MEO Class 4 MCQS

1.Surface preparation of steel surfaces , prior carrying out painting is
important 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

2.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
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

3. Copper tubing is used in refrigerant system because
A) It has less internal resistance
B) It is cheaper compared to other materials.
C) It is easier to check leaks in copper based system
D)None of the above

4. When pressure inside a system falls below that of the vapour pressure of the liquid
Cavities r formed, cavities travelling to high pressure region collapses releasing
Considerable energy damage the metal surface which is known as
A) Cavitation
B) Erosion
C) Impingment Corrosion
D) Cavitation Erosion

5.Which of the following is a correct point for sampling of system lube oil for on board or shore
A. Standpipes
B. Purifier outlets
C. Inlet or outlet of L. O. coolers
D. Tank drains

6.After maintaining correct discharge pressure , soon ceases to discharge water what are possible
A. Pressure gauge wrong
B. Pump sucking air
C. Discharge valve throttled
D. Casing wear ring is worn

7. Which of the following V/V cannot be overhauled in place without removing piping?
A) BallValve
B) Diaphragm valve
C) Globe valve
D) Butterfly valve

8.The ballast valve of the fore peak tank is located in the duct keel andcannot be opened or shut by
remote operation. The valves of othertanks can be operated remotely without any trouble Which of the
following will be the best practice?
A. Valve should be checked locally for troubleshooting without which it is difficult to find the
exact problem
B. The actuator must be defective and should be replaced with a new one
C. The control circuit is defective and the PCB should be replaced
D. Shore assistance will be required in such cases

9.It has been reported that Engine room bilge pump was unable to take suction from Fwd. (P) bilge well
while it taking suction efficiently from Fwd.(S) & aft bilge wells. What could be the most probable cause?
A. There is leakage in the bilge suction pipeline somewhere between the bilge wells and bilge pump
B. The Fwd. (P) bilge well suction valve might be leaking
C. The Fwd. (P) bilge well suction filter cover gasket might be leaking
D. The pump needs to be overhauled

10.Chromium is a nobler metal when compared to that of steel . In some marine applications Chromium
is electroplated to the steel surfaces . Why?
A. Chromium is a more noble metal so it will not get corroded and thus steel surfaces will remain
B. Chromium plating provides corrosion protection as well as high glossiness and high hardness for better
wear resistance and reduced friction to the steel surfaces
C. Chromium plating is required for providing high glossiness and high hardness for better wear
resistance and reduced friction to the steel surfaces and not for corrosion protection
D. Chromium reacts with steel to form an alloy during electroplating which is corrosion resistant

11.Increasing the rotational speed of a cargo pump the pump flow rate will:
A. Increase in direct proportion to the increase in speed
B. Decrease in direct proportion to the increase in speed
C. Flow rate
D. Flow

12.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

13.The flow rate through a F.O. transfer pump will not be affected by which of the following factors?
A. Low F.O. temperature
B. Low sounding in F.O. tank
C. Internal leakage within the pump
D. Leaking discharge valve

14.Which of the following can be done to reduce the cold corrosion of Main Engine cylinder liners using
high sulphur fuel oil :-
A. Increasing cylinder oil feed rate
B. Using high TBN cylinder oil
C. Increasing scavenge air temperature
D. Decreasing cylinder oil feed rate

15.The suction pressure gauge of the Engine room bilge pump is brokenand you don???t have a spare.
Chief Engineer has asked you totroubleshoot the problem with Bilge pump not taking suction
from Fwd.(P) bilge well. You try taking suction from Fwd. (S) & Aft Bilgewell and find that pump is taking
good suction. Thereafter you Try suction from Fwd. (P) bilge well for sometime after priming with Sea
Water but there is no change in level. You inspect the suction filter of the pump and find that it is very
difficult to remove the same,you had to apply too much of force to lift the filter cover while normally it
comes out easily. What does it indicate?
A. It does not indicate anything, sometimes the filter covers are difficult to remove.
B. It indicates that the suction valve of the Fwd. Bilge Pump is leaking
C. It indicates that the suction filter of the Fwd. (P) bilge well is clogged completely
D. Pump suction filter might be clogged

16.Pump driven clutch type attached vacuum pumps are commonly used for priming ballast pumps and
emergency fire pumps. What is the factor which clutches the vacuum pump clutch to the pump clutch
during start of the pump?
A. Low suction pressure acting against the spring loaded clutching piston
B. High suction pressure acting against the spring loaded clutching piston
C. Low discharge pressure acting against the spring loaded clutching piston
D. High discharge pressure acting against the spring loaded clutching piston

17.It is given that engine room bilge pump has suction manifold on which 3 valves are located. One valve
for the 3 engine room bilge wells suction, another one for Bilge tank suction and the third one is for sea
water suction. It is found that the Bilge pump is unable to take suction from any of the bilge wells, but is
able to take suction efficiently from Bilge tank. What is the most probable cause?
A. Pump suction filter cover gasket leaking
B. Suction filter cover gasket of one of the Bilge wells is leaking
C. Bilge well suction pipeline leaking between individual bilge well valves and suction manifold valve
D. Bilge pump suction pipeline leaking between the manifold and the pump

18: In reference to accidental oil pollution, the most critical time during bunkering is when ________
a. you first start to receive fuel
b. hoses are being blown down
c. final topping off is occurring 
d. hoses are being disconnected

19: When giving mouth-to-mouth rescue breathing to an adult, you should breathe at the rate of how many
breaths per minute?
a. 4 
b. 8
c. 12 
d. 20

20: An inert gas system installed on a tanker is designed to __________.
a. aid in the stripping and cleaning of cargo tanks
b. increase the rate of discharge of cargo
c. force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere
d. lower the oxygen levels inside cargo tanks, making explosion nearly impossible

21: Your ship is sinking rapidly. A container containing an inflatable liferaft has bobbed to the
surface upon
functioning of the hydrostatic release. Which action should you take?
a. Cut the painter line so it will not pull the liferaft container down.
b. Swim away from the container so you will not be in danger as it goes down.
c. Take no action because the painter will cause the liferaft to inflate and open the container.
d. Manually open the container and inflate the liferaft with the hand pump.

22: The atmosphere in a tank is too lean if it is __________.
a. incapable of supporting combustion because the hydrocarbon content is below the LFL (Lower
Flammable Limit)
b. capable of supporting combustion because the hydrocarbon content is above the UFL (Upper
Flammable Limit)
c. capable of supporting a fire once started
d. not safe for ballasting

23: Inflatable liferafts are less maneuverable than lifeboats due to their __________.
a. shape 
b. shallow draft
c. large sail area 
d. All of the above

24: What is the generally accepted method of determining whether the atmosphere within a cargo tank is
explosive, too rich, or too lean to support combustion?
a. Use the open flame test on a small sample that has been taken from the tank.
b. Send a gas sample ashore for laboratory analysis.
c. Enter the tank with an oxygen analyzer.
d. Use an explosimeter

25: Before using a fixed CO2 system to fight an engine room fire, you must __________.
a. secure the engine room ventilation
b. secure the machinery in the engine room
c. evacuate all engine room personnel
d. All of the above

26: You are fighting a fire in the electrical switchboard in the engine room. You should secure the power, then
a. use a portable foam extinguisher
b. use a low-velocity fog adapter with the fire hose
c. use a portable CO2 extinguisher
d. determine the cause of the fire

27. The minimum concentration of a vapor in air which can form an explosive mixture is called the
a. auto-ignition point
b. flash point
c. lower explosive limit (LEL)
d. threshold limit value (TLV)

28: The deck water seal of the inert gas system __________.
a. cools the inert gas and prevents soot from entering the cargo tanks
b. acts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in
the hazardous zone
c. prevents the backflow of hydrocarbon gasses into nonhazardous areas
d. relieves sudden large overpressures in the system

29: The explosive range of petroleum vapors mixed with air is __________.
a. 0% to 1% 
b. 1% to 10%
c. 10% to 15% 
d. 12% to 20%

30: Fuel oil tank vents are fitted with a screen which will stop __________.
a. oil from flowing out of the tank vent
b. air from entering the tank vent
c. vapors from leaving the tank vent
d. flames on deck from entering the tank vent

31: Appointment of a designated person ashore (DPA) is a requirement under which of the following instruments?

A. STCW code

B. ISPS code

C. Marpol 73/78

D. ISM code (correct)

32:Minimum number of lifebuoys that need to be carried on cargo ships of length 200 m and above is_______________

A. 24

B. 18

C. 14

D. 12


33: The validity of which of the following certificates is not 5 years?

A. Safety equipment certificate.

B. Load line certificate.

C. Tonnage certificate(correct)

D. Safety radio telegraphy certificate

34:Under the Indian Merchant shipping act 1958, the maximum number of members that can be appointed by the Central Government of India to the National Shipping Board is:

A. 6

B. 16(correct)

C. 4

D. 2

35: Appointment of a designated person ashore (DPA) is a requirement under which of the following instruments?

A. STCW code

B. ISPS code

C. Marpol 73/78

D. ISM code

36: which is considered safest protection from static electric disharge when connecting or disconnecting cargo hoses or metal arms??

a.insulating flange or length of non conducting hose.(correct)

b.switching off iccp

c.ship shore bonding cable use.

d.none of the above

37: annex I regulation 12 sludge takes concentration:

A. Bilge pump to OWS

B. No line direct connection to OBD other than discharge give in regulation 13(correct)

C. No direct connection to OBD

D. Have direct connection to OBD all the valve to be close and sealed

38: Which of the following kinds of total flooding system is most suited for very large spaces like car carrier car decks?

A. High pressure multi cylinder type CO2 installation

B. Low pressure bulk storage tank type CO2 installation(correct)

C. Low expansion foam systems

D. Fixed pressure water spraying systems

39: As per Indian Merchant Shipping Act, 1958, which of the following entries should be made in official log book of ships?

A. Every case of illness, hurt or injury to a member of the crew

B. Every case of death on board

C. Every birth happening on board

D. All of the above(correct)

40: In firefighting the term PROTECTING EXPOSURES means

A. protecting firefighters from the direct exposure to heat

B. keeping flames from burning at the tank vents

C. protecting exposed area of the superstructure from flames

D. taking measures to prevent the spread of fire from the involved compartment to an adjacent compartment(correct)

41: The maximum capacity of an Oil fuel tank for any ship built on or after 1st Aug. 2010 as restricted by Marpol, Annex 1 is:

A. 600 m3

B. 1200 m3

C. 2500 m3(correct)

D. 3000 m3

42: What is added to Co2 cylinder to avoid from freezing at subzero temp in an inflatable liferaft?


2)Silica Gel


4)none of the above

43: Under ISM code ,who on board is responsible for reviewing and suggesting changes to SMS:

a. Chief Engg.

b.Chief Mate


d. Designated Safety Officer(correct)

44: Subsequent to a oil spill in Engine Room and ingress of oil in the bilge wells ,the best course of action is to _______________________________

A.Use oil spill dispersant chemical in the bilge wells

B.Transfer the oily mixture and let it settle in the bilge holding tank/bilge separator tank..

C.Transfer the oily mixture using a portable pneumatic pump to a waste oil tank and then physically demuck and clean the bilge wells using environment friendly cleaner(correct)

D.Dilute the bilge wells by flooding with water and then use the general service pump to pump out the bilges

45: Safety standards and guidelines for helicopter operations and rescue can be found in the:

A. Training manual

B. Safety manual

C. International Civil Aviation Organization (ICAO) publication

D. International standards of maritime search and rescue(correct)








47: Freight paid by charterers on a quantity of cargo short-shipped, i.e quantity agreed upon but not loaded by the charterer, is called:

A. Pro-rata freight Pro rata freight is an ancient form of settling payment for carriage of goods by sea when ship was not able to reach her final destination,

B. Back Freight A payment that is owed to a maritime shipping company when the transportation of goods extends beyond the contracted destination …

C. Dead freight Charge payable on space booked on a ship but not utilized by the charterer or the shipper(correct)

D. None of the above



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