» A. Nuclear power plant | |
| 25. |
Which of the following power plant is free from environmental pollution problems? |
| A. | Thermal power plant |
| B. | Nuclear power plant |
| C. | Hydro power plant |
| D. | Geothermal power plant |
| E. | None of the above |
| Answer» C. Hydro power plant | |
| 26. |
In a steam turbine cycle the lowest pressure occurs in |
| A. | Turbine inlet |
| B. | Super-heater |
| C. | Super-heater exit |
| D. | Boiler |
| E. | Condenser |
| Answer» E. Condenser | |
| 27. |
Which of the following is not a high pressure boiler? |
| A. | Loeffler |
| B. | Lancashire coiler |
| C. | Velox boiler |
| D. | La Mont boiler |
| E. | None of the above |
| Answer» B. Lancashire coiler | |
| 28. |
TNT |
| A. | thermonuclear thorium |
| B. | total neutron transition |
| C. | thermal neutron treatment |
| D. | trinitrotoluene |
| E. | None of the above |
| Answer» D. trinitrotoluene | |
| 29. |
All of the following are heavy metals EXCEPT |
| A. | Mercury |
| B. | Sodium |
| C. | Chromium |
| D. | Cadmium |
| E. | None of the above |
| Answer» B. Sodium | |
| 30. |
The characteristic impedance of transmission line depends upon |
| A. | shape of the conductor |
| B. | surface treatment of the conductor |
| C. | geometrical configuration of the conductor |
| D. | conductivity of the material |
| E. | None of the above |
| Answer» C. geometrical configuration of the conductor | |
| 31. |
A relay for protective system should have |
| A. | High speed operation |
| B. | High sensitivity |
| C. | Selectivity |
| D. | Reliability |
| E. | All of the above |
| Answer» E. All of the above | |
| 32. |
Beaufort scale is used to measure |
| A. | beta and gamma radiations |
| B. | wind speed |
| C. | insulation |
| D. | depth of sea |
| E. | None of the above |
| Answer» B. wind speed | |
| 33. |
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. | 0.25 K |
| B. | 2 K |
| C. | 1.25 K |
| D. | 0.3125 K |
| E. | 5 K |
| Answer» D. 0.3125 K | |
| 34. |
The problem of ash handling does not exist in case of ------ fired boilers. |
| A. | Lignite |
| B. | Pulverised fuel |
| C. | Peat |
| D. | Gas |
| E. | None of the above |
| Answer» D. Gas | |
| 35. |
One BTU is the amount of energy required to raise the temperature of |
| A. | One gram of water through 1?F |
| B. | One pound of water through 1?F |
| C. | One kilogram of water through ?F |
| D. | One pound of water through 1?C |
| E. | One gram of water through 1?C |
| Answer» B. One pound of water through 1?F | |
| 36. |
Which of the following material has the best conductivity? |
| A. | Cadmium copper |
| B. | Aluminium |
| C. | Copper |
| D. | 5.71 |
| E. | ACSR |
| Answer» C. Copper | |
| 37. |
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. | 75% |
| B. | 60% |
| C. | 25% |
| D. | 40% |
| E. | 50% |
| Answer» A. 75% | |
| 38. |
Coal rank classifies coal according to its |
| A. | carbon percentage |
| B. | ash content |
| C. | degree of metamorphism |
| D. | density |
| E. | None of the above |
| Answer» C. degree of metamorphism | |
| 39. |
The capacity of generators being installed in super-thermal power plant is |
| A. | 220 MW |
| B. | 400 MW |
| C. | 100 MW |
| D. | 200 MW |
| E. | 500 MW |
| Answer» E. 500 MW | |
| 40. |
The disadvantage of renewable sources of energy is |
| A. | lack of dependability |
| B. | availability in low energy densities |
| C. | intermittency |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 41. |
Local winds are caused by |
| A. | differential heating of land and water |
| B. | differential heating of plains and mountains |
| C. | any of the above |
| E. | None of the above |
| Answer» C. any of the above | |
| 42. |
Corona usually occurs when the electrostatic stress in the air around the conductor exceeds |
| A. | 32 kV (maximum values)/cm |
| B. | 22 kV (maximum value)/cm |
| C. | 11 kV (rms value)/cm |
| D. | 6.6 kV (rms value)/cm |
| E. | None of the above |
| Answer» A. 32 kV (maximum values)/cm | |
| 43. |
Exosphere is the space beyond the earth's atmosphere. It begins at a height of about |
| A. | 100 km |
| B. | 220 km |
| C. | 400 km |
| D. | 1000 km |
| E. | None of the above |
| Answer» D. 1000 km | |
| 44. |
Which of the following power plant can be installed within the shortest possible time? |
| A. | Gas turbine power plant |
| B. | Hydro-electric power plant |
| C. | Steam power plant |
| D. | Nuclear power plant |
| E. | Diesel engine power plant |
| Answer» E. Diesel engine power plant | |
| 45. |
Hopkinson demand rate curve is a |
| A. | one part tariff |
| B. | two part tariff |
| C. | three part tariff |
| D. | four part tariff |
| E. | None of the above |
| Answer» B. two part tariff | |
| 46. |
API gravity is expressed in terms of |
| A. | gm/cc |
| B. | dimensionless numbers |
| C. | degrees |
| D. | None of the above |
| E. | None of the above |
| Answer» C. degrees | |
| 47. |
Which of the following is not the standard rating of GLS lamps in India? |
| A. | 100 W |
| B. | 50 W |
| C. | 25 W |
| D. | 60 W |
| E. | 40 W |
| Answer» B. 50 W | |
| 48. |
Thermal neutrons are |
| A. | exceptionally fast neutrons |
| B. | fast neutrons |
| C. | moderately fast neutrons |
| D. | slow neutrons |
| E. | None of the above |
| Answer» D. slow neutrons | |
| 49. |
Which of the following place is associated with thermal power plants? |
| A. | Obra |
| B. | Tarapur |
| C. | Agra |
| D. | DVC |
| E. | Bhakra |
| Answer» A. Obra | |
| 50. |
Which of the following equipment can be used for improving the power factor ? |
| A. | Static capacitors |
| B. | Synchronous condenser |
| C. | Phase advancer |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
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