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.
| 151. |
Postage Meter was invented by - |
| A. | Fyodor Pirotsky |
| B. | Arthur Pitney |
| C. | Fritz Pfleumer |
| D. | Stephen Perry |
| Answer» C. Fritz Pfleumer | |
| 152. |
Alfred Nobel invented - |
| A. | X ray |
| B. | Diesel Engine |
| C. | Dynamite |
| D. | Dynamo |
| Answer» D. Dynamo | |
| 153. |
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same - |
| A. | velocity |
| B. | momentum |
| C. | acceleration |
| D. | kinetic energy |
| Answer» C. acceleration | |
| 154. |
An electron microscope gives higher magnifications than an optical microscope because |
| A. | The velocity of electrons is smaller than that of light |
| B. | The wavelength of electrons is smaller as compared to the wavelength of visible light |
| C. | The electrons have more energy than the light particulars |
| D. | The electron microscope uses more powerful lenses |
| Answer» C. The electrons have more energy than the light particulars | |
| 155. |
The mass of an electron in motion depends upon - |
| A. | Direction of motion |
| B. | B its velocity |
| C. | C its velocity of e- |
| D. | D it s shell number |
| Answer» C. C its velocity of e- | |
| 156. |
An electron microscope gives higher magnification than an optical microscope, because: |
| A. | It uses more powerful lenses |
| B. | the velocity of electron is smaller than that of visible |
| C. | the electrons have more energy than the light particles |
| D. | the wavelength of electrons is smaller as compared to the wavelength of visible light |
| Answer» E. | |
| 157. |
Nichrome wire is used in an electric heater because . |
| A. | It has high resistance |
| B. | It has high melting point |
| C. | It can resist a current upto approx 5 amperes |
| D. | For all of the above reasons |
| Answer» E. | |
| 158. |
The apparent weight of a man in a lift is less the real weight when |
| A. | the lift is going up with an acceleration |
| B. | the lift is going down with uniform speed |
| C. | the lift is going up with uniform speed |
| D. | the lift is going down with an acceleration |
| Answer» E. | |
| 159. |
What is the approximate height of a geostationary satellite from the surface of the earth? |
| A. | 981 km |
| B. | 15000 km |
| C. | 35000 km |
| D. | 55000 km |
| Answer» D. 55000 km | |
| 160. |
A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct? |
| A. | Both the spheres will reach the ground simultaneously. |
| B. | A will reach the ground first. |
| C. | B will reach the ground first. |
| D. | The question is incomplete because the masses of the spheres are not given. |
| Answer» B. A will reach the ground first. | |
| 161. |
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole? |
| A. | Increase |
| B. | Decrease |
| C. | Remain constant |
| D. | Will increase first and then decrease |
| Answer» B. Decrease | |
| 162. |
When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is clue to the phenomenon of |
| A. | evaporation |
| B. | vaporisation |
| C. | diffusion |
| D. | sublimation |
| Answer» D. sublimation | |
| 163. |
Super cooling stands for cooling of a liquid |
| A. | at freezing point |
| B. | below freezing point |
| C. | at melting point |
| D. | above melting point |
| Answer» C. at melting point | |
| 164. |
Super cooling is cooling of liquid . |
| A. | below melting point |
| B. | below freezing point |
| C. | at melting point |
| D. | above melting point |
| Answer» C. at melting point | |
| 165. |
The frequency of direct current is . |
| A. | Zero |
| B. | 50 HZ |
| C. | 60 HZ |
| D. | 100 HZ |
| Answer» B. 50 HZ | |
| 166. |
What is the name of the device used to convert alternating cur-rent into direct current? |
| A. | Amreter |
| B. | Galvanometer |
| C. | Rectifier |
| D. | Transformer |
| Answer» D. Transformer | |
| 167. |
The hydraulic brake used in automobiles is a direct application of - |
| A. | Archimedes principle |
| B. | Torricellean law |
| C. | Bernoulli's Theorem |
| D. | Pascal's law |
| Answer» E. | |
| 168. |
The S.I. unit of electric charge is |
| A. | ampere |
| B. | coulomb |
| C. | e.s.u |
| D. | Kelvin |
| Answer» C. e.s.u | |
| 169. |
The base of an electric iron is brightly polished mainly - |
| A. | to make it smooth and frictionless |
| B. | to make it rust-proof |
| C. | to reduce heat loss by radiation |
| D. | to make it more durable |
| Answer» D. to make it more durable | |
| 170. |
The electric charge is stored in a device called: |
| A. | Inductor |
| B. | Capacitor |
| C. | Resister |
| D. | Transformer |
| Answer» C. Resister | |
| 171. |
Which of the following is used for regulated electric supply? |
| A. | Zener diode |
| B. | Junction diode |
| C. | Gun diode |
| D. | Tunnel diode |
| Answer» B. Junction diode | |
| 172. |
That an Iron ship floats in water but an Iron ball sinks, is an example of - |
| A. | Newton's second law |
| B. | Pascal's law |
| C. | Archimedes Principle |
| D. | Dalton's law |
| Answer» D. Dalton's law | |
| 173. |
The wire having a green plastic covering is a . |
| A. | Line wire |
| B. | Neutral wire |
| C. | Earth wire |
| D. | None of these |
| Answer» D. None of these | |
| 174. |
A good conductor while carrying current is - |
| A. | alternately charged positive and negative |
| B. | negatively charged |
| C. | positively charged |
| D. | electrically neutral |
| Answer» C. positively charged | |
| 175. |
When heated from 0 C to 100 C volume of a given mass of water will |
| A. | Increase gradually |
| B. | Decrease gradually |
| C. | Increase and then will decrease |
| D. | Decrease and then will Increase |
| Answer» E. | |
| 176. |
When water is heated from 0 C to 10 C. Its volume |
| A. | increases |
| B. | decreases |
| C. | does not change |
| D. | first decreases and then increases |
| Answer» E. | |
| 177. |
The mass of water vapour per unit volume of air is known as - |
| A. | relative humidity |
| B. | specific humidity |
| C. | absolute humidity |
| D. | variable humidity |
| Answer» D. variable humidity | |
| 178. |
The mass of a star is two times the mass of the Sun. How it will come to an end? |
| A. | Neutron Star |
| B. | Black hole |
| C. | White Dwarf |
| D. | Red Giant |
| Answer» B. Black hole | |
| 179. |
Amount of water vapour in a unit volume (Cubic metre) of air is called: |
| A. | Mixed ratio |
| B. | relative humidity |
| C. | absolute humidity |
| D. | specific humidity |
| Answer» D. specific humidity | |
| 180. |
The commonly used thermometric substance is _____. |
| A. | mineral oil |
| B. | Alcohol |
| C. | Mercury |
| D. | Petrol |
| Answer» D. Petrol | |
| 181. |
The process of union of two or more molecules of a substance to form a large single molecule is called : |
| A. | Fusion |
| B. | Diffusion |
| C. | Polymerization |
| D. | Synthesis |
| Answer» D. Synthesis | |
| 182. |
With the increase of pressure, the boiling point of any substance - |
| A. | Increases |
| B. | Decreases |
| C. | Remains Same |
| D. | Becomes zero |
| Answer» B. Decreases | |
| 183. |
If a lift is going up with acceleration, the apparent weight of a body is - |
| A. | More or less the true weight |
| B. | Equal to the true weight |
| C. | Less than the true weight |
| D. | More than the true weight |
| Answer» E. | |
| 184. |
For body moving with non-uniform velocity and uniform acceleration |
| A. | Displacement Time graph |
| B. | Displacement Time graph |
| C. | Velocity - Time graph is non-linear |
| D. | Velocity - Time graph is linear |
| Answer» C. Velocity - Time graph is non-linear | |
| 185. |
What is unit of Electrical Capacity? |
| A. | henry |
| B. | farad |
| C. | volt |
| D. | ohm |
| Answer» C. volt | |
| 186. |
Which of the following in the correct device that converts thermal energy into electrical energy? |
| A. | constant volume gas thermometer |
| B. | liquid-in-glass thermometer |
| C. | thermopile |
| D. | none of these |
| Answer» D. none of these | |
| 187. |
Conversion of heat into electrical er is achieved by using |
| A. | Ammeter |
| B. | Hydrometer |
| C. | Voltmeter |
| D. | Thermocouple |
| Answer» E. | |
| 188. |
The compound of a metal found in nature is called - |
| A. | Mineral |
| B. | Ore |
| C. | Flux |
| D. | Slag |
| Answer» B. Ore | |
| 189. |
Compared to fresh Water, the freezing point of sea water is - |
| A. | Higher |
| B. | Lower |
| C. | Same |
| D. | Depends on the sea from which the water is sourced |
| Answer» C. Same | |
| 190. |
Which is best used as a sound absorbing material in partition walls? |
| A. | Stone chips |
| B. | Steel |
| C. | Glass - wool |
| D. | Glass pieces |
| Answer» D. Glass pieces | |
| 191. |
Which of the following produces more severe burns? |
| A. | Boiling water |
| B. | Hot water |
| C. | Steam |
| D. | Melting Iceberg |
| Answer» D. Melting Iceberg | |
| 192. |
The temperature of boiling water in a steam engine may be high because - |
| A. | there are dissolved substances in water |
| B. | there is low pressure inside the boiler |
| C. | there is high pressure inside the boiler |
| D. | the lire is at very high temperature |
| Answer» D. the lire is at very high temperature | |
| 193. |
A steam engine converts the heat energy of steam into . |
| A. | Electrical energy |
| B. | Chemical energy |
| C. | Mechanical energy |
| D. | Thermal energy |
| Answer» D. Thermal energy | |
| 194. |
Tesla is a unit of magnetic |
| A. | flux |
| B. | induction |
| C. | moment |
| D. | field |
| Answer» E. | |
| 195. |
One bar is equal to (1) 10 Pa |
| A. | 100 Pa |
| B. | 10 7 Pa |
| C. | 10 Pa |
| D. | none |
| Answer» D. none | |
| 196. |
A piece of wood is held under water. The up thrust on it will be: |
| A. | equal to the weight of the Wood |
| B. | less than weight of the wood |
| C. | more than weight of the wood |
| D. | Zero |
| Answer» C. more than weight of the wood | |
| 197. |
A camera uses a to form an image on a piece of film at the back. |
| A. | convex lens |
| B. | concave lens |
| C. | diverging lens |
| D. | none of these |
| Answer» B. concave lens | |
| 198. |
If the temperature of a piece increases suddenly, the relative humidity |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | fluctuates |
| Answer» C. remains constant | |
| 199. |
Rectifiers are used to convert - |
| A. | Direct current to Alternating current |
| B. | Alternating current to Direct current |
| C. | high voltage to low voltage |
| D. | low voltage to high voltage |
| Answer» C. high voltage to low voltage | |
| 200. |
A man in a train moving with a constant velocity drops a ball on the platform. The path of the ban as seen by an observer standing on the platform is |
| A. | A straight line |
| B. | A circle |
| C. | A parabola |
| D. | None of these |
| Answer» D. None of these | |