SSC-Junior Engineer (Civil & Structural) Online Exam 2018

PAPER-I
GENERAL INTELLIGENCE AND REASONING

Total Questions: 50

1. Galena is an ore of:

Correct Answer: D. lead
Solution:Galena, also called lead glance, is the natural mineral form of lead (II) sulfide. It is the most important ore of lead and an important source of silver. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms.

2. Which river is known as 'Tsang Po' in Tibet and 'Jamuna' in Bangladesh?

Correct Answer: B. Brahmaputra
Solution:The Brahmaputra is one of the major rivers of Asia, a trans-boundary river which flows through China, India and Bangladesh. It is known as the Yarlung, Tsangpo River in Tibet, the Brahmaputra, Lohit, Siang, and Dihang in India, and the Jamuna in Bangladesh.

3. The acid secreted by the gastric glands of human beings which helps in the digestion of food is _________.

Correct Answer: B. Hydrochloric acid
Solution:Stomach secretions are made up of hydrochloric acid, several enzymes, and a mucus coating that protects the lining of the stomach. Hydrochloric acid helps the body to break down, digest, and absorb nutrients such as protein. It also eliminates bacteria and viruses in the stomach, protecting the body from infection.

4. Which of the following mammals was declared extinct in India in 1952?

Correct Answer: B. Cheetah
Solution:India was once home to many cheetahs, but the last of them was killed in 1947. It was declared extinct in 1952. It is the only large animal to have been declared extinct in India in recorded history.

The cheetah, the smallest of the big cats, can run faster than any other animal on land, at more than 100 km per hour.

5. As per the Economic Survey 2018, India ranks _______ in terms of the installed capacity of wind power.

Correct Answer: B. 4th
Solution:India has attained the fourth position globally in installed wind power capacity after China, US and German. India's renewable energy sector is undergoing transformation with a target of 175 GW of renewable energy capacity to be reached by 2022.

6. During the early years of his reign, Akbar's rule was actually run by his regent named:

Correct Answer: A. Bairam Khan
Solution:Akbar succeeded his father, Humayun, under a regent, Bairam Khan, who helped the young emperor expand and consolidate Mughal domains in India. Following the chaos over the succession of Sher Shah Suri's son Islam Shah, Humayun reconquered Delhi in 1555, leading an army partly provided by his Persian ally Tahmasp I.

A few months later, Humayun died. Akbar's guardian, Bairam Khan concealed the death in order to prepare for Akbar's succession. Akbar succeeded Humayun on 14 February 1556, while in the midst of a war against Sikandar Shah to reclaim the Mughal throne. In Kalanaur, Punjab, the 14-year-old Akbar was enthroned by Bairam Khan on a newly constructed platform, which still stands. He was proclaimed Shahanshah. Bairam Khan ruled on his behalf until he came of age.

7. Which of the following rulers erected his decrees at public places?

Correct Answer: C. Ashoka
Solution:Ashoka expanded the borders and influenced the empire to its height. His architectural influence spread across India. When Ashoka passed an imperial decree, he often had it carved into sandstone pillars that were erected across the empire. These pillars are the oldest examples of monumental sculpture in India, with more than 40 found across the subcontinent.

8. The approximate average density of earth is ______ gm/cm³.

Correct Answer: B. 5.51
Solution:The value for the mean density of the earth, which had been proposed internationally in 1924 but had not been adopted, is 5.526 g/cm³. The value that has been used for about 30 years and still is considered best by many is 5.52 g/cm³. According to Lambert, the mean density of earth is 5.51 to 5.52.

9. Which of the following substance is NOT used as coolant in nuclear reactors?

Correct Answer: A. Graphite
Solution:In Nuclear reactor, graphite is used for moderation of neutrons. Keep that simple, neutrons are needed to bring to a certain energy level (0.025eV) which is known as thermalization or moderation.

Graphite is preferred over all other materials because of:

1. Graphite has low neutron absorption cross section, simply, it can absorb neutrons to a minimum extent.

2. Graphite has high scattering cross section that is it scatters neutrons. In other words, it deviates a neutron by colliding with neutrons within it's path.

3. Graphite has high logarithmic energy decrement. Simply, it losses much more energy in every collision. That's why when it collides, it losses energy rapidly.

From these parameters, we calculate a factor, Moderating Ratio which is the measure of effectiveness of a material as a neutron moderator. Albeit, heavy water (D2O) has the highest Moderating Ratio, but, graphite has its own distinctive advantages such as it's solid, it occupies less volume and above all, it's cheap.

10. In the context of transport facility, India's first indigenous fare collection system has been named as:

Correct Answer: A. SWEEKAR
Solution:India's first indigenously developed payment eco-system for transport consisting of NCMC Card, SWEEKAR and SWAGAT is based on NCMC Standards. These are bank issued cards on debit/credit/prepaid card product platform.