Marine Engineer Guide Questionnaires 2 stroke engines
Fill in the blanks (Choose the correct answer from the choices below)
1._____________refers to Engines operating at 55 – 150 R.P.M working exclusively on a two stroke cycle are of crosshead construction which allows complete isolation of the cylinders and the crank case and are directly coupled to the propeller.Fill in the blanks (Choose the correct answer from the choices below
2.The __________acts as the main strength member maintains correct alignment and supports the weight of the components. It must be capable of withstanding the fluctuating forces created during operation and transmit them to the ships structure.
3.Unbalanced _______forces in the running gear are considered to be one of the forces acting on the bed plate.
4.____________ has the disadvantages that each block must be individually fitted, a time consuming process, and after fitting are susceptible to fretting and wear. ___________ are poured and therefore are much quicker to apply. They form into the shape of the clearance and key into surface imperfections.
5.The ________________ allows solid forged crankshafts to be produced with minimum energy and minimum need for post machining.
6._____________ is an antifriction metal alloy first produced by ___________ in 1839. In present-day usage the term is applied to a whole class of silver-white bearing metals, or “white metals.”
7.Otherwise known as the __________. These carry the crosshead guides and support the engine entablature (the cylinder block).
8.These are positioned at each transverse girder. They are intended to keep the transverse girder in compression at all times thus minimizing risk of fatigue cracking.____________
9.The most common method for applying the correct tension to the bolt is by use of ___________________________.
10.The purpose of the ________ is to translate reciprocating motion of the piston into the semi rotary motion of the con rod and so bearings are required.
11.Cylinder liners are generally made from ______________ because it is easily cast and has self lubricating properties due to the graphite flakes for some modern engines spheroidal graphite or nodular graphite is used.
12.As the piston passes down through the __________, the top set of scraper rings will scrape off the contaminated oil into the bottom of the scavenge space, where it is drained away via the scavenge drains.
13._____________ are exposed to maximum gas pressures and temperatures. They must therefore have adequate strength and cooling. This results in complex structures of strengthening ribs and cooling water passages.
14.The basic purpose of a ______ is to convert rotary motion into reciprocating motion in order to actuate some mechanism. For an engine this usually means the operation of a valve or pump.
6._____________ is an antifriction metal alloy first produced by ___________ in 1839. In present-day usage the term is applied to a whole class of silver-white bearing metals, or “white metals.”
7.Otherwise known as the __________. These carry the crosshead guides and support the engine entablature (the cylinder block).
8.These are positioned at each transverse girder. They are intended to keep the transverse girder in compression at all times thus minimizing risk of fatigue cracking.____________
9.The most common method for applying the correct tension to the bolt is by use of ___________________________.
10.The purpose of the ________ is to translate reciprocating motion of the piston into the semi rotary motion of the con rod and so bearings are required.
11.Cylinder liners are generally made from ______________ because it is easily cast and has self lubricating properties due to the graphite flakes for some modern engines spheroidal graphite or nodular graphite is used.
12.As the piston passes down through the __________, the top set of scraper rings will scrape off the contaminated oil into the bottom of the scavenge space, where it is drained away via the scavenge drains.
13._____________ are exposed to maximum gas pressures and temperatures. They must therefore have adequate strength and cooling. This results in complex structures of strengthening ribs and cooling water passages.
14.The basic purpose of a ______ is to convert rotary motion into reciprocating motion in order to actuate some mechanism. For an engine this usually means the operation of a valve or pump.
- CAM
- “A” FRAMES
- BEDPLATE
- STUFFING BOX
- BABBITT METALS
- HIGH SPEED DIESEL ENGINES
- CYLINDER HEADS
- ISAAC BABBITT
- SLOW SPEED DIESEL ENGINES
- GREY CAST IRON
- GRAIN FLOW METHOD
- CRANKSHAFT
- CROSSHEAD
- RESIN CHOCKS
- CONNECTING ROD
- HYDRAULIC JACKS
- STEEL CHOCKING
- TIE RODS
- INERTIA
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