Which of the following method(s) is/are adopted in the design of air duct system 1. Velocity reduction method 2. Equal friction method 3. Static regain method. Select the correct answer using the codes given below: Codes:

Which of the following method(s) is/are adopted in the design of air d

1.	Which of the following method(s) is/are adopted in the design of air duct system 1. Velocity reduction method 2. Equal friction method 3. Static regain method. Select the correct answer using the codes given below: Codes:
A.	1 alone
B.	1 and 2
C.	2 and 3
D.	1, 2 and 3
Answer» E.

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Which of the following method(s) is/are adopted in the design of air duct system 1. Velocity reduction method 2. Equal friction method 3. Static regain method. Select the correct answer using the codes given below: Codes:

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