Question # 1

One of the main function of the earth's ozone layer is to:

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Prevent global warming

Filter out ultraviolet rays

Absorb pollution

All of above

In winter an iron pipe feel colder than a wooden window. this is because wood is:

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Conductor

Non conductor

Semi conductor

Not a solid while iron is a solid

Which one of the following is a water soluble vitamin?

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Niacin

Ascorbic acid

trypsin

riboflavin

The electro-cardiograph was invented by

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B.F Goodrich

Gottlieb Daimler

Karl Benz

William Einthoven

The largest natural number which exactly divides the product of any four consecutive natural numbers, is

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6

12

24

120

It is possible to recognize a person in the dark by simply hearing his unique voice. it is because of the:

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Pitch

Frequency

Time period

Quality

It is observed that the total pressure exerted by air on the man of average size is around 14.7 lb wt. per square inch. but the man feels quite comfortable .it is because of:

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An equal and opposite pressure acts from inside

of the height of a man

of gravity

none of these

An area of microbiology that is concerned with the occurrence of disease in human population is

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Immunology

Parasitology

Epidemiology

None of these

The H.C.F. of 1095 and 1168 is:

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37

73

43

83

Tides are generated by

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The movement of ships in the oceans

The gravitational effect of moon and sun on our earth

The movement of the earth around the sun

None of these

Four children A, B, C and D divide a bag of sweets. A takes 1/3 of them, B 2/5the of the remainder and the rest is equally shared between C and D. What fraction of the sweets did C or D get ?

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1/5

1/17

1/6

1/4

How many 1/8 s are there in 37 1/2 ?

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300

400

500

None of these

The average temperature form Monday to Thursday is 48^O and form Tuesday to Friday is 52^O. If the temperature on Monday is 42^O, what was it on Friday ?

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52^O

55^O

58^O

51^O

If a/a+b = 17/23, what is a+b/a-b equal to ?

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11/23

17/32

23/11

23/17

The income of a company increases 20% per annum. If its income is Rs. 26,64,000 in the year 1999 what was its income in the year 1997 ?

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Rs. 17,50,000

Rs. 16,50,000

Rs. 18,50,000

None of these

In an examination, 1100 boys and 900 girls appeared. 50% of the boys and 40% of the girls passed the examination. The percentage of candidates failed is:

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45

45.5

54.5

59.2

In an examination a student was asked to find (3/14) of a certain number. By mistake he found (3/4) of it. His answer was 150 more than the correct answer. The given number is

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180

240

280

290

Vaccination is synonymous with......... immunity.

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Natural active

Artificial passive

Artificial active

None of these

Protein are made up of

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Polynucleotide

Polypeptide

Oxyacetylene

None of these

What is the difference between the largest and the smallest fractions 5/8, 21/35, 9/16 and 6/7 ?

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33/112

11/37

13/41

9/35

How many four-digit numbers have only even digits ?

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96

128

256

500

625

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