Special Pumps & Hydraulic Devices

Explain the working principle of air lift pump with neat sketch.

Write short notes on Hydraulic accumulator and hydraulic Intensifier.

Find the number of pumps required to take water from a deep well under a total head of $156 \text{ m}$. Also the pumps are identical and are running $1000 \text{ rpm}$. The specific speed of each pump is given as $20$ while the rated capacity of each pump is $150 \text{ liters/s}$.

Discuss the basic working principle of hydraulic press with neat sketches. A hydraulic press has a ram of $500\text{ mm}$ and a plunger of $50\text{ mm}$ diameter. What force is required on the handle to lift a load of $20\text{ kN}$, if the leverage is $1:10$?

It is required to deliver $0.048\text{ m}^3\text{/s}$ of water to a height of $24\text{ m}$ through a $150\text{ mm}$ diameter pipe and $120\text{ m}$ long, by a centrifugal pump. If the overall efficiency of the pump is $75$ and coefficient of friction, $f = 0.01$ for the pipe line, find the power required to drive the pump.

How surge tank or shaft works in a typical hydroelectric scheme, discuss with net sketch.

Write short notes on (any three):
Hydraulic press
Hydraulic crane
Effect of friction in the suction and delivery pipes on the indicator diagram of reciprocating pump
Draft tube.