McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) , Uncategorized topics .
| 201. |
The force which tries to bring the body back to its mean position is called |
| A. | deforming force |
| B. | restoring force |
| C. | gravitational force |
| D. | buoyant force |
| Answer» B. restoring force | |
| 202. |
In which of the following media will sound travel the fastest? |
| A. | solid |
| B. | both solid and liquid |
| C. | liquid |
| D. | gas |
| Answer» A. solid | |
| 203. |
Sound waves in air are _____ waves. |
| A. | longitudinal |
| B. | radio |
| C. | transverse |
| D. | electromagnetic |
| Answer» A. longitudinal | |
| 204. |
Sound waves cannot pass through |
| A. | a solid-liquid mixture |
| B. | an ideal gas |
| C. | a liquid-gas mixture |
| D. | a perfect vacuum |
| Answer» D. a perfect vacuum | |
| 205. |
Out of the following, which frequency is not clearly audible to the human ear? |
| A. | 30 Hz |
| B. | 30,000 Hz |
| C. | 300 Hz |
| D. | 3000 Hz |
| Answer» B. 30,000 Hz | |
| 206. |
The distance between two consecutive crests is L, then the wavelength is given by |
| A. | L/2 |
| B. | 2 L |
| C. | 4 L |
| D. | L |
| Answer» D. L | |
| 207. |
The frequency of a wave is 5 Hz. It refers to (type of wave) |
| A. | ultrasonics |
| B. | microwaves |
| C. | infrasonics |
| D. | radio waves |
| Answer» C. infrasonics | |
| 208. |
A pulse is a wave |
| A. | of high duration |
| B. | of short duration |
| C. | which travels in vacuum only |
| D. | which travels in solids only |
| Answer» B. of short duration | |
| 209. |
Sound travels fastest in |
| A. | water |
| B. | steel |
| C. | air |
| D. | kerosene oil |
| Answer» B. steel | |
| 210. |
Which of the following types of waves is different from others? |
| A. | Light waves |
| B. | X-rays |
| C. | Radio waves |
| D. | Sound waves |
| Answer» D. Sound waves | |
| 211. |
Waves produced by supersonic jet planes are |
| A. | shock waves |
| B. | seismic waves |
| C. | infrasonics |
| D. | none of these |
| Answer» A. shock waves | |
| 212. |
Echo is produced due to |
| A. | reflection of sound |
| B. | refraction of sound |
| C. | resonance |
| D. | none of these |
| Answer» A. reflection of sound | |
| 213. |
SONAR is based on the principle of |
| A. | echo |
| B. | resonance |
| C. | reverberation |
| D. | any one of the above |
| Answer» A. echo | |
| 214. |
The audible range of frequency is |
| A. | 20 Hz to 20,000 Hz |
| B. | 40 Hz to 40,000 Hz |
| C. | 60 Hz to 60,000 Hz |
| D. | 10 Hz to 20,000 Hz |
| Answer» A. 20 Hz to 20,000 Hz | |
| 215. |
Which of the following frequencies of sound cannot be heard by human beings? |
| A. | 5 Hz |
| B. | 20 Hz |
| C. | 400 Hz |
| D. | 1000 Hz |
| Answer» A. 5 Hz | |
| 216. |
The mirror used in automobiles to see the rear field of view is |
| A. | concave |
| B. | convex |
| C. | plane |
| D. | none of these |
| Answer» B. convex | |
| 217. |
The mirror used in search lights is |
| A. | concave |
| B. | convex |
| C. | plane |
| D. | none of these |
| Answer» A. concave | |
| 218. |
Shaving mirrors are |
| A. | convex mirrors |
| B. | concave mirrors |
| C. | plane mirrors |
| D. | none of these |
| Answer» B. concave mirrors | |
| 219. |
The laws of reflection are true for |
| A. | the plane mirror only |
| B. | the concave mirror only |
| C. | the convex mirror only |
| D. | all reflecting surfaces |
| Answer» D. all reflecting surfaces | |
| 220. |
When the object is at focus of a concave mirror, the image is formed at |
| A. | focus |
| B. | centre of curvature |
| C. | within focus |
| D. | infinity |
| Answer» D. infinity | |
| 221. |
Which of the following is a non-luminous body? |
| A. | fire |
| B. | sun |
| C. | stars |
| D. | earth |
| Answer» D. earth | |
| 222. |
A body which allows most of the light to pass through it is called a |
| A. | transparent body |
| B. | opaque body |
| C. | translucent body |
| D. | none of these |
| Answer» A. transparent body | |
| 223. |
During the 19th century, light was considered to be a stream of particles called |
| A. | atoms |
| B. | electrons |
| C. | corpuscles |
| D. | quantas |
| Answer» C. corpuscles | |
| 224. |
Who first proposed that light was wave-like in character? |
| A. | Huygens |
| B. | Newton |
| C. | Young |
| D. | Maxwell |
| Answer» A. Huygens | |
| 225. |
The screen behind the eye lens is called the |
| A. | iris |
| B. | ciliary muscle |
| C. | retina |
| D. | pupil |
| Answer» C. retina | |
| 226. |
The middle vascular coat that darkens the eye chamber and prevents refraction by absorbing the light rays is |
| A. | choroid |
| B. | sclera |
| C. | retina |
| D. | cornea |
| Answer» A. choroid | |
| 227. |
The amount of light entering the eye is controlled by the |
| A. | sclera |
| B. | cornea |
| C. | iris |
| D. | crystalline lens |
| Answer» C. iris | |
| 228. |
The eye lens is a |
| A. | transparent double-convex lens |
| B. | transparent double-concave lens |
| C. | transparent concavo-convex lens |
| D. | none of these |
| Answer» A. transparent double-convex lens | |
| 229. |
The eye lens contains a watery liquid called the |
| A. | aqueous humour |
| B. | peroxide |
| C. | vitreous humour |
| D. | none of these |
| Answer» A. aqueous humour | |
| 230. |
Long-sightedness is caused by the eyeball being too short. It can be corrected by the use of a |
| A. | convergent lens |
| B. | plane mirror |
| C. | divergent lens |
| D. | none of these |
| Answer» A. convergent lens | |
| 231. |
A lens which is thicker in the middles and thinner at the edges is called a _____ lens. |
| A. | convex |
| B. | concave |
| C. | cylindrical |
| D. | none of these |
| Answer» A. convex | |
| 232. |
A lens which is thinner at the middles and thicker at the edges is called a _____ lens. |
| A. | convex |
| B. | concave |
| C. | cylindrical |
| D. | none of these |
| Answer» B. concave | |
| 233. |
Which of the following lens is used to minimise hypermetropia? |
| A. | convex lens |
| B. | concave lens |
| C. | cylindrical lens |
| D. | none of these |
| Answer» A. convex lens | |
| 234. |
Most of the refraction of light takes place in the |
| A. | iris |
| B. | cornea |
| C. | pupil |
| D. | retina |
| Answer» B. cornea | |
| 235. |
When the light is very bright, |
| A. | the iris makes the pupil expand |
| B. | the iris makes the pupil contract |
| C. | the iris and the pupil remain as they are |
| D. | none of these |
| Answer» B. the iris makes the pupil contract | |
| 236. |
Who discovered by his experiments with glass prisms that white light consists of seven colours? |
| A. | Newton |
| B. | Faraday |
| C. | Maxwell |
| D. | Young |
| Answer» A. Newton | |
| 237. |
Autosomes in humans are paired in |
| A. | 21 pairs |
| B. | 24 pairs |
| C. | 22 pairs |
| D. | 16 pairs |
| Answer» C. 22 pairs | |
| 238. |
The light which refracts most while passing through a prism is |
| A. | red |
| B. | violet |
| C. | indigo |
| D. | yellow |
| Answer» B. violet | |
| 239. |
The planet having the largest number of satellites amongst the following is |
| A. | Jupiter |
| B. | Saturn |
| C. | Uranus |
| D. | Mars |
| Answer» B. Saturn | |
| 240. |
In the absence of his tone proteins in prokaryotes, the an ioinic charges of each inter nucleotide phosphate in DNA is neutralized by |
| A. | phospholipids |
| B. | polyamines |
| C. | polysaccharides |
| D. | glycelipids |
| Answer» B. polyamines | |
| 241. |
Phagocytosis and pinocytosis are collectively termed as |
| A. | endocytosis |
| B. | suspension feeding |
| C. | omnivores |
| D. | mucous trap |
| Answer» A. endocytosis | |
| 242. |
Which one of the following is called pacemaker of the heart? |
| A. | SA node |
| B. | AV node |
| C. | Chordae tendinae |
| D. | AV septum |
| Answer» A. SA node | |
| 243. |
The life span of human WBCs is normally |
| A. | 12-13 days |
| B. | 80-90 days |
| C. | 100-120 days |
| D. | 20-30 days |
| Answer» A. 12-13 days | |
| 244. |
Oxygenated bold is carried by |
| A. | pulmonary vein |
| B. | pulmonary artery |
| C. | hepatic portal vein |
| D. | renal vein |
| Answer» A. pulmonary vein | |
| 245. |
The reserve food in fungal cell is |
| A. | glucose |
| B. | fructose |
| C. | glycogen |
| D. | starch |
| Answer» C. glycogen | |
| 246. |
Trypanosoma is |
| A. | bacteria |
| B. | fungus |
| C. | algae |
| D. | protozoa |
| Answer» D. protozoa | |
| 247. |
Seeds are called the products of sexual reproduction due to |
| A. | it gives rise to new plants |
| B. | formation by fusion of pollen tubes |
| C. | it can survive for longer periods |
| D. | are formed by fusion of gametes |
| Answer» D. are formed by fusion of gametes | |
| 248. |
The most essential organ for fertilization is |
| A. | juicy fruit |
| B. | green sepals |
| C. | coloured petals |
| D. | mature ovule |
| Answer» D. mature ovule | |
| 249. |
BCG vaccine is used to protect a child from |
| A. | polio |
| B. | plague |
| C. | dengue |
| D. | tuberculosis |
| Answer» D. tuberculosis | |
| 250. |
Bulliform cells are present in |
| A. | lower epidermis of monocot leaves |
| B. | upper epidermis of monocot leaves |
| C. | dicot stem |
| D. | upper epidermis of dicot leaves |
| Answer» A. lower epidermis of monocot leaves | |
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