Question

Match List I with List II

List I (Water lifting devices) & List II (Water lifting devices Situations)
A. Persian wheel & I. Unlined wells
B. Denkli & II. Lined wells
C. Churus & III. Depth of well is 12 to 20 m
D. Centrifugal pump & IV. Positive displacement pump
E. Hand Pump & V. Discharge varies directly as speed

Choose the correct answer from the options given below:

• A. A - III, B - I, C - II, D - V, E - IV
• B. A - II, B - I, C - III, D - IV, E - V
• C. A - III, B - I, C - II, D - IV, E - V
• D. A - IV, B - I, C - II, D - V, E - III

Hint:

For pump matching questions, remember the affinity law for centrifugal pumps: Discharge is directly proportional to speed (\(Q \propto N\)).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Water-lifting devices include traditional human- and animal-powered systems as well as modern mechanical pumps.
Each device is suited for specific operating conditions, depths, and structures.
Detailed Explanation:
Let us evaluate each pairing:
- A. Persian wheel (Rahat): A traditional animal-powered, continuous chain-of-buckets system. It is suited for lifting water from medium-depth wells, typically where the III. Depth of well is 12 to 20 m.
- B. Denkli: A simple counterpoise lever system used by a single operator. It is suited for lifting water from shallow, I. Unlined wells or surface water bodies.
- C. Churus (Mote): A traditional leather bucket pulled by draft animals. It is typically operated in deep, II. Lined wells to prevent the bucket from damaging the well sides.
- D. Centrifugal pump: A mechanical turbopump where the flow rate (discharge, \(Q\)) is proportional to the rotational speed (\(N\)), meaning the V. Discharge varies directly as speed according to affinity laws (\(Q \propto N\)).
- E. Hand Pump: Typically operates using a reciprocating piston mechanism, which is classified as a IV. Positive displacement pump.
Mapping these pairs gives: A - III, B - I, C - II, D - V, E - IV.

Step 2: Final Answer:
This sequence matches Option (A).