Watch the video “Diesel Engine Maintenance: Preventing Catastrophic Engine Failure” and discuss the following topics.
[https://www.youtube.com/watch?v=qEyhsk0JTOo]
1. The lube oil changing
2. Refilling with fresh lube oil.
3. Piston examination.
TEST YOURSELF
TEST 1
1. What is a purpose of cylinder head safety valve?
a) A valve for safety stop (emergency) of the engine
b) For indication of engine being overloaded
c) To relieve high pressure in the cylinder to protect the engine from being damaged
d) To adjust the cylinder pressure to a safe working pressure.
2. The starting air valve is fitted for the purpose of:
a) Tuning the engine for staring preparations
b) To retard the engine revolution for maneuvering purpose
c) Bringing the engine up to full rpm to start the engine
d) Bringing the engine up to sufficient number of revolutions for combustion take place and engine to run.
3. When the temperature of lubricating oil is lowered, an increase will occur in:
a) Viscosity
b) Flash point
c) Pour point
d) Concentration of contaminants
4.During operation of the main engine, the heat absorbed by lubricating oil is removed by the:
a) Scavenge air cooler
b) Sump vents
c) Lube oil cooler
d) Any of the above
5. An excessive pressure drop across a lube oil strainer could indicate:
a) Any of the above
b) That the strainer is ok
c) That the strainer needs cleaning
d) That a relief valve is stuck open
6.Why is it important to keep the lub oil viscosity within safe limits?
a) To keep the oil protective film between moving metal surfaces
b) It is not important
c) To keep the additives in good condition
d) The lub oil has no influence on the oil’s lubrication ability
7.What could be the reason if the lub oil viscosity increases?
a) Heavy fuel oil leakage to the lub oil system
b) Water leakage to the lub oil system
c) The lub oil viscosity will not increase
d) High lub oil temperature
8.What could be the reason if the lub oil viscosity decreases?
a) Heavy fuel oil leakage to the lub oil system
b) Low lub iol temperature
c) Wrong lub oil pressure
d) Diesel oil leakage to the lub oil system
9.What are the compartments to be regularly checked with regard to water and oil leakages?
a) Tank top in the engine room
b) Bilge wells
c) Bilge tank(s)
d) All those listed in the other alternatives.
10.During standstill liquid may condense in the crankcase or oil separator. Why is it important to heat up the oil before start?
a) The compressor will run better
b) Compressor oil regulating system will operate better
c) To avoid the compressor oil to disappear from the crankcase during starting
d) It should never be done.
TEST 2
Answer "False" or "True".
- Both relieving and being relived engineers should make a joint inspection round.
- If the temperature of the generator stator or rotor increases suddenly or exceeds the prescribed limits the watch engineers are to call the chief engineer.
- "Defects caused by vibration" are one of the general classes of derangements likely to occur in operation of engines.
- As a concept, diesel electric propulsion (DEP) is not a new system.
- Steam engine alone is a usable machine.
- I.H.P. means Introduced horsepower.
- In general the bearing pressures are higher in the Diesel than in the steam engine.
- In tropical harbors the sea suction may be gripped by a jellyfish.
- Each ship has just one sea suction.
- Cracks in cylinders may result from unequal heating due to poor design, bad castings or air pockets in jackets.
- Cargo or bunker tanks which have been topped up should be checked frequently during the loading operations to avoid an overflow.
- Pollution can come from engine room bilges of all ships (not only tankers).
Keys to test 1: 1-b; 2-d; 3-a; 4-c; 5-c; 6-a; 7-a; 8-d; 9-d; 10-c.
Keys to test 2: 1-true; 2-true;3-false;4-true;5-false;6-false;7-true;8-false;9-false;10-true;11-true;12-true.
ПРИЛОЖЕНИЕ
Synonyms
недостаток
default
defect
deficiency
disadvantage
drawback
fault
failure
fuisance
weakness
иметь цель, ставить целью
to aim
to be concerned
to be directed
to be intended
to comprise
частично устранить недостаток
to improve
to lessen
to mitigate
to overcome
to reduce
to relieve
устранить недостаток
to cure
to deal with
to do away with
to eliminate
to get rid of
to improve
to remedy
to overcome
to solve
to surmount
cпециалист
an engineer
a skilled person
a worker in this field
one acquainted with
one familiar with the art
one skilled in the art
cинонимы к слову «относиться»
to be concerned with
to deal with
to be directed to
to be related to
to be relevance to
to pertain
to refer to
to absorb / to take up поглощать
to acknowledge / to confirm / to affirm подтверждать
accumulation / pilling / assemblage накопление, аккумуляция
to be apt / to be possible быть возможным
to be attached / to be fitted быть присоединенным
avoidance / evasion избежание
being relieved / offgoing механик, которого сменяют
to bind / to grip заедать
to be engaged / involved in заниматься чем-либо
complicated / complex сложный
derangement / fault / malfunction неполадка.
design / construction конструкция
to develop / to evolve / to expand развивать, расширять
to discharge / to use up / to run down разряжать
disrepair/failure плохое состояние, неиспраность
distinct / definite / plain явный, определенный
donkey boiler / auxiliary boiler вспомогательный котел
to enter into force / to come into force / to take effect вступать в силу
to familiarize / to acquaint (with) ознакомиться
frequent / rapid частый, повторяющийся
garbage / waste / refuse мусор
to grease / to lubricate смазывать
ground / basis / cause основание
hazard / danger угроза, опасность
to immerse / to plunge / to submerge погружаться в воду
impart / relate / disclose сообщать, передавать
implementation / execution / performance осуществление, выполнение
to investigate / to consider / to examine рассматривать, расследовать
in the vicinity / nearby по близости, в районе
to lift / to heave / to raise поднимать
looseness / slackness неплотность (крепления)
to lubricate / to smear / to oil смазывать
moisture / humidity / dampness влажность
objective / aim / goal цель
to occur / to happen возникать, случаться
to plug up / to clog / to obstruct засорять(ся)
rapid / prompt / fast быстрый
rare / uncommon / scarce редкий
reasonable / acceptable / admissible приемлемый
to refine / to purify / to clarify очищать
relieving engineer / oncoming сменяющий механик
to reveal / to show показывать, раскрывать
to rotate/revolve вращаться
to run off / flow down / trickle down стекать
probability / likelihood вероятность
shoal / shallow water мелководье
thoroughly / fully / completely полностью
tightness / seal плотность, герметичность
to top up / to fill up / to add доливать
volume/ capacity / bulk емкость, вместимость
БИБЛИОГРАФИЧЕСКИЙ СПИСОК
1. Борецкий В.В. Методические указания к практическим занятиям по дисциплине «Английский язык» для студентов III -IV курсов специальности «Эксплуатация судовых энергетических установок» дневной формы обучения (часть II) / В.В. Борецкий, Ю.А. Мороз, В.А. Стеценко. – Севастополь: Изд-во СевНТУ, 2007 – 64 с.
2. Китаевич Б.Е. Морские грузовые операции: Учебное пособие по английскому языку / Б.Е. Китаевич, А.И. Короленко, М.Л Калиновская. – М.: Росконсульт, 1999. – 160 с.
3. Писарева Л.П. Английский язык. Сборник текстов и упражнений для старших курсов специальности «Эксплуатация судовых энергетических установок» очной и заочной форм обучения / Л.П. Писарева. – Петропавловск-Камчатский: КамчатГТУ, 2006. – 92с.