(CAR) EDS - Randomn

Question 1

Astronauts cannot talk to each other on the surface of the moon coz

Answer 1

Sound waves cannot travel through vaccum

Question 2

____ is the instrument that determines specific gravity of liquids

Answer 2

Hydrometer

Question 3

Convex lenses are used for the correction of

Answer 3

Long-sightedness

Question 4

A transformer is used for

Answer 4

Increase or Decrease AC voltage

Question 5

The Stones formed in Human Kidney consists mostly of

Answer 5

Calcium oxalate

Question 6

Most of the explosions in mines occur due to the mixing og

Answer 6

Methane with Air

Question 7

The blood glucose level is commonly expressed as

Answer 7

Milligram per decilitre

Question 8

When a CD is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of phenomenan of

Answer 8

Reflection and Diffraction

Question 9

Ia a U-238 nucleus splits in two identical parts, the two nuclie so produced will be

Answer 9

RadioActive

Question 10

_____ type of radiation is absorbed by the upper layer of the atmosphere

Answer 10

Infrared

Question 11

After long periods of use, a gray spot develops on the inside of a bulb. this is coz

Answer 11

The tungsten filament evaporates and collects here

Question 12

Approxi, how many times each day do our heart valves open and close normally?

Answer 12

100,000 times

Question 13

A nuclear reactor harnesses nuclear energy by?

Answer 13

Controlled chain reaction

Question 14

_____, a raw material, is used in the manufacture of foam used in mattresses, cushions, etc

Answer 14

Phenol

Question 15

Permanent magnet can be made from

Answer 15

Cobalt

Question 16

Atmospheric pressure exerted on the earth is due to the

Answer 16

Gravitational Pull

Question 17

Quantity of fresh air required for a man is

Answer 17

1000 cubic feet of air for every 20 mins

Question 18

Oxygen comes from

Answer 18

CO2

Question 19

_____ metal pollutes the air of a city having large number of automobiles

Answer 19

lead

Question 20

The snow on the mountains does not melt all at once when it is heated b the sun because

Answer 20

It reflects most of the heat from the sun

Question 21

In_____ the blood formed in the human body.

Answer 21

Bone Marrow

Question 22

the smallest of the matter is

Answer 22

Quark

Question 23

Trachoma is a disease of

Answer 23

eye. (Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids.)

Question 24

Sodium depletion occurs in excessive sweating, and cannot be corrected by drinking water alone. when corrected it may lead to

Answer 24

• Muscle Cramps
• Loss of energy
• Fatigue and Faintness

Question 25

The heart of a normal adult human being weighs about

Answer 25

300 grams

Question 26

The part of the body directly affected by pneumonia is

Answer 26

Respiratory system

Question 27

Haemoglobin in the blood is a complex protien rich in

Answer 27

Iron

Question 28

Amino Acids are a product of the digestion of

Answer 28

Proteins

Question 29

____ food provide the largest number of Kcal of energy

Answer 29

Margarine

Question 30

Avg life of a red blood cell

Answer 30

120 days

Question 31

The amount of Haemoglobin presend in blood is about ____. what % is considered as normal

Answer 31

- 15gm per 100ml | - over 90 %

Question 32

Other name of Vitamin C

Answer 32

Ascorbic Acid

Question 33

Barometer invented by

Answer 33

Evangelista Torricelli

Question 34

Telescope invented by

Answer 34

Galileo

Question 35

Aeroplane invented by

Answer 35

The Wright brothers had invented the first successful airplane. (On December 17, 1903, Wilbur and Orville Wright made four brief flights at Kitty Hawk with their first powered aircraft.)

Question 36

Helicopter invented by

Answer 36

Louis Charles Breguet was a French aircraft designer and builder, one of the early aviation pioneers.

Question 37

Barthélemy Thimonnier?

Answer 37

Barthélemy Thimonnier, was a French inventor, who is attributed with the invention of the first sewing machine that replicated sewing by hand

Question 38

Earth's crust have the abundant reserves of

Answer 38

Silicon, Oxygen and Aluminium

Question 39

Pure gold is

Answer 39

24 carat

Question 40

One horse power is equal to

Answer 40

746 watts

Question 41

Dynamo is a device that converts

Answer 41

Mechanical energy into electrical energy

Question 42

Total internal reflection occurs when light travels from

Answer 42

A denser medium to a rarer medium

Question 43

Heat from the sun is recieved by the earth through

Answer 43

Radiation

Question 44

_____ element is excesively used in electronics

Answer 44

Silicon

Question 45

Which one of the following elements is extensively used in electronics

Answer 45

Acetylene and Oxygen

Question 46

Largest in the human body

Answer 46

Nerve Cell. (A neuron (also known as a neurone or nerve cell) is a cell that carries electrical impulses. Neurons are the basic units of the nervous system and its most important part is the brain.)

Question 47

A thermostat is

Answer 47

A device used to maintain a constant temperature of a water bath or an oven

Question 48

The time interval b/w two beats of a normal human heart is

Answer 48

1 Sec

Question 49

Nitrogen is prepared in the laboratory by heating

Answer 49

the mixture of almunium chloride and sodium nitrate

Question 50

The material used for bleaching paper pulo is

Answer 50

Sodium