MCQOPTIONS
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MCQOPTIONS
This section includes 467 Mcqs, each offering curated multiple-choice questions to sharpen your Railways knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
An example of conductor of heat is |
| A. | paper |
| B. | cloth |
| C. | air |
| D. | aluminum |
| Answer» E. | |
| 252. |
Metals are best |
| A. | insulators of heat |
| B. | conductors of heat |
| C. | sharers of heat |
| D. | insulators of electricity |
| Answer» C. sharers of heat | |
| 253. |
If a substance is hot, its particles |
| A. | move more faster than the cooler object |
| B. | move more slower than the cooler object |
| C. | move at the same rate as the cooler object |
| D. | May move faster it slower than the cooler object. |
| Answer» B. move more slower than the cooler object | |
| 254. |
Newton's law of cooling is also applicable to |
| A. | convection losses. |
| B. | natural convection losses. |
| C. | forced convection losses. |
| D. | conduction losses. |
| Answer» D. conduction losses. | |
| 255. |
Nekton's law of cooling is applicable for |
| A. | any excess of temperature over the surrounding. |
| B. | small excess of temperature over the surrounding. |
| C. | large excess of temperature over the surrounding. |
| D. | very large excess of temperature over the surrounding. |
| Answer» C. large excess of temperature over the surrounding. | |
| 256. |
Which of the following is not a unit of heat energy? |
| A. | joule |
| B. | kelvin |
| C. | calorie |
| D. | None of these |
| Answer» C. calorie | |
| 257. |
At temperature T, the emissive power and absorption power of a body for certain wavelength are \[{{e}_{1}}\], and \[{{a}_{1}}\] respectively, then |
| A. | \[{{e}_{1}}={{a}_{1}}\] |
| B. | \[{{e}_{1}}>{{a}_{1}}\] |
| C. | \[{{e}_{1}}<{{a}_{1}}\] |
| D. | there will not be any definite relation between \[{{e}_{1}}\] and \[{{a}_{1}}\] |
| Answer» B. \[{{e}_{1}}>{{a}_{1}}\] | |
| 258. |
Lamp black absorbs radiant heat which is near about |
| A. | 90% |
| B. | 98% |
| C. | 100% |
| D. | 50% |
| Answer» C. 100% | |
| 259. |
Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | None of these |
| Answer» C. radiation | |
| 260. |
Which law is obeyed when temperature difference between the body and the surroundings is small? |
| A. | Stefan's law |
| B. | Newton's law of cooling |
| C. | Planck's law |
| D. | All of these |
| Answer» C. Planck's law | |
| 261. |
.. and ...B... of heat energy required some material as a transport medium. Hear, A and B refer to |
| A. | conduction, radiation |
| B. | radiation, convection |
| C. | conduction, convection |
| D. | radiation, evaporation |
| Answer» D. radiation, evaporation | |
| 262. |
The latent heat of vaporization of a substance is always |
| A. | greater than its latent heat of fusion |
| B. | greater than its latent heat of sublimation |
| C. | equal to its latent heat of sublimation |
| D. | less than its latent heat of fusion |
| Answer» B. greater than its latent heat of sublimation | |
| 263. |
The value of molar heat capacity at constant temperature is |
| A. | zero |
| B. | infinity |
| C. | unity |
| D. | 42 |
| Answer» C. unity | |
| 264. |
The equation\[\frac{{{T}_{F}}-32}{180}=\frac{{{T}_{c}}}{100},\]relates the Fahrenheit and Celsius scale temperature. The \[{{T}_{F}}\] versus \[{{T}_{c}}\] graph will be |
| A. | straight line parallel to x-axis |
| B. | straight line parallel to y-axis |
| C. | straight line inclined to x-axis |
| D. | parabolic curve |
| Answer» D. parabolic curve | |
| 265. |
Which of the following is the unit of specific heat |
| A. | \[J\,\,kg{}^\circ {{C}^{-1}}\] |
| B. | \[J/kg{}^\circ C\] |
| C. | \[kg{}^\circ C/J\] |
| D. | \[J/kg{}^\circ {{C}^{-2}}\] |
| Answer» C. \[kg{}^\circ C/J\] | |
| 266. |
Heat content of a body depends on |
| A. | mass of the body |
| B. | temperature of the body |
| C. | specific heat capacity |
| D. | all of the above |
| Answer» E. | |
| 267. |
Heat is associated with |
| A. | kinetic energy of random motion of molecules |
| B. | kinetic energy of orderly motion of molecules |
| C. | total kinetic energy of random and orderly motion of molecules |
| D. | None of these |
| Answer» B. kinetic energy of orderly motion of molecules | |
| 268. |
In a food chain, humans are |
| A. | Secondary consumers |
| B. | Primary consumer |
| C. | Producers |
| D. | Primary and secondary consumers both |
| Answer» E. | |
| 269. |
The radiations absorbed by ozone layer are |
| A. | Ultra-violet |
| B. | Infra-red |
| C. | Gamma rays |
| D. | Visible |
| Answer» B. Infra-red | |
| 270. |
Environment Protection Act of 1986 is meant for |
| A. | Waste management |
| B. | Forest management |
| C. | Desert management |
| D. | Protection of human environment including human, plants, animals and property |
| Answer» E. | |
| 271. |
The first major environmental protection law promulgated in India was |
| A. | Air Act |
| B. | Water Act |
| C. | Environmental Act |
| D. | None of these |
| Answer» C. Environmental Act | |
| 272. |
During greenhouse effect, carbon dioxide and water vapours absorbs, |
| A. | UV radiations |
| B. | Solar radiation |
| C. | Short wave radiations |
| D. | Long wave radiations |
| Answer» E. | |
| 273. |
The main impact of urbanization on plant and animal life is |
| A. | Loss of species |
| B. | Mutation in species |
| C. | Increase in species |
| D. | None of these |
| Answer» B. Mutation in species | |
| 274. |
Climate and global air circulations are mainly affected by the properties of |
| A. | Temperature |
| B. | Precipitation |
| C. | Water and air |
| D. | None of the above |
| Answer» B. Precipitation | |
| 275. |
Global warming affects |
| A. | Climate change |
| B. | Food production |
| C. | Melting of glaciers |
| D. | All of these |
| Answer» E. | |
| 276. |
Global waning means: |
| A. | Increase in Earth's Body Temperature |
| B. | Increase in solar radiation |
| C. | Acid Rain |
| D. | All the above |
| Answer» B. Increase in solar radiation | |
| 277. |
The primary reason for large scale decline in population death rate during 20th century was |
| A. | Improved environmental conditions |
| B. | Improved medical care and control of epidemics |
| C. | Both [a] and [b] |
| D. | None of these. |
| Answer» C. Both [a] and [b] | |
| 278. |
Loss of water content through the plants into the atmosphere is called: |
| A. | Evaporation |
| B. | Vaporization |
| C. | Hydraulic cycle |
| D. | Transpiration |
| Answer» E. | |
| 279. |
Which of the following is a major environmental issue in mining activities? |
| A. | Water pollution |
| B. | Soil Degradation |
| C. | Air pollution and dust |
| D. | All of these |
| Answer» E. | |
| 280. |
The science that deals with the relationship of various organisms with their environment is known as |
| A. | anthropology |
| B. | economics |
| C. | ecology |
| D. | geology |
| Answer» D. geology | |
| 281. |
Smog is combination of |
| A. | Smoke and snow |
| B. | Snow and fog |
| C. | Smoke and fog |
| D. | None of these. |
| Answer» D. None of these. | |
| 282. |
The adverse effect of modern agriculture is |
| A. | Soil pollution |
| B. | Water pollution |
| C. | Wastes logging |
| D. | All of these. |
| Answer» E. | |
| 283. |
Good example of renew able energy resource is |
| A. | 01 |
| B. | Coal |
| C. | Hydropower |
| D. | All the above |
| Answer» D. All the above | |
| 284. |
The fossil fuel which causes maximum environmental pollution due to its use in generation of thermal power is |
| A. | Oil |
| B. | Coal |
| C. | Natural gas |
| D. | None of these |
| Answer» C. Natural gas | |
| 285. |
Water used for irrigation of food crops, fodder crops and medical herbs in known as |
| A. | Auxiliary use |
| B. | Productive use |
| C. | Commercial use |
| D. | Consumptive use |
| Answer» C. Commercial use | |
| 286. |
Hydro electricity is generated from |
| A. | Forests |
| B. | Coal plants |
| C. | Lakes and ponds |
| D. | Water reservoir of river dams |
| Answer» E. | |
| 287. |
Cow dung can be used |
| A. | as manure |
| B. | for production of biogas |
| C. | both [a] and [b] |
| D. | none of these |
| Answer» D. none of these | |
| 288. |
ELA is related to: |
| A. | Environmental Impact Assessment |
| B. | Environmental and Industrial Activities |
| C. | Environmental Internal Activities |
| D. | Environmental Impact Activities |
| Answer» B. Environmental and Industrial Activities | |
| 289. |
Which of the following is an example of impact of development activities on the Hydrosphere? |
| A. | Air pollution |
| B. | Soil pollution |
| C. | Soil erosion |
| D. | Water pollution |
| Answer» E. | |
| 290. |
Which of the following is/are major Environmental issues in Mining activities? |
| A. | Water pollution |
| B. | Soil Degradation |
| C. | Air pollution and Dust |
| D. | All the above |
| Answer» E. | |
| 291. |
The natural disastrous events like volcanoes, earthquakes, cyclones, bring about environmental changes which are |
| A. | Reversible |
| B. | Irreversible |
| C. | Both [a] and [b] |
| D. | None of these |
| Answer» D. None of these | |
| 292. |
Amount of carbon dioxide present in atmospheric air is |
| A. | 0.318% |
| B. | 0.383% |
| C. | 21% |
| D. | 78% |
| Answer» B. 0.383% | |
| 293. |
The sequence of eating and being eaten in an ecosystem is called |
| A. | food chain |
| B. | carbon cycle |
| C. | sulphur cycle |
| D. | hydrological cycle |
| Answer» B. carbon cycle | |
| 294. |
World Environmental Day' is celebrated every year on: |
| A. | 5th May |
| B. | 5th June |
| C. | 5th July |
| D. | 18th July |
| Answer» C. 5th July | |
| 295. |
Word "Environment" is derived from: |
| A. | Italy |
| B. | French |
| C. | German |
| D. | English |
| Answer» C. German | |
| 296. |
A simple detritus food chain starts with |
| A. | green plant |
| B. | wastes of organisms and dead organisms |
| C. | both of the above |
| D. | none of these |
| Answer» B. wastes of organisms and dead organisms | |
| 297. |
Facultative Bacteria existing in which type of Environmental condition? |
| A. | Presence of oxygen |
| B. | Absence of oxygen |
| C. | Both [a] and [b] |
| D. | None of these. |
| Answer» D. None of these. | |
| 298. |
The perfect equilibrium existing in the biosphere between the various organisms is known as |
| A. | Ecological cycle |
| B. | Ecological balance |
| C. | Environmental balance |
| D. | None of these |
| Answer» C. Environmental balance | |
| 299. |
The objective of environmental studies is to |
| A. | Create environmental ethics that foster awareness about the ecological inter - dependence of economic, social and political factors in a human community and the environment |
| B. | Acquiring skills to help the concerned individuals in identifying and solving environmental problems |
| C. | Raise consciousness about environmental conditions |
| D. | All of the above |
| Answer» E. | |
| 300. |
Environmental education is important only at |
| A. | Primary school stage |
| B. | Secondary school stage |
| C. | Collage stage |
| D. | All stages |
| Answer» E. | |