Maintenance & Repair

Detailed Test - Wrong Answer Summary
Test Date: 07/14/2014
First Name: Kurt
Last Name: Adriano
Birthday: 06/05/1981
Nationality: Filipino
Academy:
Company: Seagull AS
Batch:
Candidate ID:
Department: Engine
Subject: Maintenance And Repair
One of the Main Engine cooling pumps is down for maintenance.
The rest of the cooling pumps are operating on full capacity with
minimum margins on the maximum temperature limit. What will
be the correct precaution or action to take at the end of the day?
Question Asked:
80
Student Answered: Don 't know
Should Answer: Operate the engine room on manual mode until the
cooling pump is in operation, switched in stand-by
mode.
How will continuous low load operation influence the service
interval of the cylinder covers on a 4-stroke engine?
Question Asked:
64
Student Answered: Don 't know
Should Answer: Reduce the service interval
How will continuous low load operation influence the service
interval of the cylinder covers on a 4-stroke engine?
Question Asked:
1396
Student Answered: Don 't know
Should Answer: Reduce the service interval.
After how many hours would you consider changing the
turbocharger bearings, even though all appears to be normal?
Question Asked:
1380
Student Answered: Don 't know
Should Answer: 12.000 hours.
After how many hours would you consider changing the
turbocharger bearings, even though all appears to be normal?
Question Asked:
325
Student Answered: Don 't know
Should Answer: 12.000 hours
You are going to overhaul a centrifugal pump in accordance with
the PMS. The pump is running under optimal conditions and
normally operated. Which of the following parts are expected to
deteriorate during normal operation and thereby be due for
renewal?
Question Asked:
2134
Student Answered: Don 't know
Should Answer: Ball bearings on the pump shaft, and wear rings on
pump housing or impeller.
We are taking a crankshaft deflection control of the engine. The
reason is:
Question Asked:
1836
Student Answered: Don 't know
Should Answer: to control the weardown of the main bearings.
It is very important to follow a maintenance schedule for purifiers.
Why?
Question Asked:
1435
Student Answered: Don 't know
Should Answer: To prevent serious damages on main components.
How often shall the oxygen analyser be calibrated? Question Asked:
2773
Student Answered: Don 't know
Should Answer: Prior to every plant start-up, following an 8 hour stop
It is very important to follow a maintenance schedule. Why? Question Asked:
1479
Student Answered: Don 't know
Should Answer: To prevent serious damages on main components.
Is it recommended to adjust the spring tension on the fuel valves
during operation to achieve:
Question Asked:
1404
Student Answered: Don 't know
Should Answer: Not recommended at all.
When carrying out piston overhaul, it is important to clean the
ring grooves properly. Why?
Question Asked:
344
Student Answered: Don 't know
Should Answer: To make sure gas pressure can enter freely on top of
and behind the piston ring
What will you do if the heat transfer capacity is dropping, and we
know that flow and heat energy corresponds to the specifications?
Question Asked:
1447
Student Answered: Don 't know
Should Answer: Use the "cleaning in place" arrangement to open the
heat exchanger for visual inspection and manual
cleaning.
The meaning of lapping a valve and valve seat is: Question Asked:
61
Student Answered: Don 't know
Should Answer: Grind the valve against the valve seat to obtain a
uniform sealing surface
Why must we never use grinding paste on the seating or on the
gliding surface of a needle?
Question Asked:
2776
Student Answered: Don 't know
Should Answer: Any remaining grinding paste will corrode on the metal
surface and after some time the needle will be damaged
Most of the engine makers recommend to change the cylinder
head gaskets each time a piston overhaul is carried out. Why?
Question Asked:
1401
Student Answered: Don 't know
Should Answer: To obtain a proper sealing and correct distance between
piston and cover in TDC position.
What will You do if the heat transfer capacity is dropping, and we
know that flow and heat energy corresponds to the specifications?
Question Asked:
1299
Student Answered: Don 't know
Should Answer: Use the "cleaning in place" arrangement or open the
heat exchanger for visual inspection and manual
cleaning.
What do you consider as the most important task after a piston
j ob ?
Question Asked:
368
Student Answered: Don 't know
Should Answer: A search inside the crankcase for tools and rags.
Most of the engine makers recommend to change the cylinder
head gaskets each time a piston overhaul is carried out. Why?
Question Asked:
69
Student Answered: Don 't know
Should Answer: To obtain a proper sealing and correct distance between
piston and cover in TDC position
If you are going to enter the engines crankcase (go inside), how
will you secure the engine after you have closed the main starting
air valve ?
Question Asked:
362
Student Answered: Don 't know
Should Answer: Engage the turning gear on the engine.
Why do we have to make sure that the plate pack is compressed to
the right measurement A, after insertion of plates?
Question Asked:
1443
Student Answered: Don 't know
Should Answer: To prevent serious damages to the plates.
Why is the tightening of the timing chain important? Question Asked:
351
Student Answered: Don 't know
Should Answer: To avoid high wear down of chain and chain wheel
tooth and a potential breakdown.
What is the meaning of the term "valve clearance"? Question Asked:
60
Student Answered: Don 't know
Should Answer: The clearance between the rocker arm and valve
pushrod.
Why is it important to slow down the main engine RPM while
water-washing the turbocharger?
Question Asked:
1390
Student Answered: Don 't know
Should Answer: Not to damage the rotor blades.
The plate heat exchanger is separated for cleaning. What will You
do if the plates are thick with scale or other organic material?
Question Asked:
1446
Student Answered: Don 't know
Should Answer: Put the plates in water with qualified cleaning
chemicals, and use soft brush, or high pressure cleaner
with care.
What will You do if the plate exchanger leaks after cleaning and is
back in service. (The measurement A is tightened to minimum
measurement.)
Question Asked:
1444
Student Answered: Don 't know
Should Answer: Dismantle the exchanger and check or renew the rubber
packings.
On routine daily inspection you notice that there is a light arching
between an alternator's carbon brushes and rotor sliprings, with
alternator operating at 70% load. Should you:
Question Asked:
49
Student Answered: Don 't know
Should Answer: Check the surface of the sliprings, polish if necessary
and bed in the brushes
When overhauling the cylinder covers on a modern 4-stroke
engine, is it important not to interchange inlet and exhaust valves?
Question Asked:
1397
Student Answered: Don 't know
Should Answer: Important due to different material and working
conditions.
If inspection or repair of the boiler is due, the plant has to be shut
down, and the boiler emptied for water. If time is available, which
of the following procedures are correct?
Question Asked:
2070
Student Answered: Don 't know
Should Answer: The boiler be allowed to cool down by its own after
shut down. Then pump the water out.
Why is it necessary to use the vacuum pump after major overhaul
of the reefer system?
Question Asked:
1314
Student Answered: Don 't know
Should Answer: To evacuate air and water out of the system in order to
prevent problem during operation.
During UMS rounds at night during a sea passage, and the duty
engineer discovers the main engine lube oil pump starter
"chattering" loudly. Should he:
Question Asked:
110
Student Answered: Don 't know
Should Answer: Switch over to the other pump and inform the CE of the
noise immediately.
What could be the reason to knocking in the engine? Question Asked:
2712
Student Answered: Don 't know
Should Answer: The gudgeon pin, big end-, or main bearing clearances
is too large.
During routine checking of an engine after start up it is
discovered that a pipe leading to a starting air valve is hot. Is this
due to;
Question Asked:
1817
Student Answered: Don 't know
Should Answer: A sticking start air valve.
The engine RPM drops because of: Question Asked:
2708
Student Answered: Don 't know
Should Answer: Faulty governor.
After water-washing the turbocharger exhaust side, the blower
starts to vibrate. What has happened?
Question Asked:
333
Student Answered: Don 't know
Should Answer: The rotor blades are damaged or the blades are not
properly cleaned
Why is it so important to suck back as much freon liquid as
possible from the evaporators, before You stop the compressor?
Question Asked:
1308
Student Answered: Don 't know
Should Answer: To avoid liquid coming back to the compressor during
start up.
What could be the reason to knocking in the engine? Question Asked:
2711
Student Answered: Don 't know
Should Answer: Fuel injection advanced too far due to incorrect
preinjection angle.
With full load on the main engine, the turbocharger tachometer
reads: Too low RPM. Why?
Question Asked:
1386
Student Answered: Don 't know
Should Answer: Pick up for tachometer is wrongly adjusted.
What could be the most probable cause to overheating of
bearings?
Question Asked:
2715
Student Answered: Don 't know
Should Answer: Lubricating oil temperature is too high.
The engine turns when starting air is supplied but does not start.
What could be the probable cause to this?
Question Asked:
2705
Student Answered: Don 't know
Should Answer: Air in the fuel oil system.
The lubricating oil on the exhaust side of the turbine blower gets
very dirty after only a few hours in service. What can the reason
be?
Question Asked:
332
Student Answered: Don 't know
Should Answer: Exhaust gas leaking into the oil chamber
You have a leak cylinderlier ( poor O -rings on a water cooled
compressor). Where is the leaking water most likely to go when
the compressor is running?
Question Asked:
2257
Student Answered: Don 't know
Should Answer: Into the crankcase and mix with the lube oil.
How do we recognize a leaking fuel injector during testing? Question Asked:
2775
Student Answered: Don 't know
Should Answer: If we have a sudden drop in pressure after the valve is
supposed to be closed, this is caused by a leak
A centrifugal pump fails to deliver water after being idle for some
time. There has not been carried out any maintenance on the unit
since last time it was operated. What could be the reason for the
malfunction?
Question Asked:
2126
Student Answered: Don 't know
Should Answer: The pump is not primed.
What could be the possible cause of an engine knocking? Question Asked:
1819
Student Answered: Don 't know
Should Answer: Any of the below
The bowl in a fuel oil separator opens unintentionally during
operation. What is the reason to this?
Question Asked:
2804
Student Answered: Don 't know
Should Answer: Strainer in operating water low-pressure side is
clogged.
You are experiencing large hunting on the fresh water cooling
system. What is the reason?
Question Asked:
348
Student Answered: Don 't know
Should Answer: You have a cracked liner, or cover.
On the air compressor's crankcase there is a small valve that lets
off overpressure. What do we have to do if this valve is letting of
pressure and oil moisture ?
Question Asked:
2260
Student Answered: Don 't know
Should Answer: Overhaul the compressor unit.
If fuel or diesel oil is leaking from our HP fuel oil pumps, and
penetrate into the lube oil system of the engine, the result may be:
Question Asked:
1833
Student Answered: Don 't know
Should Answer: It will destroy the properties of the lube oil and lead to
serious damage in our engine.
If an engine does not turn when the starting air is applied, what
could be the most probable cause?
Question Asked:
1818
Student Answered: Don 't know
Should Answer: Any of the alternatives.
When an overhaul is completed and the compressor is going to be
started for a test run, it is important that we:
Question Asked:
2261
Student Answered: Don 't know
Should Answer: check that we have an open discharge line all the way
to the pressure bottle.
On regular inspections of alternator windings it is found that
windings are always covered with a heavy oil film coming from
the atmosphere surrounding the auxiliary engine. After cleaning
with an approved solvent, what do you do?
Question Asked:
48
Student Answered: Don 't know
Should Answer: Improve material of intake air filters