Everyday Science Test 5

Total Questions: 25

1 - Silicon is a

A ) Semi-conductor ✅
B ) Insulator
C ) Superconductor
D ) Conductor

2 - The speed of sound is

A ) 300 meter per second
B ) 315 meter per second
C ) 343 meter per second ✅
D ) 362 meter per second

3 - For sending sound waves at large distance. Which waves are used

A ) Infrared waves
B ) Radio waves ✅
C ) Light waves
D ) X-waves

4 - William Harvey's researches related to

A ) Functioning of heart muscle
B ) Heart transplant surgery
C ) Bacterial growth
D ) Blood circulation ✅

5 - Video camera is used to convert

A ) Heat into x-rays
B ) Sound into electrical signals
C ) Picture into electrical signals ✅
D ) Electrical signals into pictures

6 - The range of a 100 meter high T.V transmitter Ariel is about

A ) 10 km
B ) 20 km
C ) 30 km ✅
D ) 50 km

7 - The waves used for sending signals to the satellite from ground station are

A ) X-rays
B ) Sound waves
C ) Microwaves ✅
D ) Ultraviolet rays

8 - A mobile phone sends and receives messages through

A ) Sound waves
B ) Microwaves
C ) Ultraviolet waves
D ) Radio waves ✅

9 - The procedure of crushing the gallstones and kidney stone by laser is called

A ) MRI
B ) Kidney surgery
C ) Angeography
D ) Lithotropsy ✅

10 - Three dimensional image formed by laser is called

A ) Photograph
B ) Hologram ✅
C ) Two dimensional sketch
D ) Photocopy

11 - Optical fibers are the fine strands of

A ) Glass ✅
B ) Iron
C ) Calcium
D ) Mercury

12 - The satellites which revolves in such an orbit,so that they move with earth rotation are called

A ) Geo satellite
B ) Stationary Satellites
C ) Earth-space satellites
D ) Geo-stationary Satellites ✅

13 - Radar transmits short pulses of high frequency, which are called

A ) Infrared waves
B ) Radio waves ✅
C ) Ultraviolet rays
D ) Sound waves

14 - Hydroponics is the art of

A ) Scientific description of the water of earth
B ) Growing plants without soil(in water mixed with chemicals) ✅
C ) Detection of soundwaves in water
D ) Motion and pressure of liquids

15 - To find the hidden secrets under the water,the ships and submarines use the

A ) Radiation system
B ) Sonar system ✅
C ) X-ray system
D ) Radiation system

16 - Recording of brain waves from outer surface of head is called

A ) E. C. G
B ) MRI
C ) C.T.scan
D ) E. E. G ✅

17 - Ball bearings are used in cycles,scooters etc. to

A ) Reduce the friction between the wheel and the axle ✅
B ) Increase the friction between the wheel and the axle
C ) Reduce the friction between ground and the wheel
D ) None of these

18 - Steel is more elastic than rubber because

A ) Its density is high
B ) It is a metal
C ) Ratio of stress to strain is more ✅
D ) Ratio of stress to strain is less

19 - What does make the blood look red?

A ) Red corpuscles
B ) Haemoglobin ✅
C ) Plasma
D ) Certain secretions

20 - In railway tracks, a small gap is left between the rails

A ) To allow for the expansion during heat ✅
B ) To save the cost of metal
C ) To permit the shrinkage of metal
D ) None of these

21 - Friction can be reduced by changing over from

A ) Sliding to rolling ✅
B ) Rolling to sliding
C ) Potential energy to kinetic energy
D ) Dynamic to static

22 - Ice blocks are covered with sawdust

A ) To prevent the dust from collecting on the ice
B ) Because ice being cold cannot be lifted with bare hands
C ) To provide necessary insulation from heat ✅
D ) None of these

23 - The acid used in a car battery is

A ) Hydrochloric acid
B ) Nitric acid
C ) Sulphuric acid ✅
D ) Carbonic acid

24 - While dusting a carpet,we give a sudden jerk or beat it with a stick, because

A ) Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away
B ) Inertia of motion removes the dust ✅
C ) The jerk compensates for the force of adhesive between the dust and the carpet and the dust is removed
D ) None of the above

25 - After drinking contaminated water, you would be most apt to develop symptoms of

A ) Malaria
B ) Typhoid fever ✅
C ) Yellow fever
D ) Schistosomiasis