MCQOPTIONS
Saved Bookmarks
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.
| 251. |
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in - |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Both conduction and convection |
| Answer» C. Radiation | |
| 252. |
When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance? |
| A. | four times |
| B. | two times |
| C. | half |
| D. | one-fourth |
| Answer» B. two times | |
| 253. |
A jet engine works, on the principle of conservation of - |
| A. | linear momentum |
| B. | angular momentum |
| C. | energy |
| D. | mass |
| Answer» B. angular momentum | |
| 254. |
The 'four stroke petrol engine' is based on |
| A. | Carnot-cycle |
| B. | Otto-cycle |
| C. | Diesel-cycle |
| D. | Boyle's-cycle |
| Answer» C. Diesel-cycle | |
| 255. |
Which one of the following is a vector quantity? |
| A. | Momentum |
| B. | Pressure |
| C. | Energy |
| D. | Work |
| Answer» B. Pressure | |
| 256. |
Which among the following is the fundamental quantity? |
| A. | Volume |
| B. | Time |
| C. | Velocity |
| D. | Force |
| Answer» C. Velocity | |
| 257. |
Who among the following is the scalar quantity . |
| A. | force |
| B. | pressure |
| C. | velocity |
| D. | acceleration |
| Answer» C. velocity | |
| 258. |
Which one of the following is a non- dimensional quantity? |
| A. | Gas constant |
| B. | Strain |
| C. | Co-efficient of viscosity |
| D. | Plank's constant |
| Answer» C. Co-efficient of viscosity | |
| 259. |
Which physical quantity is measured in siemens ? |
| A. | Electric potential |
| B. | Electrical conductance |
| C. | Magnetic flux |
| D. | Refractive index |
| Answer» C. Magnetic flux | |
| 260. |
Stress can be defined as quantity. |
| A. | Scalar |
| B. | Vector |
| C. | Phasor |
| D. | Tensor |
| Answer» E. | |
| 261. |
Which one of the following not a feature of Indifference Curve? |
| A. | They do not intersect each other |
| B. | They slope downwards to the right |
| C. | They are parallel to each other |
| D. | They are concave to each other |
| Answer» E. | |
| 262. |
Which one among the following components can not be developed within an "integrated circuit"? |
| A. | Diode |
| B. | Triode |
| C. | Transformer |
| D. | Transistor |
| Answer» D. Transistor | |
| 263. |
Distant objects are visible as a little out of focus in this condition |
| A. | presbiopia |
| B. | hypermetropia |
| C. | astigmatism |
| D. | myopia |
| Answer» E. | |
| 264. |
Which one of the following lenses should be used to correct the defect of astigmatism? |
| A. | Cylindrical lens |
| B. | Concave lens |
| C. | Convex lens |
| D. | Bifocal lens |
| Answer» B. Concave lens | |
| 265. |
If the angle of incidence formed on a concave mirror at a point is 30 then the angle of reflection will be: |
| A. | 15 |
| B. | 30 |
| C. | 60 |
| D. | 90 |
| Answer» C. 60 | |
| 266. |
Which one of the following is used for sun glasses? |
| A. | Pyrex glass |
| B. | Flint glass |
| C. | Crooks glass |
| D. | Crystal glass |
| Answer» D. Crystal glass | |
| 267. |
Which of the following is optical illusion? |
| A. | Rainbow |
| B. | Earthshine |
| C. | Halo |
| D. | Mirage |
| Answer» E. | |
| 268. |
Optical fibre works on the - |
| A. | principle of refraction |
| B. | total internal reflection |
| C. | scattering |
| D. | interference |
| Answer» C. scattering | |
| 269. |
A gap is left between two rails of a railway track to accommodate of the metal. |
| A. | areal expansion |
| B. | volume expansion |
| C. | liner expansion |
| D. | apparent expansion |
| Answer» D. apparent expansion | |
| 270. |
Rainbow is due to - |
| A. | absorption of sunlight in minute water droplets |
| B. | diffusion of sunlight through water droplets |
| C. | ionisation of water deposits |
| D. | refraction and reflection of sunlight by water droplets |
| Answer» E. | |
| 271. |
The following is an amplifying device : |
| A. | a transformer |
| B. | a transistor |
| C. | a diode |
| D. | a resistor |
| Answer» C. a diode | |
| 272. |
A cyclone is an engineering device that is used to - |
| A. | transport materials |
| B. | segregate particles |
| C. | control switching devices |
| D. | model fractals |
| Answer» C. control switching devices | |
| 273. |
Optical fibres are mainly used in- |
| A. | Communication |
| B. | Weaving |
| C. | Musical Instruments |
| D. | Food Industry |
| Answer» B. Weaving | |
| 274. |
In which medium, velocity of sound is maximum? |
| A. | Metals |
| B. | Air |
| C. | Water |
| D. | Polymer |
| Answer» B. Air | |
| 275. |
When a ring of metal is heated what happens to its hole? |
| A. | expands |
| B. | contracts |
| C. | it expands or contracts according to its diameter |
| D. | it expands or contracts according to its coefficient of expansion |
| Answer» B. contracts | |
| 276. |
At what temperature a body will not radiate any heat energy? |
| A. | 0 C |
| B. | 273 C |
| C. | 100 C |
| D. | -273 C |
| Answer» E. | |
| 277. |
The phenomenon of change in direction of light when it passes from one medium to another is called - |
| A. | Propagation |
| B. | Reflection |
| C. | Refraction |
| D. | Dispersion |
| Answer» D. Dispersion | |
| 278. |
Which of the following phenomenon is responsible for the movement of water in plants? |
| A. | Pressure difference |
| B. | Concentration difference |
| C. | Transpiration |
| D. | Both (2) and (3) |
| Answer» E. | |
| 279. |
The ozone layer protects us from - |
| A. | Ultra violet rays |
| B. | Radio waves |
| C. | Visual radiation |
| D. | Infrared radiation |
| Answer» B. Radio waves | |
| 280. |
'Shock-absorbers are usually made of steel as it |
| A. | is not brittle |
| B. | has lower elasticity |
| C. | has higher elasticity |
| D. | has no ductile property |
| Answer» D. has no ductile property | |
| 281. |
Plank's constant has the dimensions of |
| A. | energy |
| B. | linear momentum |
| C. | angular momentum |
| D. | force |
| Answer» B. linear momentum | |
| 282. |
A copper disc has a hole. If the disc is heated, the size of the hole - |
| A. | increases |
| B. | decreases |
| C. | No change |
| D. | first increases and than decreases |
| Answer» B. decreases | |
| 283. |
If you look into a mirror and find that the image (your reflexion) is smaller than you, then the type of the mirror is - |
| A. | plano-concave mirror |
| B. | concave mirror |
| C. | plane mirror |
| D. | convex mirror |
| Answer» E. | |
| 284. |
Heat given to a body which raises its temperature by 1 C is known as - |
| A. | water equivalent |
| B. | thermal capacity |
| C. | specific heat |
| D. | temperature gradient |
| Answer» C. specific heat | |
| 285. |
Moving electric charge produces - |
| A. | magnetic field |
| B. | sound waves |
| C. | light rays |
| D. | heat waves |
| Answer» B. sound waves | |
| 286. |
The motion of the wheels of a bullock- cart while moving on the road is an example of |
| A. | Oscillatory and rotatory motion |
| B. | Oscillatory and translatory motion |
| C. | Translatory and rotatory motion |
| D. | Translatory motion only |
| Answer» D. Translatory motion only | |
| 287. |
The mirror used by ENT specialist is: |
| A. | Plane mirror |
| B. | Concave mirror |
| C. | Convex mirror |
| D. | None of these |
| Answer» C. Convex mirror | |
| 288. |
The water from a hand pump is warm in winter because - |
| A. | our body is cold in winter and the water appears to be warm |
| B. | the temperature inside the Earth is higher than the atmospheric temperature |
| C. | the pumping process causes friction which warms up the water |
| D. | inside water comes out and absorbs heat from the environment |
| Answer» C. the pumping process causes friction which warms up the water | |
| 289. |
In a refrigerator what produces the cooling? |
| A. | The ice which deposits on the freezer |
| B. | The sudden expansion of a compressed gas |
| C. | The evaporation of a volatile liquid |
| D. | None of these |
| Answer» E. | |
| 290. |
For which type of motion, the distance time graph is not a straight line and can be any kind of curve? |
| A. | Uniform motion |
| B. | Circular motion |
| C. | Non-uniform motion |
| D. | Linear motion |
| Answer» D. Linear motion | |
| 291. |
The gas used in a refrigerator is - |
| A. | cooled down on flowing |
| B. | heated up on flowing |
| C. | cooled down when compressed |
| D. | cooled down when expanded |
| Answer» E. | |
| 292. |
When two semiconductors of p-and n- type are brought in contact, they form p-n junction which acts like a/an |
| A. | Conductor |
| B. | Oscillator |
| C. | Rectifier |
| D. | Amplifier |
| Answer» D. Amplifier | |
| 293. |
We always see the same lace of the moon, because |
| A. | It is smaller than the earth |
| B. | It revolves on its axis in a direction opposite to that of the earth |
| C. | It takes equal time for revolution around the earth and rotation on its own axis |
| D. | It rotates at the same speed as the earth around the sun |
| Answer» D. It rotates at the same speed as the earth around the sun | |
| 294. |
The working principle of a 'Washing machine' is : |
| A. | centrifugation |
| B. | dialysis |
| C. | reverse osmosis |
| D. | diffusion |
| Answer» B. dialysis | |
| 295. |
The washing machine works on the principle of - |
| A. | Dialysis |
| B. | Diffusion |
| C. | Reverse osmosis |
| D. | Centrifugation |
| Answer» E. | |
| 296. |
The working principle of a washing machine is : |
| A. | centrifugation |
| B. | dialysis |
| C. | reverse osmosis |
| D. | diffusion |
| Answer» B. dialysis | |
| 297. |
During the motion of a projectile fired from the earth surface, . |
| A. | its kinetic energy remains constant |
| B. | its momentum remains constant |
| C. | vertical component of its velocity remains constant |
| D. | horizontal component of its velocity remains constant |
| Answer» E. | |
| 298. |
A larger force on a rotating body results in larger . |
| A. | Mass |
| B. | Torque |
| C. | Axis of rotation |
| D. | Centre of mass |
| Answer» D. Centre of mass | |
| 299. |
'Kilowatt-hour' is the unit of - |
| A. | potential difference |
| B. | electric power |
| C. | electric energy |
| D. | electric potential |
| Answer» D. electric potential | |
| 300. |
When a particle and an antiparticle come in contact with each other, they |
| A. | repell each other |
| B. | annihilate each other |
| C. | go undisturbed |
| D. | spin about a common axis |
| Answer» C. go undisturbed | |