EXAMEN BREVET OFITER MECANIC-MIAMH 2

1.What is shown here ?

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2.What ensures the tightness of the filter cover (1) to the filter body (3) ?

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1. A Lubricating Oil pressure line filter. nmlkj2. A Fuel Oil pressure line filter. nmlkj3. A seawater, basket suction strainer. nmlkj4. A centrifugal filter. nmlkj

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1. The vacuum created in the filter. nmlkj2. The clamp on top of the filter cover. nmlkj

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3/14/2011file://C:\WINDOWS\TEMP\cba4_4.html

3.What type of filter is shown here ?

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4.What is the correct parts description list of this pressurised filter ?

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3. The filter's gasket. nmlkj4. The gasket pressed down by the filter cover's clamp. nmlkj

1. A cartridge type pressure line filter. nmlkj2. A suction wire mesh filter. nmlkj3. A rotating filter. nmlkj4. A magnetic filter. nmlkj

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5.Oil purifiers can be used for purifying as well as for clarifying operations. The purifying operation is referred to as..........

6.What do you call the tanks in which heavy fuel oil is stored on board ?

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1. 1 = Top plate, 2 = Mesh cloth, 3 = Housing. nmlkj2. 1 = Filter cover, 2 = Ribbed filter cartridge, 3 = Filter body. nmlkj3. 1 = Top cover, 2 = Element, 3 = Cast body. nmlkj4. 1 = Filter top, 2 = Filter cloth, 3 = Housing body. nmlkj

1. the separation of light liquids from heavy liquids, (oil from water) and is called a two-phase operation.

nmlkj

2. the separation of solids from liquids and is called a single phase operation. nmlkj3. the separation of solids from oils with the use of a water barrier seal and is called a two-phase

operation. nmlkj

4. a 3-phase separating operation of light liquid, heavy liquid and solids (water, oil, dirt). nmlkj

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7.What do you call the gate valves "MP", "MS", "AP", "AS" located on deck ?

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1. Heavy fuel oil tanks. nmlkj2. Heavy fuel oil daily tanks. nmlkj3. Heavy fuel oil settling tanks. nmlkj4. Heavy fuel oil bunker tanks. nmlkj

1. Heavy fuel oil shut-off valves. nmlkj2. Heavy fuel oil manifold bunker valves. nmlkj3. Heavy fuel oil main bunker valves. nmlkj4. Heavy fuel oil tank valves. nmlkj

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8.How is heavy fuel oil from the deeptank transferred to the bunker ?

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9.What is the name and function of the gate valve "BV" ?

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1. Via suction valve "S", the transfer pump, to discharge valve "D". nmlkj2. Via main bunker valve "B.V." to transfer pump "Tp". nmlkj3. Via own pumps "P1" and "P2", the main bunker valve "BV" to valve "D". nmlkj4. Via own pumps "P1" and "P2" to transfer pump "Tp". nmlkj







1. Main bunker valve, separates bunker manifold from Engine Room. nmlkj

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10.How is the free flow of HFO in the bunker tanks maintained when the external temperature drops below it's pour point ?

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11.Which valve in the engine room must be kept closed if no bunker operations or transfer from the deep tanks are taking place ?

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2. Bunker valve, separates suction and discharge manifold. nmlkj3. Bunker valve, separates bunker manifold from deeptank. nmlkj4. Main bunker valve, separates double bottom tanks. nmlkj







1. By transferring it on time to the HFO settling tank. nmlkj2. By circulating it with the transfer pump. nmlkj3. By heating the oil with steam via steam coils or steam banks. nmlkj4. By always ensuring that warm oil is bunkered. nmlkj

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12.What is the purpose of the drain cock (3) on this filter ?

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1. The settling tank valve. nmlkj2. Valve "BV". nmlkj3. Valve "S". nmlkj4. Valve "D". nmlkj







1. To drain the dirt out of the filter basket. nmlkj2. To take samples of the liquid. nmlkj3. To drain out the collected water. nmlkj4. To drain the filter before cleaning. nmlkj

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13.What type of pump would normally be fitted at position "P" ?

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14.What type of pump is the pump "P" ?

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1. A piston pump. nmlkj2. A centrifugal pump. nmlkj3. A vane pump. nmlkj4. A gear or screw displacement pump. nmlkj







1. A centrifugal pump. nmlkj

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15.Where are you most likely to find this kind of valve fitted ?

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16.What kind of valve is this ?

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2. A piston pump. nmlkj3. A gear or worm wheel pump. nmlkj4. A vane pump. nmlkj

1. On ballast lines. nmlkj2. In diesel engine starting air lines. nmlkj3. On refrigerating machinery. nmlkj4. On sea chests. nmlkj

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17.Where is this type of valve usually found ?

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1. A manually operated butterfly valve. nmlkj2. A gear operated butterfly valve. nmlkj3. A gear operated gate valve. nmlkj4. A worm wheel operated gate valve. nmlkj

1. In piping with large flow but low pressure. nmlkj2. In piping of high pressure and large flow. nmlkj3. In piping of low pressure and low flow. nmlkj4. In piping of high pressure but limited flow. nmlkj

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18.What are parts 1 and 4 and what ensures the seal between them ?

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19.What is this unit called ?

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1. Part 1 = top plate, part 4 = casing, an O-ring. nmlkj2. Part 1 = valve cover, part 4 = valve body, a gasket. nmlkj3. Part 1 = valve plate, part 4 = cast body, a seal. nmlkj4. Part 1 = top cover, part 4 = valve casing, a joint. nmlkj







1. A shaft seal gland and packing. nmlkj

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20.If you find a leak on one of the tubes of this heat exchanger, what should you do ?

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21.On a reciprocating pump piston, the rings are made of material with low elastic limit such as hard rubber, Bakelite etc. In order to be able to fit them in the piston grooves you will need to ..............

22.How is the sealing ring (2) fitted on the butterfly valve plate ?

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2. A mechanical shaft seal. nmlkj3. A segmented seal unit. nmlkj4. A flexible type rotating packing assembly. nmlkj

1. Weld the tube tight. nmlkj2. Put the heater out of commission. nmlkj3. Seal off the tube with plugs hammered in both tube ends. nmlkj4. Machine plugs and weld in place. nmlkj

1. use a special sliding tool. nmlkj2. apply grease or vaseline to slide the rings on. nmlkj3. heat them in boiling water for 20 to 30 minutes. nmlkj4. put them on top of the boiler casing to warm up. nmlkj

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23.What is part number 1 ?

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1. It is kept in place by a retaining ring secured by countersunks. nmlkj2. It is bolted on and secured by wiring. nmlkj3. It is glued on a separate removable ring. nmlkj4. It sits in a grooved bolted-on section. nmlkj







1. The fresh water pump. nmlkj2. The fresh water generator. nmlkj3. The salt water generator. nmlkj4. The thermostat pump. nmlkj

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24.What kind of valve is this ?

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25.What type of valve is shown here ?

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1. A screw-down non-return valve. nmlkj2. A fixed non-return valve or check valve. nmlkj3. A high pressure control valve. nmlkj4. A high pressure stop valve. nmlkj

1. A 90 degree gate valve. nmlkj

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26.What would loss of vacuum indicate on a bilge pump?

27.What is the usual method of reducing delivery pressure on a gear pump?

28.How is air leakage into the packing gland of a condensate pump is prevented?

29.From the following pump capacities, which would be most suitable for the domestic fresh water system?

30.Where what be the most likely service for a multi stage centrifugal pump?

2. An angle screw lift valve. nmlkj3. An angle screw-down valve (non return). nmlkj4. A 90 degree check stop valve. nmlkj

1. Suction strainer blocked. nmlkj2. Bilge empty. nmlkj3. Pump impeller choked. nmlkj4. Discharge valve closed. nmlkj

1. By adjusting the internal spring loaded pressure relief valve. nmlkj2. By throttling the suction valve. nmlkj3. By throttling the discharge valve. nmlkj4. By fitting an orifice in the discharge line. nmlkj

1. A water seal line to the packing gland. nmlkj2. Special packing in the stuffing box. nmlkj3. An air seal line from the compressed airline. nmlkj4. The air pump fitted to the pump. nmlkj

1. 5 m3/hour x 50 metres. nmlkj2. 0.5 m3/hour x 40 metres. nmlkj3. 20 m3/hour x 25 metres. nmlkj4. 40 m3/hour x 55 metres. nmlkj

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31.What capacity would you consider most suitable for a ballast pump?

32.For which service would a gear pump be most suitable?

33.Reciprocating pumps are most suited to pumping which medium?

34.Worm and worm wheel distinguish between what pump components?

35.What service are centrifugal pumps most suitable for?

1. Bilge and ballast. nmlkj2. Fuel oil transfer. nmlkj3. Boiler feed pump. nmlkj4. Hydraulic winch power pack. nmlkj

1. 25 to 50 cubic metres/hour. nmlkj2. 10 to 15 cubic metres/hour. nmlkj3. 20 to 30 cubic metres/hour. nmlkj4. 100 to 150 cubic metres/hour. nmlkj

1. Bilge pumping. nmlkj2. Engine lub oil pressure supply. nmlkj3. Engine cooling water circulating. nmlkj4. Boiler feed water supply. nmlkj

1. Liquids mixed with solids. nmlkj2. Transferring liquids at very high flow rates. nmlkj3. Liquids having high air content. nmlkj4. Pumping liquids against a high head pressure. nmlkj

1. The rounded and the bellow gear. nmlkj2. The driving and driven shaft gears. nmlkj3. The tangential gear and the straight shaft gear. nmlkj4. The long shaft gear and the stub shaft gear. nmlkj

1. Where liquids are not excessively viscous. nmlkj

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36.When assembling an "Endless Screw" type pump what results from insufficient axial or radial clearance?

37.When starting a centrifugal pump what condition would be adopted to reduce the initial load?

38.What would be the main reason for a centrifugal pump's performance deteriorating over time?

39.What would you do on first starting a gear pump if pumping cold oil?

40.What is the most obvious reason for drop in electrical load on a ballast pump?

2. Where liquids are extremely viscous. nmlkj3. Where there is a high air content. nmlkj4. Where the liquid has a high temperature. nmlkj

1. Pump will draw more load and quickly overheat. nmlkj2. The pump will not pump. nmlkj3. The pump will not deliver correct pressure. nmlkj4. The shaft seal will loosen due to vibrations. nmlkj

1. The suction valve closed. nmlkj2. The discharge valve closed. nmlkj3. The suction valve throttled. nmlkj4. Suction and discharge valves closed. nmlkj

1. Cavitation of the impeller. nmlkj2. Excessive wear between impeller and wear ring. nmlkj3. Wear of the gland neck bush. nmlkj4. Wear of the pump housing. nmlkj

1. Start/stop the pump frequently. nmlkj2. Start the pump with valves closed and gradually open. nmlkj3. Ease off the spring loaded pressure relief valve. nmlkj4. Throttle the suction valve. nmlkj

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41.What is the most commonly used packing for valve spindle glands?

42.Why does the fluid pass through the valve from beneath the valve lid?

43.Where would you find a duplex filter unit?

44.Where would you find a thermostatic control valve?

45.How does a 'quick closing' valve operate?

1. Malfunction of the electrical motor. nmlkj2. Pump no longer pumping liquid. nmlkj3. Malfunction of the pump. nmlkj4. Tank being transferred into is full. nmlkj

1. Mechanical shaft seal. nmlkj2. Soft gland packing. nmlkj3. Preformed lip seals nmlkj4. Carbon sealing rings. nmlkj

1. The valve is easier to open. nmlkj2. With the valve closed the delivery pressure is isolated from the gland. nmlkj3. There is less restriction to flow in this direction. nmlkj4. There is less scouring of the valve seat at partial openings. nmlkj

1. In fuel oil piping. nmlkj2. In sea water piping. nmlkj3. In starting air piping. nmlkj4. In bilge piping. nmlkj

1. In an engine lub oil system. nmlkj2. In a fuel oil system. nmlkj3. In an engine jacket water cooling system. nmlkj4. In hydraulic ring main supply system. nmlkj

1. An independent mechanism closes the valve. nmlkj

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46.Where would you always find Screw Down Non-Return valves fitted?

47.What is the first check if difficulty is encountered when pumping bilges if the suction gauge reading is high?

48.Why are conventional strainers not fitted in the cargo hold bilge wells?

49.How are cargo hold bilge wells covered to prevent solids from entering them?

50.What type of valve is fitted to cargo bilge lines at the Engine Room bulkhead?

2. The valve bridge is collapsed remotely allowing the valve to close. nmlkj3. A retaining collar is released allowing the valve to close. nmlkj4. The valve can only be opened and closed hydraulically. nmlkj

1. As ballast tank valves. nmlkj2. As fire main isolating valves. nmlkj3. As bilge suction valves. nmlkj4. As fuel tank valves. nmlkj

1. Clean the oil/water separator. nmlkj2. Inspect pump internals for wear. nmlkj3. Open the sea suction valve to prime pump. nmlkj4. Check suction strainers and valves. nmlkj

1. They would restrict the pumping of bilge wells. nmlkj2. Because they are inaccessible when cargo is loaded. nmlkj3. Because the cargo holds are cleaner than the engine room. nmlkj4. Because they might be damaged during loading and discharging. nmlkj

1. By steel grid plates bolted in place. nmlkj2. By very fine mesh grids. nmlkj3. By perforated plating. nmlkj4. There is no covering. nmlkj

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51.What is the purpose of a cofferdam?

52.If the valve wheel of an extended spindle valve is free, but the valve does not seem to be not moving, what would you check first?

53.According to regulations, on board ships it is necessary to have PUMP REDUNDANCY. What does this mean?

54.What generator cooling is sometimes used during dry-docking?

55.In a centrifugal general service pump how are suction and discharge sections separated?

1. Gate valves. nmlkj2. Non-return screw down valves. nmlkj3. Butterfly valves. nmlkj4. Screw lift valves. nmlkj

1. To provide a barrier space between tanks containing different liquids. nmlkj2. As an emergency storage space for bilge water. nmlkj3. As a collection space for leaking pipe work. nmlkj4. As a watertight barrier. nmlkj

1. Whether the valve is dirty. nmlkj2. To see if the valve spindle is being turned. nmlkj3. To see if there is excess pressure on the valve. nmlkj4. To check that the valve is not broken. nmlkj

1. All pumps in the engine room are duplicated. nmlkj2. All essential pumps in the engine room have a back-up possibility. nmlkj3. Two identical pumps must be fitted for each circuit. nmlkj4. A stand-by pump must be available for each pump separately. nmlkj

1. Ship's sanitary system. nmlkj2. Circulating fresh water tanks. nmlkj3. Ballast pumps. nmlkj4. Circulating fore or aft peak tanks. nmlkj

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56.If a serious cavitation problem is experienced effecting the pump casing and impeller badly, the shape and design of which pump part could be altered and why?

57.Why is an isolating valve fitted on the fire main from the engine room?

58.What could cause overheating after pump overhaul if it is verified that assembly is correct?

59.What maximum oil content must oil/water separators generally discharge?

60.What maximum oil content may be discharged overboard in 'Special Areas'?

1. Mechanical garter spring seals. nmlkj2. Machineable sealing rings. nmlkj3. Neoprene lip seals. nmlkj4. Labyrinth seals. nmlkj

1. The shape of the inlet piping to smooth the flow into the impeller. nmlkj2. The shape of the outlet pipe to dampen turbulence. nmlkj3. The shape of the impeller to decrease capacity. nmlkj4. The shape of the mouth ring to extend it and avoid turbulence. nmlkj

1. To isolate the pump for repairs. nmlkj2. To isolate the engine room and enable the emergency fire pump to supply the deck. nmlkj3. In case there is a fire restricted to the engine room. nmlkj4. To maintain pressure on the fire main with the pump not running. nmlkj

1. The pump is not bled off properly. nmlkj2. Insufficient liquid supply to the pump. nmlkj3. Tightness of the shaft. nmlkj4. Obstruction on the discharge side. nmlkj

1. 1000ppm. nmlkj2. 500ppm. nmlkj3. 100ppm. nmlkj4. 50ppm. nmlkj

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61.Under what circumstance may untreated bilges be discharged overboard in 'Special Areas'?

62.What happens if the separator oil content exceeds the equipment allowable level?

63.What pollution certification must deep-sea vessels possess?

64.What is the purpose of the Oil Record Book?


1. No oil content is permissable. nmlkj2. 15ppm. nmlkj3. 25ppm. nmlkj4. 50ppm. nmlkj

1. When proceeding Full Ahead. nmlkj2. During the hours of darkness. nmlkj3. Only in a case of emergency. nmlkj4. If the bilges are only to be lowered and not pumped right out. nmlkj

1. The pump is stopped and an alarm sounds. nmlkj2. A visible alarm. nmlkj3. An audible alarm. nmlkj4. The discharge is dumped to the bilge. nmlkj

1. Lloyd's Machinery survey certificate. nmlkj2. MCA pollution certificate. nmlkj3. IOPP certificate. nmlkj4. Safety Construction certificate. nmlkj

1. To record quantity of fuel onboard. nmlkj2. To record all fuel bunkered and bilge discharges. nmlkj3. To record fuel consumption. nmlkj4. To record oily bilge levels. nmlkj

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1. A cover securing screw. nmlkj2. A pressure adjuster. nmlkj3. A vent screw. nmlkj4. A drain screw. nmlkj

1. The pump shaft. nmlkj2. The motor shaft. nmlkj3. The pressure outlet. nmlkj4. An air seal. nmlkj

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68.What part number is the pump shaft ?

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1. A pressure adjusting scew. nmlkj2. A drain plug. nmlkj3. An inspection plug. nmlkj4. A sacrificial anode. nmlkj

1. Number 2. nmlkj

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69.What are items "S" and what is their purpose ?

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70.If you find it difficult to obtain suction whilst pumping bilge well "A" which of the following actions would you take ?

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2. Number 1. nmlkj3. Number 5. nmlkj4. Number 4. nmlkj







1. Suction valves to pump the wells. nmlkj2. Strainers to stop dirt from entering the bilge system. nmlkj3. Suction boxes to retain priming water. nmlkj4. Elephant shoe to facilitate bilge pumping. nmlkj

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71.In which pipe lines would you expect to find an illuminated sight glass?

72.What is the component shown here ?

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1. Check that bilge well valves "B","C" and "D" are properly closed. nmlkj2. Check that strainer cover of well "A" is not leaking. nmlkj3. Prime the pump with sea water. nmlkj4. All of these. nmlkj

1. Lube oil pump discharge lines. nmlkj2. Tank overflow lines. nmlkj3. Fresh water return piping and condensate line. nmlkj4. Sea water lines to overboard. nmlkj

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73.What is part number 1 in this drawing ?

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1. A centrifugal pump. nmlkj2. A rotor screw pump. nmlkj3. A piston pump. nmlkj4. A screw compressor. nmlkj







1. A seal ring. nmlkj2. The pump shaft. nmlkj3. A ball bearing. nmlkj4. An end cover. nmlkj

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1. The pump shaft. nmlkj2. The cam shaft. nmlkj3. The distance piece. nmlkj4. The connecting rod. nmlkj







1. The gland packing. nmlkj

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2. The stuffing box. nmlkj3. A bearing. nmlkj4. A cooling pipe. nmlkj







1. The connecting rod. nmlkj2. The pump rotor. nmlkj3. The pump body. nmlkj4. A cooling pipe. nmlkj

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78.What is part No. 3 ?

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1. The bearing holder. nmlkj2. The end cover. nmlkj3. The shaft seal. nmlkj4. The pressure relief valve. nmlkj







1. The propeller. nmlkj2. The housing. nmlkj3. The diffuser. nmlkj4. The impeller. nmlkj

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79.What are the two main items in this drawing ?

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80.What type of pump is shown here?

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1. A compressor and an electric motor. nmlkj2. An electric motor and a screw pump. nmlkj3. A hydraulic motor and a pump. nmlkj4. A centrifugal pump and an electric motor. nmlkj

1. A piston pump. nmlkj

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81.What is shown in this drawing ?

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82.Which is the inlet ?

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2. A screw pump. nmlkj3. A centrifugal pump. nmlkj4. A vane pump. nmlkj

1. A screw pump. nmlkj2. A centrifugal compressor. nmlkj3. A vane pump. nmlkj4. A centrifugal pump. nmlkj

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83.What is part number 3?

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1. A. nmlkj2. B. nmlkj3. C. nmlkj4. D. nmlkj







1. The purifier. nmlkj2. The primary pump nmlkj3. The clarifier. nmlkj4. The suction filter. nmlkj

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84.Which is the outlet ?

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85.What is the component shown here ?

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1. A. nmlkj2. B. nmlkj3. C. nmlkj4. D. nmlkj

1. A Defector. nmlkj

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86.Which way will fluid pass through this valve ?

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87.What is item "S" ?

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2. A Constructor. nmlkj3. An Injector. nmlkj4. An Ejector. nmlkj

1. From B to A. nmlkj2. From A to B. nmlkj3. In either direction. nmlkj4. From A to C. nmlkj

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88.Which is the correct parts description list of this suction filter ?

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1. A mesh type strainer. nmlkj2. The sea suction valve of the pump. nmlkj3. A shut-off valve. nmlkj4. The automatic 15 ppm shut-down valve. nmlkj

1. 1 = Filter cover, 2 = Filter mesh element, 3 = Filter body. nmlkj2. 1 = Body cover, 2 = Cartridge, 3 = Cartridge housing. nmlkj3. 1 = Top cover , 2 = Filter, 3 = Cast steel pressure body. nmlkj4. 1 = Top sealing plate, 2 = Filter element, 3 = Cast Iron body. nmlkj

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89.What are items No. 2 and No. 6 called ?

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90.This in terms of overall pump performance, what is the most important negative effect if an impeller wear ring (No 6) is worn excessively ?

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1. Bearing sleeves. nmlkj2. Water throwing seals. nmlkj3. Impeller wear rings. nmlkj4. Impeller support rings. nmlkj







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91.What type of centrifugal pump is shown here ?

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92.What do you think would be the RPM of the electric motor driving this pump (Frequency on board is 60 Hz) ?

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1. The pump will absorb excessive power, motor overload. nmlkj2. The pumping efficiency deteriorates, less output. nmlkj3. The pump starts vibrating, bearing damage will occur. nmlkj4. The housing will be attacked by cavitation. nmlkj

1. Multi-stage, medium speed. nmlkj2. Floating, self balancing, single stage. nmlkj3. Self priming, single stage, high speed. nmlkj4. Single stage, high speed. nmlkj

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93.When are the high sea chests used ?

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1. About 2300 RPM. nmlkj2. About 1500 RPM. nmlkj3. About 1150 RPM. nmlkj4. About 870 RPM. nmlkj

1. When the ship is deeply laden at sea. nmlkj2. When the ship is in shallow water. nmlkj3. When the ship is in ballast condition. nmlkj4. When the ship is in polluted waters. nmlkj

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94.What type of filters are fitted to the high and low sea chest suction lines ?

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95.What is the purpose of item No4, fitted to this pump ?

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1. Perforated plate filters. nmlkj2. Mesh wire filters. nmlkj3. Ball flush filters. nmlkj4. Backflow filters. nmlkj







1. It is a bleed-off valve. nmlkj

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96.When pumping cold oil with this pump, what precaution would you take?

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97.What are items No. 6 on this pump ?

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2. It is a delivery control valve. nmlkj3. It is a filter. nmlkj4. It is a balance valve. nmlkj







1. Start/stop the pump frequently. nmlkj2. Throttle the discharge valve. nmlkj3. Scew back the spring pressure on the pressure regulating valve. nmlkj4. Throttle the suction valve. nmlkj

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98.What is part No. 1 of this pump ?

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1. The thrust plates. nmlkj2. The shaft bearings. nmlkj3. The shaft plates. nmlkj4. The axial plummer pads. nmlkj







1. A metallic type mechanical seal. nmlkj2. Main shaft locating bush. nmlkj3. Main shaft bearing. nmlkj4. The shaft locking collar. nmlkj

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99.What is item No. 1 of this type of pump lay-out ?

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100.What is item No. 4 on this pump assembly ?

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1. The pump coupling unit. nmlkj2. The pump shafting system. nmlkj3. The pump driving arrangement. nmlkj4. The intermediate shaft assembly. nmlkj







1. The outer casing. nmlkj

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101.How is the vertical clearance of the impeller in this pump casing adjusted ?

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102.Which pump parts are fitted in shaft assembly part No. 3 ?

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2. The reinforcement frame. nmlkj3. The motor stool. nmlkj4. The pump top casing assembly. nmlkj







1. By adjusting distance/ height by screwed connection 2 on shaft. nmlkj2. By fitting shims between motor shaft and intermediate shaft. nmlkj3. By fitting shims on pump impeller. nmlkj4. By fitting shims in coupled part, item No 2 on shaft. nmlkj

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103.If you need to replace the mechanical seal on this pump, which parts would you dismantle and remove in order to give access to the seal ?

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1. Mechanical seal, O-ring and water thrower. nmlkj2. Shaft sleeve and mechanical seal. nmlkj3. Mechanical seal and ball bearing. nmlkj4. Shaft sleeve and ball bearing. nmlkj







1. Remove motor and intermediate shaft, remove shaft flange. nmlkj2. Remove motor stool with motor and intermediate shaft complete.. nmlkj3. Remove pump casing half, release coupling and take out pump assembly. nmlkj4. Remove intermediate shaft and shaft flange, take out pump assembly. nmlkj

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104.When starting a centrifugal pump, in order to reduce the initial power surge, you should start the pump with ..............

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105.If it is noted after overhaul that the pump bearings overheat and it is verified that it is correctly assembled and no parts are touching, the reason could be................

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1. the suction valve closed. nmlkj2. the discharge valve closed. nmlkj3. throttled suction valve. nmlkj4. throttled discharge valves. nmlkj







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106.If the diameter of this valve is 60 mm on it's inner seat, what is the minimum fixed lift height ?

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107.What is the purpose of the screw cap (1) in the picture ?

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1. that the pump is not bled off properly. nmlkj2. there is insufficient liquid supply to the pump. nmlkj3. misalignment of the shaft. nmlkj4. an obstruction on the discharge side. nmlkj







1. 20 mm. nmlkj2. 15 mm. nmlkj3. 12.5 mm. nmlkj4. 10 mm. nmlkj

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108.What are items "W" ?

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1. To adjust the valve lift. nmlkj2. To access the valve. nmlkj3. To adjust the valve down if it is heard banging. nmlkj4. To manually close the valve. nmlkj







1. Ballast water tanks. nmlkj2. Hold deep wells. nmlkj3. Side water tanks. nmlkj4. Cargo hold bilge wells. nmlkj

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109.Here are some capacities of sea water pumps. Which pump would be the Fire and Ballast Pump ?

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110.Here are some capacities of engine room water pumps. Which one would be the Fresh Water Hydrophore Pump ?

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1. 410 m3/hour x 20 metres. nmlkj2. 110/410 m3/hour x 70/35 metres. nmlkj3. 140 m3/hour x 30 metres. nmlkj4. 40 m3/hour x 55 metres. nmlkj

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111.What type of pump do you think is used for the purpose shown here ?

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112.What is shown here?

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1. 5 m3/hour x 50 metres. nmlkj2. 0.5 m3/hour x 40 metres. nmlkj3. 5 m3/hour x 25 metres. nmlkj4. 40 m3/hour x 55 metres. nmlkj







1. A gear pump. nmlkj2. A piston pump. nmlkj3. A vane pump. nmlkj4. A worm wheel pump. nmlkj

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1. A Non return valve. nmlkj2. A Two way valve. nmlkj3. A Triple flushing valve. nmlkj4. A Dynamic valve. nmlkj

1. The pump bearing. nmlkj2. The mechanical seal. nmlkj3. The water throw ring. nmlkj4. Shaft locking ring. nmlkj

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1. The shaft key. nmlkj2. The shaft securing nut. nmlkj3. Impeller locking ring. nmlkj4. The shaft taper section. nmlkj

1. The lower shaft seal. nmlkj

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116.What is the purpose of Part No. 4 ?

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117.What is Part No. 6 ?

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2. The lower shaft bush. nmlkj3. The Impeller securing washer. nmlkj4. The impeller securing nut. nmlkj

1. To prevent liquid moving upward. nmlkj2. To hold the impeller and connect the motor. nmlkj3. To support the shaft. nmlkj4. To support the impeller. nmlkj

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118.What is Part No. 1 called ?

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1. The impeller wear ring. nmlkj2. The diffuser vanes. nmlkj3. The impeller blade. nmlkj4. The thrust washer. nmlkj

1. The diffusor. nmlkj2. The ejector. nmlkj3. The nozzle. nmlkj4. The sprayer. nmlkj

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119.Which part is the diffusor ?

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120.What is Part No. 5 called ?

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1. Part 1. nmlkj2. Part 2. nmlkj3. Part 3. nmlkj4. Part 4. nmlkj

1. The drain screw. nmlkj

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121.What are items No. 2 of this pump ?

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122.What are items "V" ?

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2. The volute chamber. nmlkj3. The nozzle securing screw. nmlkj4. The flange ring. nmlkj







1. The driven end bearings. nmlkj2. The shaft seals. nmlkj3. Shaft collars. nmlkj4. The shaft locating collars. nmlkj

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123.What type of valve is shown here ?

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1. Straight bilge gate valves. nmlkj2. Non-return screw down valves. nmlkj3. Vacuum suction boxes. nmlkj4. Vacuum flap valves. nmlkj

1. A gate valve. nmlkj2. A non-return valve. nmlkj3. A check valve. nmlkj4. A screw-lift valve. nmlkj

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124.Which types of tank gauging are fitted here, if: 1 = Float reading on the tank, 2 = Measure tape reading, 3 = Sight glass reading, 4 = Distance reading, 5 = Pneumatic gauging.?

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125.What kind of heat exchanger is drawn here ?

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1. 1, 3 and 5. nmlkj2. 2, 3 and 4. nmlkj3. 1, 2 and 3. nmlkj4. 2, 3 and 5. nmlkj

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126.In what kind of piping would you find this type of filter ?

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127.What is the most common cause of failure of reciprocating bilge pumps?

128.On a centrifugal pump what would happen if the priming pump float valve stuck in the closed position?

1. A single flow pipe tube heat exchanger. nmlkj2. A double flow or loop flow tube heat exchanger. nmlkj3. A finned bank block heat exchanger. nmlkj4. A plate battery heat exchanger. nmlkj

1. In fuel oil piping. nmlkj2. In sea water piping. nmlkj3. In starting air piping. nmlkj4. In bilge piping. nmlkj

1. Worn cylinder liner or bucket rings. nmlkj2. Leaking piston rod gland. nmlkj3. Debris holding suction or delivery valves open. nmlkj4. Malfunctioning priming pump. nmlkj

1. Pump would not prime. nmlkj2. Pump would not deliver pressure. nmlkj

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129.What item is essential to be fitted to a gear pump?

130.In a reciprocating pump what would NOT cause of loss of vacuum?

131.What would happen if a centrifugal pump priming pump had no water?

132.If the centrifugal pump delivery pressure is low which would NOT be the cause?

133.Before loosening pump covers how should the pressure be checked?

3. Priming pump would run hot. nmlkj4. Pump would run hot. nmlkj

1. Pressure relief valve. nmlkj2. Pressure adjusting valve. nmlkj3. Non-return suction valve. nmlkj4. Non-return discharge valve. nmlkj

1. Priming pump malfunction. nmlkj2. Worn cylinder liner or bucket rings. nmlkj3. Leaking suction/delivery valves. nmlkj4. Leaking piston rod gland. nmlkj

1. Pump would run hot. nmlkj2. Pump would not prime. nmlkj3. Pump would not maintain a vacuum when running. nmlkj4. Delivery pressure would be low. nmlkj

1. Excessive neck bush/shaft clearance. nmlkj2. Choked impeller. nmlkj3. Worn impeller. nmlkj4. Excessive impeller/wear ring clearance. nmlkj

1. Checking the pressure gauge. nmlkj2. Open and check vents are clear.

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134.If the priming pump was not working how could a vacuum be raised on a centrifugal pump?

135.Where can wear most affect efficiency in a gear pump?

136.Where is it necessary to use Screw Lift Valves?

137.If a centrifugal pump does NOT pull a vacuum what is the most likely cause?

138.After gear pump re-assembly what must be checked?

nmlkj3. Remove drain plug. nmlkj4. Remove cover slowly. nmlkj

1. Starting the pump with the discharge valve open. nmlkj2. Filling the pump by hand. nmlkj3. Starting the pump with the sea suction valve open. nmlkj4. Starting the pump with the suction valve closed. nmlkj

1. In the gear shaft bearings. nmlkj2. Casing/end gear clearance. nmlkj3. Gear backlash. nmlkj4. Shaft wear at gland. nmlkj

1. Fuel tank valves. nmlkj2. Ballast tank valves. nmlkj3. Bilge line valves. nmlkj4. Main sea suction valves. nmlkj

1. Impeller vanes choked. nmlkj2. Impeller/wear ring clearance excessive. nmlkj3. Neck bush/shaft clearance excessive. nmlkj4. Priming pump not functioning correctly. nmlkj

1. Suction valve is open.

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139.What advantage does the gate valve have over globe valves?

140.When taking over the engine room watch, what should you look for on all operating worm wheel or gear type pumps ?

141.What material are large tube, heat exchanger covers manufactured from?

142.When would the main sea circulating system high sea suction valves be used?

143.What are gauze element filters designed to remove?

nmlkj2. Direction of rotation is correct. nmlkj3. Gland is not tight. nmlkj4. Discharge valve is open. nmlkj

1. No flow obstruction when fully open. nmlkj2. Positive closing action. nmlkj3. Low maintenance. nmlkj4. Can be throttled. nmlkj

1. The pump casing temperature. nmlkj2. The pressure relief valve setting. nmlkj3. Vibration and noise free operation. nmlkj4. Free movement of the by-pass valve. nmlkj

1. Cast steel. nmlkj2. Cast iron. nmlkj3. Alloy steel. nmlkj4. Bronze. nmlkj

1. When the ship is deeply laden at sea. nmlkj2. When the ship is in shallow water. nmlkj3. When the ship is in ballast condition. nmlkj4. When the ship is in polluted waters. nmlkj

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144.What is the main advantage of a central sea water cooler system?

145.When on passage, what should be the condition of the fire main?

146.If when in port there is an urgent requirement to pump bilge water from the vessel, what would you do?

147.What would happen if the cooling water is shut off the atmospheric condenser?

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1. Fine non-metallic solids. nmlkj2. Metallic particles. nmlkj3. Water and sludge. nmlkj4. Coarse solids. nmlkj

1. Cheaper to install. nmlkj2. Ease of cleaning. nmlkj3. More efficient cooling. nmlkj4. Simple and short cooling water pipelines. nmlkj

1. Pressurised at all times. nmlkj2. Sea suction and fire main discharge valves open ready to pressurise the main when the fire pump is

started. nmlkj

3. Drained and empty to prevent leakage at hydrants. nmlkj4. All pump and isolating valves closed. nmlkj

1. Pump the bilges over the sides via the oily water separator. nmlkj2. Lower the bilges only during night time. nmlkj3. Pump the bilges only to a shore or barge reception facility. nmlkj4. Pump bilges in a dirty oil tank or sludge tank and note in logbook. nmlkj

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148.In thermodynamic terms what is a 'perfect fluid'.

149.Which of the following is the correct name for a void space between two tanks carrying different liquids ?

150.What must be fitted to the discharge of the pump in the drawing?

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1. Steam will blow from the air vent. nmlkj2. The hot well will steam up. nmlkj3. Overpressure will occur in the condenser. nmlkj4. All of the given options. nmlkj

1. Fluid that remains unchanged through a working cycle. nmlkj2. An inert gas. nmlkj3. A fluid that cannot be compressed. nmlkj4. Fluid that exhibits similar characteristics to fuel/air mixture. nmlkj

1. A bilge. nmlkj2. A drain tank. nmlkj3. A deep tank. nmlkj4. A cofferdam. nmlkj

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151.In the pump illustrated what separates the suction and discharge pressures?

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1. Pressure relief valve. nmlkj2. Non return discharge valve. nmlkj3. Manual by-pass valve. nmlkj4. Leak-off connection to cool the shaft gland. nmlkj

1. The mouth ring. nmlkj2. The mechanical seal. nmlkj3. The pump body seal. nmlkj4. The pump body cover seal. nmlkj

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1. 1. 2. 3. 4.

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151. 1. 2. 3. 4. nmlkji nmlkj nmlkj nmlkj

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EXAMEN BREVET OFITER MECANIC-MIAMH 2

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