Question

Consider the following statements regarding the design of channels by the theory of Lacey’s or Kennedy’s. (A) Theoretical concept of silt transportation remains same in both the theories.
(B) Lacey improves upon Kennedy theory.
(C) There are no defects in either the theories of Lacey or of Kennedy.
(D) Lacey and Kennedy theory related to designing a lined canal/channels. % Choose the correct answer Choose the correct answer from the options given below:

• A. (A) and (B) only
• B. (A) and (D) only
• C. (B) and (C) only
• D. (B), (C) and (D) only

Hint:

When studying theories related to channel design, understand the historical improvements one theory has made over the other.

Answer 1

The Correct Option is D

Step 1: Understanding the theories.
The theory of Lacey and Kennedy both aim to design optimal channels, but Lacey’s theory made improvements on Kennedy’s. The concepts related to silt transportation are similar in both theories, and both theories do not have any major defects in their approaches. Additionally, the theories are both used in the design of lined canals.
Step 2: Conclusion.
The correct answer is (B), (C), and (D), as all three statements are accurate regarding Lacey’s and Kennedy’s theories.
Final Answer: \[ \boxed{4. (B), (C) and (D) only} \]