MCQOPTIONS
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MCQOPTIONS
This section includes 563 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
A man jumping out of a moving train is thrown - |
| A. | forward |
| B. | backward |
| C. | sideways |
| D. | None of these |
| Answer» B. backward | |
| 202. |
The device used for locating submerged objects under sea is |
| A. | sonar |
| B. | radar |
| C. | laser |
| D. | maser |
| Answer» B. radar | |
| 203. |
In the pressure cooker, cooking is faster because the increase in vapour pressure - |
| A. | increase the specific heat |
| B. | decreases the specific heat |
| C. | decreases the boiling point |
| D. | increases the boiling point |
| Answer» E. | |
| 204. |
Transfer of heat energy from a heater coil to the cooking vessel takes place through the process of- |
| A. | Convection only |
| B. | Conduction and convection only |
| C. | Radiation and convection only |
| D. | Convection, conduction and radiation |
| Answer» D. Convection, conduction and radiation | |
| 205. |
In an electric motor, the energy transformation is from . |
| A. | electrical to chemical |
| B. | chemical to light |
| C. | mechanical to electrical |
| D. | electrical to mechanical |
| Answer» E. | |
| 206. |
Pieces of camphor placed on water move about rapidly. This is because of - |
| A. | diffusion |
| B. | viscosity |
| C. | surface tension |
| D. | capillarity |
| Answer» D. capillarity | |
| 207. |
The main purpose of the spacecraft "messenger" is : |
| A. | Orbiting the Venus |
| B. | Orbiting the Mars |
| C. | Mapping and investigating the Mercury |
| D. | None of the above |
| Answer» D. None of the above | |
| 208. |
What is the minimum escape velocity of rocket to be launched into space? |
| A. | 5 Km/Sec. |
| B. | 6 Km/Sec. |
| C. | 11 Km/Sec. |
| D. | 15 Km/Sec. |
| Answer» D. 15 Km/Sec. | |
| 209. |
When a pall of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is |
| A. | below a certain minimum value irrespective of amour of water In the pail |
| B. | above a certain minimum value irrespective of amount of water in the pail |
| C. | above a certain minimum value depending on amount of water in the pail |
| D. | below a certain minimum value depending on amount of water in the pail |
| Answer» C. above a certain minimum value depending on amount of water in the pail | |
| 210. |
The electric motor converts - |
| A. | Electrical energy into mechanical energy |
| B. | Mechanical energy into electrical energy |
| C. | Electrical energy into light energy |
| D. | None of these |
| Answer» B. Mechanical energy into electrical energy | |
| 211. |
A dynamo converts . |
| A. | Mechanical energy into sound energy |
| B. | Mechanical energy into electrical energy |
| C. | Electrical energy into mechanical energy |
| D. | None of these |
| Answer» C. Electrical energy into mechanical energy | |
| 212. |
Rainbows are produced when sunlight |
| A. | Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction |
| B. | Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. |
| C. | Incident on raindrops hanging in the atmosphere is dispersed after suffering reflection. |
| D. | None of the given statements is correct. |
| Answer» C. Incident on raindrops hanging in the atmosphere is dispersed after suffering reflection. | |
| 213. |
The study of phenomena at very low temperatures is called - |
| A. | heat transfer |
| B. | morphology |
| C. | crystallography |
| D. | cryogenics |
| Answer» E. | |
| 214. |
The surface tension of water on adding detergent to it |
| A. | increases |
| B. | decreases |
| C. | no change |
| D. | becomes zero |
| Answer» C. no change | |
| 215. |
The function of ball bearings in a wheel is |
| A. | to increase friction |
| B. | to convert kinetic friction into rolling friction |
| C. | to convert static friction into kinetic friction |
| D. | just for convenience |
| Answer» C. to convert static friction into kinetic friction | |
| 216. |
Instrument used to study the behaviour of a vibrating siring is : |
| A. | Barometer |
| B. | Hydrometer |
| C. | (2) Hygrometer |
| D. | (4) Sonometer |
| Answer» E. | |
| 217. |
Oparin's theary about origin of life' is related to - |
| A. | chemical evolution |
| B. | physical evolution |
| C. | biological evolution |
| D. | artificial evolution |
| Answer» B. physical evolution | |
| 218. |
A temperature rise in environment that disturbs life is called - |
| A. | water pollution |
| B. | nuclear pollution |
| C. | thermal pollution |
| D. | traffic pollution |
| Answer» D. traffic pollution | |
| 219. |
What is the principle of a life Jacket'? |
| A. | It provides oxygen to a drowning person |
| B. | It increases the volume of the person to keep him afloat |
| C. | It decreases the volume of the person to keep him afloat |
| D. | The person can sit on it like a raft |
| Answer» C. It decreases the volume of the person to keep him afloat | |
| 220. |
Sensitivity of the human eye is maximum in the |
| A. | Violet region |
| B. | Green region |
| C. | Blue region |
| D. | Red region |
| Answer» C. Blue region | |
| 221. |
Which of the following colours has got the maximum refractive index for glass? |
| A. | Blue |
| B. | Green |
| C. | Red |
| D. | Indigo |
| Answer» D. Indigo | |
| 222. |
The image of an object formed on the retina of the eye is - |
| A. | virtual and upright |
| B. | virtual and inverted |
| C. | real and inverted |
| D. | Real and upright |
| Answer» D. Real and upright | |
| 223. |
Which one of the following is used to remove Astigmatism for a human eye? |
| A. | Concave lens |
| B. | Convex lens |
| C. | Cylindrical lens |
| D. | Prismatic lens |
| Answer» D. Prismatic lens | |
| 224. |
The first equation of motion gives the relation between : |
| A. | Position and time |
| B. | Position and Velocity |
| C. | Velocity and time |
| D. | Velocity and acceleration |
| Answer» D. Velocity and acceleration | |
| 225. |
`Short-sight' in human eye can be corrected by using proper |
| A. | convex lens |
| B. | concave lens |
| C. | cylindrical lens |
| D. | bifocal lens |
| Answer» C. cylindrical lens | |
| 226. |
Air Quality Index is - |
| A. | an air pollutant measuring machine |
| B. | a measuring scale to show quality of air |
| C. | used for measuring humidity level |
| D. | used for forecasting rain |
| Answer» C. used for measuring humidity level | |
| 227. |
If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? |
| A. | Newton first law |
| B. | Newton second law |
| C. | Newton third law |
| D. | Principle of conservation of linear momentum |
| Answer» E. | |
| 228. |
Sound of frequency below 20 Hz is called . |
| A. | audio sounds |
| B. | infrasonic |
| C. | ultrasonic |
| D. | supersonics |
| Answer» C. ultrasonic | |
| 229. |
If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states that? |
| A. | Newton s first law |
| B. | Newton s Second Law |
| C. | Newton s Third Law |
| D. | Principle of conservation of linear momentum |
| Answer» E. | |
| 230. |
Blowing Air with open pipe is an example of |
| A. | isothermal process |
| B. | isochroric process |
| C. | Isobaric process |
| D. | Adiabatic process |
| Answer» D. Adiabatic process | |
| 231. |
Name the process of production of energy in the Sun |
| A. | Nuclear fission |
| B. | Radioactivity |
| C. | Nuclear fusion |
| D. | Ionization |
| Answer» D. Ionization | |
| 232. |
The force which opposes the relative motion between different layers of liquid or gases is called |
| A. | Critical Velocity |
| B. | Streamline Flow |
| C. | Terminal Velocity |
| D. | Viscous Force |
| Answer» E. | |
| 233. |
Water drops are spherical because of - |
| A. | viscosity |
| B. | density |
| C. | polarity |
| D. | surface tension |
| Answer» E. | |
| 234. |
Which of the following are used for accurately measuring very small time intervals? |
| A. | Pulsars |
| B. | Quartz clocks |
| C. | Atomic clocks |
| D. | White dwarfs |
| Answer» D. White dwarfs | |
| 235. |
The centre of the reflecting surface of a spherical mirror is called the : |
| A. | Radius |
| B. | Centre of Curvature |
| C. | Pole |
| D. | Focus |
| Answer» D. Focus | |
| 236. |
What is found in frequency modulation? |
| A. | Fixed frequency |
| B. | Fixed dimension |
| C. | Change in frequency and dimension |
| D. | Change in dimension only |
| Answer» B. Fixed dimension | |
| 237. |
If input frequency of a full wave rectifier be n, then output frequency would be- |
| A. | n/2 |
| B. | n |
| C. | 3n/2 |
| D. | 2n |
| Answer» E. | |
| 238. |
An instrument that records earth- quakes is |
| A. | Ergograph |
| B. | Ediograph |
| C. | Thermograph |
| D. | Seismograph |
| Answer» E. | |
| 239. |
Which one of the following is an element of weather? |
| A. | Wind |
| B. | Temperature |
| C. | Humidity |
| D. | All options are correct |
| Answer» E. | |
| 240. |
Entropy of the universe is - |
| A. | continuously increasing |
| B. | continuously decreasing |
| C. | zero |
| D. | constant |
| Answer» B. continuously decreasing | |
| 241. |
Vehicles use to see the objects coming from behind. |
| A. | Concave lens |
| B. | Convex lens |
| C. | Convex mirror |
| D. | Concave mirror |
| Answer» C. Convex mirror | |
| 242. |
Cylindrical lens is used by a person suffering from - |
| A. | astigmatism |
| B. | myopia |
| C. | hypermetropia |
| D. | None of these |
| Answer» B. myopia | |
| 243. |
Which of the following supports particle nature of photons? |
| A. | Diffraction |
| B. | Polarization |
| C. | Photoelectric effect |
| D. | Interference |
| Answer» D. Interference | |
| 244. |
Iron which resembles Cobalt and Nickel in properties has been placed far away from these elements. This was one of the limitations of : |
| A. | Modern periodic table |
| B. | Newland's law of octaves |
| C. | Dobereiner's triads |
| D. | Mendeleev's periodic table |
| Answer» C. Dobereiner's triads | |
| 245. |
At what temperature are the temperature on Celsius and Fahrenheit scales equal? |
| A. | 273 Celsius |
| B. | -273 Celsius |
| C. | -40 Celsius |
| D. | 40 Celsius |
| Answer» D. 40 Celsius | |
| 246. |
Which one of the following wavelengths of light is most effective in photosynthesis? |
| A. | Blue |
| B. | Green |
| C. | Orange |
| D. | Yellow |
| Answer» B. Green | |
| 247. |
Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy? |
| A. | Earth |
| B. | Moon |
| C. | Venus |
| D. | Saturn |
| Answer» C. Venus | |
| 248. |
Major portion of the earth s crust is mainly constituted by - |
| A. | Oxygen and Iron |
| B. | Oxygen and Silicon |
| C. | Silicon and Iron |
| D. | Silicon and Aluminium |
| Answer» C. Silicon and Iron | |
| 249. |
A real gas can act as an ideal gas in - |
| A. | high pressure and low temperature |
| B. | low pressure and high temperature |
| C. | high pressure and high temperature |
| D. | low pressure and low temperature |
| Answer» C. high pressure and high temperature | |
| 250. |
Equal volumes of different gases at any definite temperature and pressure have- |
| A. | Equal weights |
| B. | equal masses |
| C. | equal density |
| D. | equal no. of molecules |
| Answer» E. | |