MCQOPTIONS
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MCQOPTIONS
This section includes 1292 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
The electrical domestic tube light gives white fluorescent light because of |
| A. | colision between molecules of filled gas under electric current |
| B. | heavy current |
| C. | vacuum inside the tube |
| D. | falling of ultra violet rays on the white inner coating of the tube |
| Answer» E. | |
| 252. |
The direction of heat flow between two objects depends on |
| A. | Their masses |
| B. | Their heat contents |
| C. | Their temperatures |
| D. | Whether they are in solid, liquid or gaseous state |
| Answer» D. Whether they are in solid, liquid or gaseous state | |
| 253. |
The composition of electrician solder is |
| A. | lead-37%, tin-63% |
| B. | Iron-37%, tin-63% |
| C. | lead-37%, Steel-63% |
| D. | Steel-37%, copper-63% |
| Answer» B. Iron-37%, tin-63% | |
| 254. |
The cover of a solar coker is made of glass because |
| A. | it absorbs sun's rays |
| B. | it reflects sun's rays |
| C. | it retains the heat inside by the green house effect |
| D. | it rediates heat better than metals |
| Answer» D. it rediates heat better than metals | |
| 255. |
The diameter of the reflecting surface of a spherical mirror is called a/an |
| A. | principal axis |
| B. | aperture |
| C. | focus |
| D. | pole |
| Answer» C. focus | |
| 256. |
The core of an electromagnet is made of soft iron because soft iron has |
| A. | small susceptibility and small retentivity |
| B. | large susceptibility and small retentivity |
| C. | large density and large retentivity |
| D. | small density and large retentivity |
| Answer» C. large density and large retentivity | |
| 257. |
The complete form of 'IC' in electronics is |
| A. | Internal circuit |
| B. | Independent circuit |
| C. | Integrated circuit |
| D. | Inbuilt circuit |
| Answer» D. Inbuilt circuit | |
| 258. |
The colour of a thin film is due to |
| A. | Scattering |
| B. | Dispersion |
| C. | Diffraction |
| D. | Interference |
| Answer» E. | |
| 259. |
The combined gas law relates which of the following? |
| A. | Volume & Temperature |
| B. | Temperature & Pressure |
| C. | Volume & Pressure |
| D. | Volume, Temperature & Pressure |
| Answer» E. | |
| 260. |
The commercial unit of electrical energy is ..........._x005F_x000D_ |
| A. | Kilowatt-hour |
| B. | Kilowatt |
| C. | Watt |
| D. | Joule |
| Answer» B. Kilowatt | |
| 261. |
The color with the longest wavelength is |
| A. | Red |
| B. | Violet |
| C. | Indigo |
| D. | Orange |
| Answer» B. Violet | |
| 262. |
The centre of the reflecting surface of a spherical mirror is a point called the ___. |
| A. | pole |
| B. | focus |
| C. | radius |
| D. | aperature |
| Answer» B. focus | |
| 263. |
The coil wire in the electric room heater or electric cooking heater is called __________. |
| A. | Circuit |
| B. | Element |
| C. | Filament |
| D. | Cells |
| Answer» C. Filament | |
| 264. |
The characteristic of sound by which we can distinguish between two sounds of the same loudness and pitch is known as:_x005F_x000D_ |
| A. | quality |
| B. | intensity |
| C. | pitch |
| D. | loudness |
| Answer» B. intensity | |
| 265. |
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 | |
| 266. |
The characteristic of ____ is used in the breaking pads of cars. |
| A. | negative effect of friction |
| B. | zero effect of friction |
| C. | weight impulse force tension action |
| D. | positive effect of friction |
| Answer» E. | |
| 267. |
The Capacity of a Communication Channel is Measured in |
| A. | Band rate |
| B. | Band width |
| C. | Data flow |
| D. | Bit capacity |
| Answer» C. Data flow | |
| 268. |
The capacity of a water heater is measured in |
| A. | Gallons |
| B. | Liters |
| C. | Meters |
| D. | Both A & B |
| Answer» E. | |
| 269. |
The capacity of a pure capacitor is 1 farad. In D.C circuit, its effective resistance will be |
| A. | Zero |
| B. | Infinite |
| C. | 1 Ohm |
| D. | 1/2 Ohm |
| Answer» C. 1 Ohm | |
| 270. |
The Brownian Motion was discovered by |
| A. | Robert Brown |
| B. | Mandel Brown |
| C. | Isaac Newton |
| D. | John Brown |
| Answer» B. Mandel Brown | |
| 271. |
The boiling point of liquids vary as |
| A. | pressure varies |
| B. | temperature varies |
| C. | volume varies |
| D. | density varies |
| Answer» B. temperature varies | |
| 272. |
The ......... between two bodies are always equal and opposite._x005F_x000D_ |
| A. | inertia |
| B. | forces |
| C. | pressure |
| D. | momentum |
| Answer» C. pressure | |
| 273. |
The bending of light when it passes around a corner or a slit is due to ______. |
| A. | reflection |
| B. | refraction |
| C. | diffraction |
| D. | total internal reflection |
| Answer» D. total internal reflection | |
| 274. |
The basic reason for the extraordinary sparkle of suitably cut diamond is that |
| A. | it has well defined cleavage planes |
| B. | it has a very high transparency |
| C. | it has a very high refractive index |
| D. | it is very hard |
| Answer» D. it is very hard | |
| 275. |
The atomic bomb is based on the principle of |
| A. | Uncontrolled nuclear fusion |
| B. | Uncontrolled nuclear fission |
| C. | Controlled nuclear fission |
| D. | Controlled nuclear fusion |
| Answer» C. Controlled nuclear fission | |
| 276. |
The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. |
| A. | greater than the weight when the person is stationary |
| B. | twice the weight when the person is stationary |
| C. | less than the weight when the person is stationary |
| D. | same as the weight when the person is stationary |
| Answer» D. same as the weight when the person is stationary | |
| 277. |
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 | |
| 278. |
The area under a Velocity-Time graph represents ______________. |
| A. | distance |
| B. | acceleration |
| C. | force |
| D. | momentum |
| Answer» B. acceleration | |
| 279. |
The amount of water vapor in the air is |
| A. | Hot air |
| B. | Humidity |
| C. | Dew |
| D. | Foam |
| Answer» C. Dew | |
| 280. |
The Ankle is a third-class lever. |
| A. | 1 |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 281. |
The antiparticle of an electron is |
| A. | Positron |
| B. | Proton |
| C. | Alpha particles |
| D. | Beta particles |
| Answer» B. Proton | |
| 282. |
The angle between the __________and the incident ray is called the angle of incidence. |
| A. | surface |
| B. | normal |
| C. | tangent |
| D. | reflected ray |
| Answer» C. tangent | |
| 283. |
The acceleration due to gravity at the surface of the earth (mass M and radius R) is proportional to ___. |
| A. | MR |
| B. | M/R2 |
| C. | M2/R |
| D. | M/R |
| Answer» C. M2/R | |
| 284. |
The ability to do work is called Energy. |
| A. | 1 |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 285. |
The absolute refractive index of air is |
| A. | 1.03 |
| B. | 1.00003 |
| C. | 1.003 |
| D. | 1.0003 |
| Answer» E. | |
| 286. |
Terminal velocity ________. |
| A. | first increases before decreasing |
| B. | is constant |
| C. | first decreases before increasing |
| D. | always keeps on increasing |
| Answer» C. first decreases before increasing | |
| 287. |
The absolute refractive index of any medium is always: |
| A. | more than one |
| B. | |
| C. | 1 |
| D. | less than one |
| Answer» B. | |
| 288. |
The absorption of ink by blotting paper involves |
| A. | viscosity of ink |
| B. | diffusion of ink through the blotting |
| C. | capillary action phenomenon |
| D. | siphon action |
| Answer» D. siphon action | |
| 289. |
Tensional forces normally cause which one of the following? |
| A. | normal faults |
| B. | strike-slip faults |
| C. | thrust faults |
| D. | reverse faults |
| Answer» B. strike-slip faults | |
| 290. |
Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be |
| A. | P |
| B. | 3P |
| C. | p/3 |
| D. | 2p/ 3 |
| Answer» C. p/3 | |
| 291. |
Temperature of distant luminous bodies can be determined by |
| A. | Mercury thermometers |
| B. | Gas thermometers |
| C. | Pyrometers |
| D. | Colour thermometers |
| Answer» D. Colour thermometers | |
| 292. |
Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water |
| A. | increases to a great extent |
| B. | increases slightly |
| C. | decreases slightly |
| D. | decreases rapidly |
| Answer» D. decreases rapidly | |
| 293. |
Sunspots appear dark because they are |
| A. | hotter than the rest of the Sun's surface. |
| B. | more magnetic than the rest of the Sun's surface. |
| C. | cooler than the rest of the Sun's surface. |
| D. | None of the above |
| Answer» D. None of the above | |
| 294. |
Steel is more elastic than Rubber. True or False? |
| A. | 1 |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 295. |
Study the following figure carefully and answer the question that follows._x005F_x000D_ Â _x005F_x000D_ _x005F_x000D_ Â _x005F_x000D_ If the pivot is shifted 3 cm towards left, then what will be the moment of the couple at the new position?_x005F_x000D_ |
| A. | 80 Nm |
| B. | 10 Nm |
| C. | 0.8 Nm |
| D. | None |
| Answer» E. | |
| 296. |
Supercooling 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 | |
| 297. |
Sudden fall in the barometric reading is an indication of _______. |
| A. | Storm |
| B. | Scorching heat |
| C. | Rain |
| D. | Clear weather |
| Answer» B. Scorching heat | |
| 298. |
Speed of sound is maximum in which among the following? |
| A. | Gases |
| B. | Vaccum |
| C. | Liquids |
| D. | Solids |
| Answer» E. | |
| 299. |
Speed in a given direction is called |
| A. | Velocity |
| B. | Torque |
| C. | Acceleration |
| D. | Displacement |
| Answer» B. Torque | |
| 300. |
Speed regulation of synchronous motor is |
| A. | 0.01 |
| B. | 0.25 |
| C. | Zero |
| D. | 0.005 |
| Answer» D. 0.005 | |