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A pipe of diameter 100 mm is suddenly enlarged to a diameter of 200 mm. If the flow rate of water is 200 litres/s, then the loss of head is:

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HPCL Engineer Mechanical 04 Nov 2022 Official Paper (Shift 2)
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  1. 3.25 m of water
  2. 5.21 m of water
  3. 18.24 m of water 
  4. 4.15 m of water

Answer (Detailed Solution Below)

Option 3 : 18.24 m of water 
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Detailed Solution

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Concept:

Loss of head due to sudden enlargement,

Calculation:

D1 = 100 mm = 0.1 m, D2 = 200 mm = 0.2 m

Q = 200 litres/s  = 0.2 m3/s

∴ h =  18.24 m of water 

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More Types of Minor Losses in Pipe Questions

Q1.Which of the following is NOT a reason for minor head loss in pipe flow?
Q2.Which of the following minor losses in pipe flow is taken as \(\frac{V^2}{2g}\) ? (Consider that 'v' is velocity of the liquid in the pipe and 'g' is acceleration due to gravity.)
Q3.What is the correct relation between the Loss of head at the entrance of a pipe (hi) and Loss of head at the exit of pipe (ho)?
Q4.A pump has to pump water through a pipeline of height of 10 m above the ground at a rate of 0.2 m3/sec. The water in a sump tank is 5 m below the ground level. Neglect head loss due to friction, the pumping power required would be ____________ (Consider g = 10 m/s2).
Q5.The energy loss caused by abrupt enlargement is expressed by:
Q6.Which of the following minor losses in pipe flow is taken as \(0.5\frac{v^2}{2g}\), where V is velocity of liquid in pipe?
Q7.Which of the following minor losses in pipe flow is taken as \(\frac{v^2}{2g}\) ? Where V is the velocity of liquid in a pipe.
Q8.A water tank is located 3 m above ground and depth of water in tank is 2 m. Exit pipe is 50 mm in dia and 50 m long. Velocity of water at the exit at the ground level is approximately (Take friction factor f = 0.05, g = 10 m/s2)
Q9.A pipe carrying 0.05 m3/s of water suddenly contracts from 30 cm to 15 cm in diameter. Then the coefficient of contraction is _________ when the loss of head is 0.5 m. 
Q10.The loss of head due to various pipe fittings such as valves and couplings is expressed as

More Flow Through Pipes Questions

Q1.Which of the following statements about manometric head is correct?
Q2.If a square pipe of side 60 cm, carries a discharge of 3 m/sec, the velocity of flow(m/sec) in the pipe is: 
Q3.The relation of friction loss factor, f = \(\rm \frac{0.3164}{(Re)^{0.25}}\) is correct for which of the following flow?
Q4.Which of the following statements is INCORRECT about the friction factor of Darcy's equation? 
Q5.Total gradient line (or total energy line) is parallel to hydraulic gradient line with a vertical distance of _________. (The symbols have their usual meanings.) 
Q6.A compound pipeline consists of two pieces of identical pipes. The equivalent length of the same diameter and the same friction factor for this compound pipeline is L1 when the pipes are connected in series and is L2 when the pipes are connected in parallel. Determine the ratio of equivalent lengths, that is, L1 to L2.
Q7.Which of the following is NOT the remedial measure to prevent water hammer through pipes?
Q8.Which of the following is NOT a reason for minor head loss in pipe flow?
Q9.A Moody diagram represents ______ as a function of Reynolds number, in a pipe flow. 
Q10.When pipes of different diameters are connected in series from end to end to form a pipe line, the total head loss developed is equal to _______
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Q1.Which of the following best defines vapour pressure in a liquid?
Q2.Priming of a pump refers to:
Q3.How does the volute shape in a single volute pump casing affect performance?
Q4.One challenge associated with double volute casings is:
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Q6.Compared to axial flow pumps, radial flow pumps typically:
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Q8.Fluid pressure is defined as:
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