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Consider the following statements about a hydraulic ram :
1. Hydraulic ram does not need external power.
2. It works on the fundamental principle of water hammer.
3. The efficiency of a hydraulic ram is only of the order of 8 to 10%.
4. It can be termed as a low, intermittent discharge low-head pumping installation. Which of these statements are correct ?



Options:
A .  2 and 3
B .  1, 2, 3 and 4
C .  1 and 2
D .  1 and 3
Answer: Option C



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