Q6. “With reference to a four-ram hydraulic gear”, having duplicate pumps-
a) Sketch the arrangements of relief, make up, isolating and by-pass valves. (8)
b) Explain the use of isolating and by-pass valves, if one of the cylinders has fractured. (4)
c) Describe the arrangement provided to indicate the loss of hydraulic fluid due to leakage. (4)
Q5. Sketch and describe the operation of a four ram electro-hydraulic steering gear system. Indicate and explain the valve positions for the operation of the system when one pump is isolated, and the unit is operating on two rams only.
Q4. With reference to electro hydraulic steering gear systems with four rams.
(a) With the aid of a sketch describe the working principle of hydraulic pump. (8)
(b) Explain the method adopted to prevent hydraulic oil leakage along the rams. (4)
(c) Discuss the methods adopted to prevent damage to the steering gear due to jumping of rudder in heavy seas. (4)
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