McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 101. |
Sweet gas is free of |
| A. | crabon dioxide |
| B. | carbon monoxide |
| C. | nitrogen |
| D. | hydrogen sulphide |
| E. | None of the above |
| Answer» D. hydrogen sulphide | |
| 102. |
Maximum horse power of a steam locomotive is |
| A. | 2500 |
| B. | 5000 |
| C. | 500 |
| D. | 1500 |
| E. | 100 |
| Answer» D. 1500 | |
| 103. |
Pressure cables are used for |
| A. | Low power factors |
| B. | High current ratings |
| C. | High KVA |
| D. | High kW |
| E. | Higher voltages |
| Answer» E. Higher voltages | |
| 104. |
HRC fuses provide best protection against |
| A. | Short circuits |
| B. | Ligntning |
| C. | Sparking |
| D. | Fire |
| E. | All of the above |
| Answer» A. Short circuits | |
| 105. |
The fact that a conductor carries more current on the surface as compared to core is known as |
| A. | skin effect |
| B. | corona |
| C. | permeability |
| D. | unsymmetrical fault |
| E. | None of the above |
| Answer» A. skin effect | |
| 106. |
Diesel engine fuels are rated by |
| A. | HUCR |
| B. | Cetane number |
| C. | Octane number |
| D. | Calorific value |
| E. | CFR number |
| Answer» B. Cetane number | |
| 107. |
Which of the following area is preferred for solar thermal electric power plants? |
| A. | Mountain tops |
| B. | Hot arid zones |
| C. | Coastal areas |
| D. | High rainfall zones |
| E. | None of the above |
| Answer» B. Hot arid zones | |
| 108. |
The wavelength of green colour is nearly |
| A. | 4000 A |
| B. | 5500 A |
| C. | 2500 A |
| D. | 1000 A |
| E. | 7500 A |
| Answer» B. 5500 A | |
| 109. |
A module is a |
| A. | newly installed solar cell |
| B. | series - parallel arrangement of solar cells |
| C. | a series of solar cells when not used for power generation |
| D. | None of the above |
| E. | None of the above |
| Answer» B. series - parallel arrangement of solar cells | |
| 110. |
Lighite is |
| A. | pure carbon |
| B. | high calorific value coal |
| C. | low calorific value coal |
| D. | a vergetable origin liquid fuel |
| E. | None of the above |
| Answer» C. low calorific value coal | |
| 111. |
The disadvantage of transmission lines as compared to cables is |
| A. | exposure to lightning |
| B. | exposure to atmospheric hazards likes smoke, ice, etc. |
| C. | inductive interference between power and communication circuits |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 112. |
During storm the live conductor of public electric supply breaks of down and touches the earth. The consequence will be |
| A. | supply voltage will drop |
| B. | supply voltage will increase |
| C. | current will flow to earth |
| D. | no current will flow in the conductor |
| E. | None of the above |
| Answer» C. current will flow to earth | |
| 113. |
Photovoltaic solar energy conversion system makes use of |
| A. | fuel cells |
| B. | solar cells |
| C. | solar ponds |
| D. | None of the above |
| E. | None of the above |
| Answer» B. solar cells | |
| 114. |
A photovoltaic cell converts |
| A. | heat energy into mechanical energy |
| B. | chemical energy into electrical energy |
| C. | solar energy into electrical energy |
| D. | electrical energy into chemical energy |
| E. | None of the above |
| Answer» C. solar energy into electrical energy | |
| 115. |
The average load factor of thermal power plants in India is |
| A. | 80 to 95% |
| B. | 50 to 60% |
| C. | 100% |
| D. | 20 to 30% |
| E. | 35 to 40% |
| Answer» B. 50 to 60% | |
| 116. |
The bundling of conductors is done primarily to |
| A. | reduce reactance |
| B. | increase reactance |
| C. | increase radio interference |
| D. | reduce radio interference |
| E. | None of the above |
| Answer» A. reduce reactance | |
| 117. |
Excess air requirement is more in case of |
| A. | chain grate stokers |
| B. | pulverized fuel burning |
| C. | oil firing |
| D. | gas firing |
| E. | None of the above |
| Answer» A. chain grate stokers | |
| 118. |
Which of the following is heavy oil? |
| A. | Gasoline |
| B. | Kerosene oil |
| C. | Diesel oil |
| D. | Bunker oil |
| E. | None of the above |
| Answer» D. Bunker oil | |
| 119. |
Hyperon has mass |
| A. | greater than that of a proton and less than that of a deuteron |
| B. | less than that of a proton and more than that of a deutron |
| C. | more than that of a proton as well as deutron |
| D. | less than that of a proton as well as deutron |
| E. | None of the above |
| Answer» A. greater than that of a proton and less than that of a deuteron | |
| 120. |
A ship is powered by |
| A. | Steam turbine |
| B. | Diesel turbine |
| C. | Steam turbines, diesel engines, hydraulic turbines or nuclear reactors |
| D. | Steam turbines, diesel engines hydraulic turbines |
| E. | Steam turbines or diesel engines |
| Answer» E. Steam turbines or diesel engines | |
| 121. |
A gas turbine works on |
| A. | Regenerative cycle |
| B. | Dual cycle |
| C. | Brayton cycle |
| D. | Rankine cycle |
| E. | Carnot cycle |
| Answer» C. Brayton cycle | |
| 122. |
Maximum permissible span for wooden poles is |
| A. | 60 metres |
| B. | 160 metres |
| C. | 250 metres |
| D. | 500 metres |
| E. | None of the above |
| Answer» A. 60 metres | |
| 123. |
Which of the following process is used for the production of alcohol? |
| A. | Distillation |
| B. | Destructive distillation |
| C. | Cracking |
| D. | Fermentation |
| E. | None of the above |
| Answer» D. Fermentation | |
| 124. |
The effect of corona is |
| A. | increased energy loss |
| B. | increased reactance |
| C. | increased inductance |
| D. | increased susceptance |
| E. | None of the above |
| Answer» A. increased energy loss | |
| 125. |
Solvent refined coal has low percentage of |
| A. | ash |
| B. | sulphur |
| C. | impurities |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 126. |
Grade of the coal is the same as |
| A. | ultimate analysis |
| B. | proximate analysis |
| C. | orsat analysis |
| D. | rank |
| E. | None of the above |
| Answer» D. rank | |
| 127. |
Winds caused by greater solar heating of the earth's surface near the equator than near the northern or southern poles, are known as |
| A. | local winds |
| B. | equatorial winds |
| C. | planetary winds |
| D. | trade winds |
| E. | None of the above |
| Answer» C. planetary winds | |
| 128. |
One barrel is nearly |
| A. | 0.96 cubic metre |
| B. | 0.44 cubic metre |
| C. | 0.16 cubic metre |
| D. | 0.013 cubic metre |
| E. | None of the above |
| Answer» C. 0.16 cubic metre | |
| 129. |
Solid or liquid particles of microscopic size which are suspended in air or another gas from what is known as |
| A. | aerosol |
| B. | hyperon |
| C. | geognosy |
| D. | eluvium |
| E. | None of the above |
| Answer» A. aerosol | |
| 130. |
The live storage of coal in power plant means |
| A. | Purified coal |
| B. | Storage of coal sufficient to meet hour demand for the plant. |
| C. | Coal ready for combustion |
| D. | Coal in transit |
| E. | Preheated coal |
| Answer» B. Storage of coal sufficient to meet hour demand for the plant. | |
| 131. |
Under no load conditions the current in a transmission line is due to |
| A. | corona effects |
| B. | capacitance of the line |
| C. | back flow from earth |
| D. | spinning reserve |
| E. | None of the above |
| Answer» B. capacitance of the line | |
| 132. |
The maximum number of generators in a power plant must be |
| A. | Two |
| B. | Odd |
| C. | One |
| D. | Even |
| E. | Three |
| Answer» A. Two | |
| 133. |
The area under the load curve represents |
| A. | System voltage |
| B. | Average demand |
| C. | Maximum demand |
| D. | Energy consumed |
| E. | Current |
| Answer» D. Energy consumed | |
| 134. |
All of the following are electrical mechanical storage systems EXCEPT |
| A. | pumped hydro system |
| B. | torsion bar system |
| C. | super conducting coils |
| D. | kinetic flywheels |
| E. | None of the above |
| Answer» C. super conducting coils | |
| 135. |
Thermal storage of energy is possible in the form of |
| A. | sensible heat |
| B. | latent heat |
| C. | chemical reaction |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 136. |
Out of the following which one is not a unconventional source of energy? |
| A. | Magneto hydrodynamic generator |
| B. | Nuclear energy |
| C. | Wind power |
| D. | Geothermal energy |
| E. | Tidal power |
| Answer» B. Nuclear energy | |
| 137. |
In which of the following state manufacturing unit of M/S Bharat Heavy Electricals Ltd. Is not located? |
| A. | Rajasthan |
| B. | Karnataka |
| C. | Andhra Pardesh |
| D. | U.P. |
| E. | M.P. |
| Answer» A. Rajasthan | |
| 138. |
The value of an equipment at the end of its useful life is known as |
| A. | Useful value |
| B. | Obsolescence value |
| C. | Demand value |
| D. | Scrap value |
| E. | Replacement value |
| Answer» D. Scrap value | |
| 139. |
The effect of electric shock on human body depends on |
| A. | voltage |
| B. | Current |
| C. | Duration of contact |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 140. |
Which of the following will need the lower level of illumination? |
| A. | Green rooms |
| B. | Railway platform |
| C. | Auditoriums |
| D. | Hospital wards |
| E. | Display |
| Answer» B. Railway platform | |
| 141. |
The calorific value of coal gas is expected to be around |
| A. | 1500 kcal/m3 |
| B. | 500 kcal/m3 |
| C. | 2500 kcal/m3 |
| D. | 7500 kcal/m3 |
| E. | 5000 kcal/m3 |
| Answer» D. 7500 kcal/m3 | |
| 142. |
A super-thermal power station has |
| A. | total generating capacity of over 2000 MW |
| B. | generating units running at above the critical steam |
| C. | steam generated at critical pressure |
| D. | unity power factor |
| E. | None of the above |
| Answer» A. total generating capacity of over 2000 MW | |
| 143. |
A jet aircraft is powered by |
| A. | Batteries |
| B. | Petrol engines |
| C. | Solar cells |
| D. | Gas turbine |
| E. | Diesel engines |
| Answer» D. Gas turbine | |
| 144. |
pF number refers to |
| A. | acidic/alkaline water |
| B. | energy with which water is held in the soil |
| C. | decomposition of molecules caused by the absorption of light |
| D. | smog produced by the action of sunlight on the pollutants |
| E. | None of the above |
| Answer» B. energy with which water is held in the soil | |
| 145. |
All of the following plants are suitable for peak load EXCEPT |
| A. | Gas turbine plant |
| B. | Pumped storage plant |
| C. | Diesel engine plant |
| D. | Nuclear power plant |
| E. | All of the above |
| Answer» D. Nuclear power plant | |
| 146. |
One calorie is the same as |
| A. | 4.18 joules |
| B. | 4.11 watts |
| C. | 1 dyne |
| D. | 1 dyne-sec |
| E. | 1 watt |
| Answer» A. 4.18 joules | |
| 147. |
Liquids lighter than water (such as petroleum oils) have API gravities numerically |
| A. | less than 1.0 |
| B. | greater than 1.0 |
| C. | greater than 10 |
| D. | around 100 |
| E. | None of the above |
| Answer» A. less than 1.0 | |
| 148. |
Most of the thermal power plants in India are using |
| A. | bagasse as fuel |
| B. | lignite as fuel |
| C. | pulverized fuel |
| D. | peat as fuel |
| E. | None of the above |
| Answer» C. pulverized fuel | |
| 149. |
The percentage of carbon in anthracite is generally |
| A. | more than 90% |
| B. | around 75% |
| C. | between 50% and 70% |
| D. | below 50% |
| E. | None of the above |
| Answer» A. more than 90% | |
| 150. |
Wooden poles for supporting transmission lines are used for voltages upto |
| A. | 440 V |
| B. | 11 kV |
| C. | 22 kV |
| D. | 66 kV |
| E. | None of the above |
| Answer» C. 22 kV | |
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