Civil Service Preliminary Paper-1 Previous Year Solved Questions for the year 2011


91) When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because
(a)  Water from soil cannot rise to aerial parts
(b)  Roots are starved of energy
(c)  Tree is infected by soil microbes
(d)  Roots do not receive oxygen for respiration


92) What is the difference between a CFL and an LED lamp ?
1.   To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
2.   The average life span of a CFL is much longer than that of an LED lamp.
3.   A CFL is less energy-efficient as compared to an LED lamp.

Which of the statements given above is/are correct ?
(a)  1 only
(b)  2 and 3 only
(c)  1 and 3 only
(d)  1, 2 and 3


93) Recently, "oilzapper" was in the news. What is it ?
(a)  It is an eco-friendly technology for the remediation of oily sludge and oil spills
(b)  It is the latest technology developed for under-sea oil exploration
(c)  It is a genetically engineered high biofuel-yielding maize variety
(d)  It is the latest technology to control the accidentally caused flames from oil wells


94) A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD ?
1.   DVD supports Standard Definition video while BD supports High Definition video.
2.   Compared to a DVD, the BD format has several times more storage capacity.
3.   Thickness of BD is 2.4 mm while that of DVD is 1.2 mm.

Which of the statements given above is/are correct ?
(a)  1 only
(b)  1 and 2 only
(c)  2 and 3 only
(d)  1, 2 and 3



95) What is the difference between Bluetooth and Wi-Fi devices ?
(a)  Bluetooth uses 2.4 GHz radio frequency band, whereas Wi-Fi can use 2.4 GHz or 5 GHz frequency band
(b)  Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for ' Wireless Wide Area Networks (WWAN) only
(c)  When information is transmitted between two devices using Bluetooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other
(d)  The statements (a) and (b) given above are correct in this context


96) A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed. The objective of this is
(a)  To make it pest-resistant
(b)  To improve its taste and nutritive qualities
(c)  To make it drought-resistant
(d)  To make its shelf-life longer


97) Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1.   The orbit is geosynchronous.
2.   The orbit is circular.
3.   The orbit lies in the plane of the Earth's equator.
4.   The orbit is at an altitude of 22,236 km.

Select the correct answer using the codes given below :
(a)  1, 2 and 3 only
(b)  1, 3 and 4 only
(c)  2 and 4 only
(d)  1, 2, 3 and 4


98) At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us ?
1.   It is possible to know the pedigree of livestock.
2.   It is possible to understand the causes of all human diseases.
3.   It is possible to develop disease-resistant animal breeds.

Which of the statements given above is/are correct ?
(a)  1 and 2 only
(b)  2 only
(c)  1 and 3 only
(d)  1, 2 and 3



99) In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material?
1.   Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
2.   Bioasphalt can be made from non-renewable resources.
3.   Bioasphalt can be made from organic waste materials.
4.   It is eco-friendly to use bioasphalt for surfacing of the roads.

Which of the statements given above are correct ?
(a)  1, 2 and 3 only
(b)  1, 3 and 4 only
(c)  2 and 4 only
(d)  1, 2, 3 and 4


100) What is "Virtual Private Network" ?
(a)  It is a private computer network of an organization where the remote users can transmit encrypted information through the server of the organization
(b)  It is a computer network across a public internet that provides users access to their organization's network while maintaining the security of the information transmitted
(c)  It is a computer network in which users can access a shared pool of computing resources through a service provider
(d)  None of the statements (a), (b) and (c) given above is a correct description of Virtual Private Network


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