1. Consider the following statements regarding Earthquakes:
- Earthquake prone zones are ranged from Zone-I to Zone-V in India.
- Richter scale and Mercalli scale measure magnitude and intensity of Earthquakes respectively.
- San Andreas Fault is located on the western side of North American Continent.
Which of the above statements is/are correct.
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1, 2 and 3
Ans: c
Exp: Statement 1 is incorrect. Earthquake prone zones in India are categorized from Zone-II to Zone-V, with Zone-I being the least prone to earthquakes.
Statement 2 is correct. Richter scale measures the magnitude of an earthquake, whereas the Mercalli Scale measures the intensity of an earthquake.
Statement 3 is correct. The San Andreas Fault is a geological fault zone located in California, USA, and is situated on the western side of the North American Continent.
Therefore, the correct option is (c) 2 and 3.
2. Consider the following statements with reference to 'Coal Production in India’:
- India's coal production drastically decreased in the last two decades.
- India is the second largest producer of coal in the world.
- Electricity from new solar farms in India is cheaper than that generated by the country's existing coal plants.
Select the correct answer using the code given below:
a) 1 and 2 only
b) 1 and 3 only
c) 1, 2, 3 only
d) 2 and 3 only
Ans: d
Exp: Statement 1 incorrect: India’s coal production increased by 10.35 % to 67.84 million tonnes (mt) in November from 61.47 mt in November 2019.India’s power plants burn around 1.85-1.87 mt of coal every day to generate electricity.
Statement 2 correct: India is the second largest producer and consumer of coal after China, mining 716 million metric tonnes (789 million short tonnes) in 2018. Coal supplies over 40% of energy in India. Around 30% of coal is imported. Due to high demand and poor average quality, India imports coking coal to meet the requirements of its steel plants. Dhanbad, the largest coal producing city, has been called the coal capital of India. State-owned Coal India had a monopoly on coal mining between its nationalisation in 1973 and 2018.
Most of the coal is burned to generate electricity and most electricity is generated by coal. Statement 3 is correct: Electricity from new solar farms in India is cheaper than that generated by the country's existing coal plants.
India has abundant domestic reserves of coal. Most of these are in the states of Jharkhand, Odisha, West Bengal, Bihar, Chhattisgarh, Telangana and Madhya Pradesh. India has the fourth largest coal reserves in the world. Coal deposits are primarily found in eastern and southcentral India. Jharkhand, Odisha, and Chhattisgarh accounted for almost 70% of the total known coal reserves in India.
3. With reference to the Nechiphu tunnel, consider the following statements:
- The tunnel is located in Assam.
- It is located at an altitude of 5,700 feet.
Which of the statements given above is/are correct?
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans:
Exp: b
Statement 1 is incorrect: The tunnel is located in Arunachal Pradesh.
Statement 2 is correct: It is located at an altitude of 5,700 feet.
4. Consider the following statements regarding Western Disturbances
- Western Disturbances are cyclonic storms that form over land.
- They occur mostly in the Siberian region due to a temperature gradient caused by the mixing of warm air from the tropics and cold air from the northern polar regions.
- Western disturbances are important for the development of the Kharif crop in the northern parts of India.
Which of the above statements is/are correct?
a) 1 only
b) 1 and 2
c) 2 only
d) 2 and 3
Ans: a
Exp:
Western Disturbances are cyclonic storms that form over land, and they occur mostly in the Mediterranean region due to a temperature gradient caused by the mixing of warm air from the tropics and cold air from the northern polar regions. Hence statement 1 is correct, and 2 is incorrect.
It is a non-monsoonal precipitation pattern driven by the westerlies. The moisture in these storms usually originates over the Mediterranean Sea, the Caspian Sea and the Black Sea.
In the case of the Indian subcontinent, moisture is sometimes shed as rain when the storm system encounters the Himalayas. Western disturbances are more frequent and stronger in the winter season.
Western disturbances are important for the development of the Rabi crop, which includes the locally important staple wheat. Hence statement 3 is incorrect.
5. Which of the following is/are correct?
- Koyna river is a tributary of the Krishna River.
- Unlike most of the other rivers in Maharashtra, which flow East-West direction, the Koyna river flows in North-South direction.
- Koyna river is known as the Life Line of Maharashtra.
Which of the above statements is/are correct?
a) 1 and 2
b) 2 and 3
c) 1 and 3
d) 1, 2 and 3
Ans: d
Exp: The Koyna River is a tributary of the Krishna River which originates in Mahableshwar, Satara district, western Maharashtra, India. It rises near Mahabaleshwar, a famous hill station in the Western Ghats. Hence statement 1 is correct.
Unlike most of the other rivers in Maharashtra which flow East-West direction, the Koyna river flows in North-South direction. Hence statement 2 is correct.
The Koyna River is famous for the Koyna Dam and the Koyna Hydroelectric Project. Koyna Hydroelectric Project is the 2nd largest completed hydroelectric project in India. The reservoir – Shivasagar Lake, is a huge lake of 50 km in length.
Due to its electricity generating potential through Koyna Hydroelectric Project, Koyna river is known as the Life Line of Maharashtra. Hence statement 3 is correct.
6. An analog clock is showing 09:20. After how much time will the clock show its mirror image?
a) 5 hour 10 minutes
b) 5 hour 20 minutes
c) 6 hour 10 minutes
d) 6 hour 20 minutes.
Ans: (b) 5 hour 20 minutes
Exp:
For mirror image, we have to take 12:00 or 6:00 as reference time as their mirror images are same as the real image.
09:20 is 2 hours 40 minutes before 12:00.
Therefore, the mirror image of this will be 2 hours 40 minutes after 12:00 i.e. 02:40. Therefore, from 09:20 to 02:40, there is a time gap of 5 hours 20 minutes.
7. If 12 carpenters working 6 hours a day can make 460 chairs in 24 days, how many chairs will 18 carpenters working 8 hours a day make in 36 days?
a) 720
b) 1380
c) 1440
d) 2502
Ans: b
Exp: 12 carpenters working 66 hours a day can make 460 chairs in 24 days i.e. 12×24×6 hours of work can make 460 chairs.
Let 18 carpenters working 8 hours a day can make n chairs in 36 days i.e. 18×36×8 hours of work can bake n chairs.
Since number of working hours is directly proportional to the number of chairs that can be made, 12 × 24 × 6 : 18 × 36 × 8 = 460 : n
12× 24 × 6 × n = 18 × 36 × 8 × 460
n = (18 × 36 × 8 × 460)/(12 × 24 × 6) = 1380.
Cover the entire CSAT syllabus in 70 hours.
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