Every day science css-2012 objective

Marks 50 time 80 mins



1) a scientific method will seek to explain natural events and make useful prediction in

A) a haphazard manner B) a manner design to fit the theorist,s or experimenter,s bias
C) a consistently reproducible manner D) none of these



2) “truth is the sought for its own sake. And those who are engaged upon the quest for anything for its own sake are notinterested in other things. Finding the truth is difficult and the road to it is rough.” This was stated by which key figure in the development of scientific method in the 11th century?


A) aristotle B) ibn al haytham C) plato D) none of these



3) abu abdullah muhammad bin musa al-khwarizmi is famous for writing the
“kitab al jaber wal muqabla” in which he

A) presented the first systematic solution of linear and quadratic equations
B) delineated methods of oppression & competition
C) wrote the laws of optics D) none of these



4) gallieo gallies was perescuted by the catholic church for suspicon of holding the view that:




A) objects of different masses fell at the same velocity
B) the sun revolves arounds the moon
C) the earth was probably not the centre of the universe
D) none of these


5) the proliferation of education and dissemination of knowledge in the last two centuries has led to a faith in science that:


A) causes human beings to turn on other human beings
B) is the main cause of poverty and war
C) leads to oppression of education
D) none of these


6) science attempts to:


A) explains how the universe works by dicovering the laws regulating everything around us
B) use dicovered laws to engineer new devices
C) both a & b
D) none of these



7) ibn zuhr, the author of al taisir, is known as:



A) the father of experimental surgery
B) the founder of calculus
C) a biographer of provincial governors
D) none of these


8) ibn khaldun’s muqqadimah is regarded by many as:


A) the first work dealing with a philosophy of history
B) a minor footnote in his writings
C) a well documented tale of his trial
D) none of these



9) a physical, mathematical or logical representation of a natural phenomenon is called


A) phenomenal
B) a scientific model
C) a theoratical postulate
D) none of these



10) issac newton and gottfried leibniz working independently in the 17th cenury laid the foundation of classical physics and are known as fathers of



A) astrology
B) relativistic theory
C) integral & differential calculus
D) none of these



11) a light year is


A) a year devoid of heavy rainfall


B) the time taken by light to be generated & propagated from the centre of the sun to our earth
C) the distance covered by light in one of our solar years
D) none of these


12) our sun is classified as
A) a blue giant
B) a yellow dwarf
C) supernova
D) none of these


13) the sun produces most of its energy by:


A) nuclear fusion which involves converting “h” to “he”
B) nuclear fission involving the burning of uranium & plutonium
C) nuclear fission involving the combining of uranium and palladium
D) none of these

14) which of the following is the correct ordering of the inner planets according to their roximity to the sun


A) jupiter,saturn,uranus,neptune
B) phobos,deimes,europe,tias
C) mercury,venus,earth,mars
D) none of these


15) how long does our earth takes to turn about its axis


A) one hour
B) 23 hours
C) 24 hours
D) none of these


16) tides are generated by


A) the movements of ships in the oceans
B) the gravitational effect of moon and sun on our earth
C) the movements of the earth around the sun
D) none of these


17) seasons are generated by


A) the movement of sun around coabes of the milky way
B) the movement of the earth around the sun
C) relativistic quantium -------------------------
D) none of these


18) although the mass of a man on moon remains same as on the earth,he will


A) be much happier there
B) weigh one sixth as much
C) weigh twice as much
D) none of these


19) if we are at see level our atmosphere presses down on us with a pressure of:


A) 1 fps
B) 14.3 fps
C) 35.8 fps
D) none of these

an Imperial system of units based on the foot, pound, and second

20) the efficiency of a machine is


A) always greater than 100%
B) always less than 100%
C) always 100%
D) none of these



21) a material with high elasticity


A) does not returns to its origional shape upon being stretched and then released
B) returns as close as possible to its origional shape upon being stretched and then released
C) can be stretchedto infinite distances
D) none of these



22) matter and energy


A) can be converted from one to the other
B) when taken together , converted in all processess in a closed system
C) both a & b
D) none of these


23) electric current


A) flows from a higher potential to lower potential
B) is caused by flow of electrons
C) both a & b
D) none of these


24) electricity and magnetism are


A) two faces of same force
B) always opposed to each other
C) both a & b
D) none of these



25) ball bearing help wheels and other rotating objects


A) move without consuming any energy
B) rotate more easily and with less friction
C) both a & b
D) none of these


26) photography works by



A) capturing the souls of the objects being photographed
B) capturing light reflected from the object being photographed
C) both a & b
D) none of these


27) arthur c.clarke, the famous science fiction author, while working as a radio operator in the british army in world war-ii


A) proposed buliding a space elevator from carbon mono-filaments
B) postulated the existence of extra-terrestrial artifacts on the moon
C) proposed that a network of satellites in stationary orbit at very high altitudes arounds the earth be used to bounce communication signals all over the world
D) none of these

28) the sino pakistani jf-17 thunder aircraft:
A) is a commercial transport aircraft
B) is neither built nor assembled in pakistan
C) has no stealth features in its engine inlets or elsewhere
D) none of these


29) communication satellites are in


A) geostationary orbit
B) geosynchronous orbit
C) semisynchronous orbit
D) none of these



30) ram of a computer is refers to :

A) read access memory
B) right access memory
C) random access memory
D) none of these

31) which of the following is responsible for transporting oxygen in the blood


A) white blood cells-------wbc
B) neutrophills
C) red blood cells---------rbc
D) none of these


32) which of the following is true for hormones?



A) all proteins are hormones
B) all hormones are proteins
C) all hormones are amino acids
D) none of these


33) prokaryotes have which of the following structures?

A) nucleus
B) mitochundria
C) chloroplast
D) none of these


34) diversity in which of the following groups is not due to artificial slection?
A) wheat
B) dogs
C) --------------------------
D) none of these



35) arachnophobia is refer to a fear of


A) spiders
B) snakes
C) bats
D) none of these
36) which of the following is a part of DNA?


A) dgtp
B) dadp
C) dtmp
D) none of these


37) in humans the “y” chromosome is passed to the next generation from
A) father to son
B) mother to son
C) father to daughter
D) none of these


38) which of the following is a mammal?


A) blue tuna
B) sword fish
C) whale
D) none of these


39) female ova are:
A) haploid
B) diploid
C) triploid
D) none of these

40) which of the following is not a part of DNA?
A) thymine
B) adenine
C) ribose
D) none of these

41) which of the following is a labeled as “good cholesterol” for humans?
A) high-density lipoprotein--------------hdl
B) low density lipoprotein--------------- ldl
C) very low density lipoprotein ------vldl
D) none of these



42) which of the following is a infectious disease
A) deafness
B) blindness
C) baldness
D) none of these



43) which of the following is a non essential amino acid?
A) almine
B) methenamine
C) tyrosine
D) none of these

http://www.dietaryfiberfood.com/amin...mino-acids.php



44) starting from higher choose the correct sequence of molecules in order of energy yeilding


A) sugar,fats,protein
B) protein,sugar,fats
C) fats,sugar,protein
D) none of these


45) which of the following is not a part of protein?
A) glutamic acid
B) sulphuric acid
C) aspartic acid
D) none of these


46) the highest source of omega-3 fatty acid is
A) fish oil
B) corn oil
C) sunflower oil
D) none of these

47) which of the following gas is essential for human


A) carbon dioxide
B) nitrogen
C) oxygen
D) none of these


48) proteins are made up of

A) polynucleotide
B) polypeptide
C) polyacetylene
D) none of these

49. Schezophrenia is a
Mental desease

50. Which of the following are founded in the nucleus?


a) lysosomes
b) |chromosomes
c) ribosomes
d) none of these

Correct following

20) the efficiency of a machine is


A) always greater than 100%
B) always less than 100%C)
always 100%
D) none of these

Correct #30
Ram is not read access memory
It is Random access memory

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#28
Correct answer is C

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__________________
Whatever the mind of man can conceive and believe, it can achieve. –Napoleon Hill

http://en.wikipedia.org/wiki/Ideal_machine

I think efficiency is 100% because ideal and simple machines have 100% efficiency ,Real devices has less then 100%

__________________
"Wa tu izzu man-ta shaa, wa tu zillu man-ta shaa"

I think option A is correct here. not sure though but read it somewhere as geostationary orbit.

__________________
Whatever the mind of man can conceive and believe, it can achieve. –Napoleon Hill

you are right dear

please tell me about RAM and ROM .because I am oblivious of computer terms .

__________________
"Wa tu izzu man-ta shaa, wa tu zillu man-ta shaa"

Sadia the link you have provided is about an Ideal machine where there is no power loss which is not possible in real.
Here is an excerpt for you.

Mechanical efficiency measures the effectiveness of a machine in transforming the energy and power that is input to the device into an output force and movement. Efficiency is measured as a ratio of the measured performance to the performance of an ideal machine:

Efficiency = Measured Performance / Ideal Performance

Because the power transmission system or mechanism does not generate power, its ideal performance occurs when the output power equals the input power, that is when there are no losses. Real devices dissipate power through friction, part deformation and wear.

The ideal transmission or mechanism has an efficiency of 100%, because there is no power loss. Real devices will have efficiencies less than 100% because rigid and frictionless systems do not exist. The power losses in a transmission or mechanism are eventually dissipated as heat.

Source: http://en.wikipedia.org/wiki/Mechanical_efficiency

ROM is for Read-Only Memory. This is something which once burnt cant be altered later on and they can be read only. You must have read the name CD-ROM . That is a compact disc to which data has been burnt and that can be read only. Same goes for different computer chips responsible for operation of different machines.

Now RAM is random access memory. When you click a program the cpu loads it from hard disk to ram and from RAM it is being run. You must have experienced that that less ram and many programs open result in sluggish performance of computer and vice versa.

For more study follow these links.

http://en.wikipedia.org/wiki/Random-access_memory

http://en.wikipedia.org/wiki/Read-only_memory

__________________
Whatever the mind of man can conceive and believe, it can achieve. –Napoleon Hill

ok let me tell the efficiency of simple machines .They are 100%. Why?

__________________
"Wa tu izzu man-ta shaa, wa tu zillu man-ta shaa"

ans of 1st q is C

I think Engineering students do not hesitate to accept that "Efficiency of a machine is less than 100 %"

4 years we have read it again and again in different books of Engineering