1. A long pipe is considered whose length is more than ……………………………. times of its diameter.
(A) 10
(B) 100
(C) 2000
(D) 1000
2. Hydraulic mean depth of a circular pipe is equal to
(A) d/4
(B) d/2
(C) d/6
(D) d/8
3. Loss of head due to sudden enlargement.
(A) 0.375 V₂² / 2g
(B) 0.5 V₂² / 2g
(C) (V₁ − V₂)² / 2g
(D) V₂² / 2g
4. Loss of head due to sudden contraction.
(A) (V₁ − V₂)² / 2g
(B) 0.5 V₂² / 2g
(C) V₂² / 2g
(D) 0.375 V₂² / 2g
5. Loss of head at entrance in the pipe.
(A) (V₁ − V₂)² / 2g
(B) 0.375 V₂² / 2g
(C) 0.5 V₂² / 2g
(D) V₂² / 2g
6. Loss of head at exit of pipe is given by
(A) (V₁ − V₂)² / 2g
(B) 0.5 V₂² / 2g
(C) V₂² / 2g
(D) 0.375 V₂² / 2g
7. Major loss of head is due to
(A) Bend
(B) Friction
(C) Obstruction
(D) All of these
8. According to Darcy's formula major loss.
(A) 4fLv² / 4gD
(B) 4fLv² / 2gD
(C) 3fLv² / 4gD
(D) 5fLv² / 3gD
9. Hydraulic gradient "i" is calculated by
(A) f / lh
(B) hf × l
(C) l / hf
(D) hf / l
10. The line joining pressure heads of a liquid flowing in the pipe is termed as
(A) Total energy line
(B) Hydraulic gradient line
(C) Pressure line
(D) Pressure head line