Q3541. Which of the following technologies is used in smokestacks to reduce particulate matter emissions?
RAS Prelims MCQ Practice
9,654 RAS Prelims practice MCQs with the correct answer and a clear explanation for each. Filter by subject and chapter.
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Q3542. Consider the following statements regarding the ‘Batai’ (crop-sharing) system in medieval Rajasthan:
I. ‘Khet Batai’ involved dividing the field itself between the state and the cultivator before harvesting.
II. ‘Lank Batai’ involved dividing the harvested crop bundles before threshing.
III. ‘Ras Batai’ involved dividing the grain heap after threshing.
IV. The Batai system was extremely unpopular among peasants because it shifted the entire risk of crop failure onto them.
Which of the above combination of statements is/are correct?
I. ‘Khet Batai’ involved dividing the field itself between the state and the cultivator before harvesting.
II. ‘Lank Batai’ involved dividing the harvested crop bundles before threshing.
III. ‘Ras Batai’ involved dividing the grain heap after threshing.
IV. The Batai system was extremely unpopular among peasants because it shifted the entire risk of crop failure onto them.
Which of the above combination of statements is/are correct?
Explanation
The Batai system featured several methods of crop-sharing: Khet Batai involved dividing the field, Lank Batai divided harvested bundles, and Ras Batai divided the grain after threshing. Contrary to the claim of extreme unpopularity, crop-sharing actually protected peasants from complete loss during failures, as the state’s share decreased proportionally with the yield, unlike fixed cash demands.
Q3543. Identify the incorrect statement connecting a South Indian ruler with their northern or contemporary rival.
Explanation
Historical chronologies must match for ruler-rival pairs to be valid. Pulakesi II and Harshavardhana were famous seventh-century rivals, and Narasimhavarman I also fought Pulakesi II during that period. Rajendra I successfully campaigned against Mahipala of the Pala dynasty in the eleventh century. However, Rajaraja I lived in the late tenth and early eleventh centuries, long after Harshavardhana’s death in 647 CE, making any direct military engagement between them an impossibility.
Q3544. The Panama Canal features a complex lock system. Which lake forms the central part of the canal system, requiring ships to be elevated to cross the continental divide?
Explanation
The Panama Canal utilizes a series of locks to raise ships to the level of Gatun Lake, which sits 26 meters above sea level. This large artificial lake forms a central part of the canal’s transit route across the Isthmus of Panama. By using the lake and the Culebra Cut, ships can cross the continental divide before being lowered to sea level.
Q3545. The Delhi-Mumbai Industrial Corridor (DMIC) is a mega infrastructure project being developed with the financial and technical assistance of which country?
Explanation
The Delhi-Mumbai Industrial Corridor is one of the world’s largest infrastructure projects, aimed at developing a high-tech industrial zone along the Western Dedicated Freight Corridor. This project is being implemented with significant financial and technical assistance from the Government of Japan. The collaboration involves developing smart cities and industrial hubs that leverage Japanese expertise in sustainable urban planning and advanced manufacturing technologies.
Q3546. Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R):
Assertion (A): Excessive discharge of nutrients into lakes leads to a decrease in dissolved oxygen.
Reason (R): Nutrient enrichment promotes rapid algal blooms, which consume oxygen upon death and decomposition.
Assertion (A): Excessive discharge of nutrients into lakes leads to a decrease in dissolved oxygen.
Reason (R): Nutrient enrichment promotes rapid algal blooms, which consume oxygen upon death and decomposition.
Explanation
When water bodies receive an excess of nutrients, it triggers a rapid increase in the population of microscopic aquatic plants. While these organisms produce oxygen during the day, their eventual death leads to a massive decomposition process by bacteria. This biological breakdown consumes vast amounts of the oxygen dissolved in the water, creating a hostile environment for fish and other aquatic life.
Q3547. Which of the following pairs related to revenue assessment terms is incorrectly matched?
Explanation
Revenue assessment involved various terms like Kunta for standing crop estimation, Dori for land measurement, and Zabti for cash-based demands. Ghugri, however, was not an insurance system; it typically referred to a specific quantity of grain collected for local needs or charity. Understanding these terms is essential for grasping the complexities of the medieval agrarian and tax administration.
Q3548. Match List I with List II and select the correct answer using the codes given below.
| Chola Village Assembly | Nature of Assembly |
|---|---|
| A. Ur | i. Assembly of merchants and traders |
| B. Sabha | ii. General assembly of common tax-paying villagers |
| C. Nagaram | iii. Assembly of the entire Nadu district |
| D. Nattar | iv. Exclusive assembly of Brahmins in a Brahmadeya village |
Explanation
Chola society featured diverse local assemblies. The Ur was a general assembly of common villagers. The Sabha was an exclusive body of learned Brahmins found in tax-free Brahmadeya villages. The Nagaram served the specific interests of merchants and traders in commercial centers. Above these, the Nattar represented the interests of the entire Nadu or district. These bodies played a crucial role in local administration, land management, and tax collection within the empire.
Q3549. Consider the following statements regarding the Kiel Canal:
I. It is situated in Germany.
II. It connects the North Sea with the Baltic Sea.
III. It facilitates a shorter route by avoiding the hazardous voyage around the Jutland Peninsula.
Which of the above statements is/are correct?
I. It is situated in Germany.
II. It connects the North Sea with the Baltic Sea.
III. It facilitates a shorter route by avoiding the hazardous voyage around the Jutland Peninsula.
Which of the above statements is/are correct?
Explanation
The Kiel Canal is a vital artificial waterway located in northern Germany. It connects the North Sea at Brunsbüttel to the Baltic Sea at Kiel. By providing a direct path, it allows ships to avoid the much longer and often hazardous voyage around the Jutland Peninsula of Denmark. This results in significant savings in time and fuel for maritime traffic.
Q3550. Eutrophication of water bodies is predominantly caused by an excess of:
Explanation
The process of nutrient enrichment in lakes and slow-moving rivers is primarily driven by two specific elements. These substances are commonly found in fertilizers used in agriculture and in domestic sewage. When they wash into water bodies, they act as powerful fertilizers for algae. The resulting overgrowth disrupts the natural balance of the ecosystem, leading to decreased water clarity and oxygen depletion.Answer key for these questions
| Q | Correct answer |
|---|---|
| 3541 | (a) Electrostatic precipitators |
| 3542 | (a) I, II, and III only |
| 3543 | (c) Rajaraja I - Harshavardhana |
| 3544 | (c) Gatun Lake |
| 3545 | (c) Japan |
| 3546 | (a) Both A and R are true and R is the correct explanation of A. |
| 3547 | (d) Ghugri - A state-provided system of crop insurance. |
| 3548 | (a) A-ii, B-iv, C-i, D-iii |
| 3549 | (d) I, II and III |
| 3550 | (d) Nitrogen and Phosphorus |
Frequently asked questions
How many RAS Prelims practice MCQs are there on RAS Prelims?
This page has 9654 practice MCQs on the RAS Prelims syllabus. Each has the correct answer, and most have an explanation.
How should I practise MCQs for RAS Prelims?
Attempt each question first, then open the answer and read the explanation. Practise one chapter at a time, note the facts you got wrong and revise them. Repeat the chapter after a few days.
Are these actual RAS Prelims past-paper questions?
No. These are practice questions written for the RAS Prelims syllabus. They follow the pattern the exam uses: factual questions, statement-based questions, match-the-list and assertion-reason.