1. Super
chlorinating of fresh water tanks in dry dock is done by:
A. Washing
the tanks with 100ppm chlorine solution
B. Washing
the tanks with 50ppm chlorine solution
C. Leaving
a 50ppm chlorine solution in the tank for 4 hours before flushing with clean
water
D. Leaving
a 50ppm chlorine solution in the tank for 24 hours before flushing with clean
water
2. A
ball valve is found leaking in service and needs to be overhauled. What type of
repairs can be carried out?
A. The
ball and seat can be lapped together
B. The
ball can be machined while the seat can be replaced
C. Normally
both the non-metallic seats get worn out and have to be replaced
D. Normally
ball gets damaged and has to be replaced
3. Which
of the following can lead to premature failure of roller bearings?
A. Misalignment
B. Contamination
C. Shrinkage
D. Over
greasing
4. Resistance
to corrosion of Aluminium alloys is due to :
A. Aluminium
being a very noble metal when compared to other metals in Electrochemical
series
B.
Formation of Aluminium oxide(Alumina) passive film on
surface
C. The
rate of corrosion is very low due to very high corrosion potential
D. All
of the above.
5. For
the S.W. side of a M/E L.O. cooler it is noticed that rise in S.W. temperature
through the cooler has decreased from 12 deg. C to 7 deg. C over a period of
time, while the drop in temperature of L.O. across the cooler has also
decreased. All other coolers have been reported to be working normal & M/E
is also running at a constant load in calm weather. What is the inference drawn
by decrease in the temperature difference?
A. The
cooling S.W. inlet temperature has reduced
B. The
efficiency of the cooler has increased over a period of time
C. The
cooler has become dirty on the S.W. side or L.O. side
D. S.W. side of the cooler may be
partially blocked with mud and sea shells
6. Graphitisation
is the term used to describe:
a) Bimetallic
corrosion of brass and bronze alloys leading to deposition of graphite
b)
Selective phase corrosion of grey cast iron leading to
corrosion of graphite flakes and leading to loss of strength
c) Electroplating
process in which graphite is deposited on the mild steel components to protect
them against corrosion
d) Chemical
reaction between pure graphite and iron so as to increase the graphite content
of iron
7. Accelerated
corrosion due to removal of protective surface films (e.g.) oxide layers on
metal/alloy surfaces due to turbulence of working fluid is known as
a) Bimetallic
corrosion
b) Impingement
corrosion
c)
Cavitation erosion
d) Selective
phase corrosion
8. When
one of the M/E F.O heater is not in use, then:
a) The F.O. inlet &
outlet valves should be kept shut, by steam heating valves should be kept crack
open, so as to keep the heater warm
b) F.O inlet &
outlet valves should be kept shut, steam heating valves also should be
completely shut and heater should be drained of any remaining F.O
c) F.O inlet and outlet valves should be kept crack open so that the
F.O recirculation through the heater can take place
d) F.O inlet valve
should be kept shut while the outlet valve should be left open, so that heater
can be put into use as fast as possible in case required
9.
After over
hauling reciprocal pump the motor connections were wrongly given. Determine
outcome when pump is started?
A)
The
direction of flow will remain unaffected
B)
the direction of flow will be reversed
C)
The pump will get damaged because the suction valve
will block the reverse flow causing overpressure leading to pump breakdown.
D)
The pump will lose suction N there will be no flow.
10.
Sludge
pump suction pressure is going full vacuum when u start the pump taking water
of double bottom tank suction u have checked the suction filter N found in
clean condition. Taking suction from fuel oil sludge tank does not happen.
Causes of the problems.
A)
Pump is not working efficiently n reqd. overhauling
B) F.O sludge tank suction valve
is leaking
C)
W.O. tank D.B. tank suction pipeline has a
blockage.
D)
Can’t say what is the problem but definitely the
pump needs to be opened up for overhaul
11.
Which of the following is a true statement (single
choice)
A) Aluminium will be subject to
preferential corrosion when in electrical continuity with stainless steel in
presence of an electrolyte.
b) Stainless
steel will be subject to preferential corrosion when in electrical continuity
with mild steel in presence of an electrolyte.
C) Copper
will be subject to preferential corrosion when in electrical continuity with
stainless steel in presence of an electrolyte
d) Aluminium
will be subject to preferential corrosion when in electrical continuity with
zinc in presence of an electrolyte.
12.
Surface preparation of steel surfaces, prior
carrying out painting isimportant because (choose the best alternative):
A. Any rust and contaminant inclusions may cause local paint
film breakdown
B. Too much paint will be consumed if surface preparation
is not carried out
C. Surface
will be very rough if proper surface preparation is not carried out
D. Surface preparation deposits a chemical onto steel
surface which reacts with paint film and causes
strong bonding
13. In refrigeration circuit, the data logger will record
what?(multi choice)
1. Room temperature
2. Recharge
temperature
3. Liquid line
temperature
4. Solenoid valve operation
14. A ball valve was found leaking in service. Upon
inspection it was found that the PTFE seat had worn out and was renewed. The
valve stopped leaking in closed condition. How do think a ball valve provides
perfect sealing?
A. The seat fitted is slightly smaller
than the outer dimensions of the ball, thus providing interference fit when
closed
B. Either a floating seat is pressed
onto trunnion supported ball by liquid pressure or floating ball is pressed
onto the seat
C. Ball is not exactly spherical and is
shaped such that during closure the surface coming into contact with seat is of
slightly bigger diameter providing sealing
D. Seat is not exactly
spherical, but slightly tapered so that during closure the ball sits tightly on
the seat
15. After
maintaining correct discharge pressure, soon ceases to discharge water what are
possible cause?
A. Pressure
gauge wrong
B. Pump sucking
air
C. Discharge
valve throttled
D. Casing wear ring is worn
ANS IS B OR C
16. An auxiliary
engine turbo-charged makes strange noises when the load changes. The engine
parameters however are absolutely fine. An external examination of turbocharger
parameters as stated in the manual also reveals nothing. Would you
(a) Continue to run the engine and
wait for some time
(b) Stop the
engine for a while and make some checks
(c) Reduce the
load of the engine
(d) Run it on
steady load to make some checks.
17. During prolonged
astern manoeuvring of the relative expansion between any of the turbine its
casing is likely to increase for an
alarming level you should (multi choice) in photo no3 in download
A)
Inform
the bridge that no further manoeuvring is possible as the turbine are likely to
be damaged
B)
Reduce
the vacuum further to control the relative expansion
C)
Keep
manoeuvring irrespective of damage to the turbines
D)
Request
the bridge to try to reduce number of astern movements
18. Cold and viscous
lubricating oil of an auxiliary engine is most likely to cause ___________
A)
Sudden
stopping of the engine
B) Difficulty in starting the engine
C)
Rhythmic
knocking sound from inside the engine
D)
Drop
in RPM of the engine
19. Normally so
called??? Single screw pumps??? Are used as sludge pumps in engine room. What
is correct technical name of these pumps?
a)
Snake
pump
b) Screw pump
c)
Progressive
cavity pump
d)
Gerotor
pump or gyrator pump
20. Vacuum priming
pumps which work on the principle of fixed vane pumps require _____________
for___________ clearance between vane tips and casing.
A. Lube oil,
lubricating
B. Lube oil,
sealing
C. Water, sealing
D. Gland
packing, sealing
21. viscosity
of fuel oil used for ME was 145cst,new fuel comes whose viscosity was more than
earlier, what should u do
a) increase
temp setting
b) change setting of viscotherm
c) do
nothing
d) open
steam valve manually more
22. Refer cooling
tubes act as self-cooling & expansion by
a)
Straight
tube
b)
U
tube
c)
Spring
tube
d)
a)
Spring
type
b)
Floating
type
c)
Fixed
tube
d)
U
tube
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