SSC-JUNIOR ENGINEER (Civil & Structural) Online Exam 2016 (Part-IV)

Total Questions: 50

21. Radio waves transmitted from the earth are reflected back to the earth by which layer of the atmosphere?

Correct Answer: D. Ionosphere
Solution:Radio waves have wavelength 0.1-600 m. The lower atmosphere is transparent to waves of 10 m or more but the upper atmospheric layer called the ionosphere reflects them back to earth.

This property is used for radio communication. Radio communication is done in two ways-by ground wave and sky wave.

The radio waves are divided into:

22. Which of the following is a characteristic of the Subtropical Steppe type of climate?

Correct Answer: B. Low-latitude semi arid or dry
Solution:Tropical and subtropical steppe climate, major climate type of the Köppen classification that occurs primarily on the periphery of the true deserts in low-latitude semiarid steppe regions. Such regions are denoted by the abbreviation BSh in the Köppen-Geiger-Pohl system.

23. Which of the following is the son of Shiva and Mohini and was also called as Shastha?

Correct Answer: C. Ayyappa
Solution:Ayyappan, also known as Dharmashastha, Shastha, Manikandan and Ayyanar is a Hindu deity who is the son of Mohini, an incarnation of Vishnu, and Shiva. He is generally depicted in a yogic posture wearing a bell around his neck, and hence the name Manikantan which literally means 'person with a bell around the neck.

24. With reference to the interior of the earth and earth quakes consider the following statements.

1. The earth's crust is brittle in nature.

2. The direction of vibrations of S-waves is parallel to the wave direction.

3. Surface waves are considered to be the most damaging waves.

Which of the statements given above is/are correct?

Correct Answer: D. 1 and 3 only
Solution:Surface waves, in contrast to body waves can only move along the surface. They arrive after the main P and S waves and are confined to the outer layers of the Earth. They cause the most surface destruction. Earthquake surface waves are divided into two different categories: Love and Rayleigh.

The brittle-ductile transition zone is the strongest part of the Earth's crust. For quartzand feldspar rich rocks in continental crust this occurs at an approximate depth of 13-18 km (roughly equivalent to temperatures in the range 250-400°C).

The Direction of vibrations of S-waves is perpendicular to the wave direction in the vertical plane. Hence, they create troughs and crests in the material through which they pass. Surface waves are considered to be the most damaging waves.

25. The tectonic plate __________ is located between the Philippine and Indian plate (North of New Guinea).

Correct Answer: C. Caroline
Solution:The Caroline Plate is a minor tectonic plate that straddles the Equator in the eastern hemisphere located north of New Guinea. It forms a subduction zone along the border with the Bird's Head Plate and the Woodlark Plate to the south. A transform boundary forms the northern border with the Pacific Plate. Along the border with the Philippine Sea Plate is a convergent boundary that transitions into a rift.

26. Our solar system consists of the sun (the star), 9 planets and __________ moons.

Correct Answer: D. 63
Solution:Consisting of the Sun, a family of 9 planets, 63 moons, millions of asteroids, and billions of stars and comets, our Solar System is home to light, heat, and life. The planets, asteroids, and comets travel around the Sun, the centre of our Solar System. The Solar System has an elliptical or egg shape, and is a part of a galaxy known as the Milky Way.

The inner Solar System consists of the Sun, Mercury, Venus, Earth and Mars. The planets of the outer Solar System are Jupiter, Saturn, Uranus, Neptune and Pluto. Many astronomers believe that the Solar System was formed 4.5 billion years ago with the 'Big Bang', a big explosion which caused the stars, comets, asteroids and planets to take shape.

27. Which of the following is a sedimentary rock?

Correct Answer: A. Shale
Solution:Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles that we commonly call "mud." This composition places shale in a category of sedimentary rocks known as "mudstones." Shale is distinguished from other mudstones because it is fissile and laminated.

Some shales have special properties that make them important resources. Black shales contain organic material that sometimes breaks down to form natural gas or oil. Other shales can be crushed and mixed with water to produce clays that can be made into a variety of useful objects.

28. Bajra is cultivated in Northern Indian States during the ________ cropping season.

Correct Answer: B. Kharif
Solution:Kharif crops or summer crops are domesticated plants that are cultivated and harvested in South Asia during the rainy season, which lasts from April to October depending on the area.

Bajra is a rapid-growing warm weather crop suitable for areas with 40-75 centimetre of annual rainfall. For the vegetative growth of crop moist weather is useful. The crop does best under conditions of light shower followed by bright sunshine. The best temperature for growth of bajra is between 20-28 degree centigrade.

Bajra is grown as a Kharif season crop in northern India; but with irrigation it can be grown as a summer crop in southern India.

29. With reference to India's freedom struggle consider the following statements.

1. Entrepreneurs, such as G.D. Birla opposed the national movement openly.

2. On 26 January 1930, "Independence Day" was observed.

3. The Dandi March ended on 6 April 1930.

Which of the statements given above is/are correct?

Correct Answer: A. 2 and 3 only
Solution:Most Indians recognise 26 January as Republic Day, but not many are aware that on 26 January 1930, exactly 20 years before India became a republic, the Indian National Congress in an electrifying resolution declared Purna Swaraj -complete freedom from the British Raj.

On 5 February, newspapers reported that Gandhi would begin civil disobedience by defying the salt laws. The salt satyagraha would begin on 12 March and end in Dandi with Gandhi breaking the Salt Act on 6 April 1930.

30. ______________ (14-37 CE), the second in the long line of Roman emperors, was the adopted son of Augustus.

Correct Answer: C. Tiberius
Solution:Tiberius was a Roman Emperor from 14 AD to 37 AD. Born Tiberius Claudius Nero, a Claudian, Tiberius was the son of Tiberius Claudius Nero and Livia Drusilla. His mother divorced Nero and married Octavian, later known as Augustus, in 39 BC, making him a step-son of Octavian.