What Are the Steering Gear Motor Safeties

What are the steering gear motor safeties? a.Overload alarm. b.200% insulation in motor. c.High temperature alarm. d.Self-starting after power failure. e.Short circuit trip. f.Phase failure alarm.  g.One of the steering motor is fed from the emergency bus. Hydraulic side there is two trips a.Low level cutout b.High lube oil temperature cutout. Explain the various rudder inspections and testing in the dry dock a.Visual examination of the rudder plating for cracks and distortion b.Air plugs and drain plugs are to be opened in the  presence of the class class surveyor, repair superintendent superintendent and chief officer. Water draining out indicates a breached rudder and the breach to be located by air  pressure testing and applying soap solution, repairs repairs to be planned c.Check the rudder drop in the steering gear compartment (trammel gauge) d.Check the pintle clearances, jumping bar clearance and the palm coupling bolts tightness to be checked e.Check the rudder stock for corrosion, erosion and any damage f.The inspection plates in the way of the upper, the lower pintle to be cut open, and the pintle nuts checked for proper securing. Later the plates to be welded and tested.  g.Hydraulic test the rudder for a static head of about 2.45m of sea water h.After draining and re oiling the internals, plug the drain and check the effectiveness by a vacuum check and cement the plug i.The rudder stock gland packing has to be checked and renewed

Explain the purpose of the hunting gear a.To put the pump on stroke gradually b.To stop the pump at the end of the stroke gradually c.To lock the rudder at desired position till further movement is given at helm d.To transmit movement of telemotor to pump e.Spring in the hunting gear store extra control movement to ensure that the pump operates at the maximum capacity for major part of the turning operation What are the properties of steering gear lube oil? a.Satisfactory flow properties b.High viscosity index c.Low compressibility d.Good lubricating properties e.Low vapor pressure f.Compatibility with system materials  g.Chemical stability h.Protection against corrosion i.Rapid air-release and water separation  j.Good thermal conductivity k.Fire resistance (desirable)