GENERAL ENGINEERING KNOWLEDGE – MEO CLASS 4 MMD PAPER

21. The primary advantage of a central cooling system is______________________
    1. A more simplified cooling circuit.
    2. Most part of the cooling system being fresh water based,corrosion is minimized
    3. It allows better control of temperatures by using fewer controllers
    4. All of the above

ANS.: D

22. Refractory damage in boiler furnace onboard is caused due to
    1. Presence of moisture in the boiler before startup
    2. Rapidly fluctuating temperatures inside boiler furnace
    3. Overheating of boiler tubes due to lack of heat transfer from tubes due to scale
    4. Boiler panting and vibrations

ANS.: A,B,D

23. Which of the listed conditions can lead to cavitation in a centrifugal pump?
    1. Vapor pockets formed in the suction flow stream
    2. Rough casing volute surfaces
    3. Worn wearing rings
    4. Heavy fluid in the flow stream

ANS.: A

24. A major controlling factor in the location of the condensate return piping from a heating system is/are
    1. the requirement for a gravity return
    2. the requirement for short laterals run
    3. the requirement to minimize conflict with headroom and other services
    4. all of the above

ANS.: A

25. To maximize the effectiveness of soot blowing onboard
    1. Ensure Boiler is firing at high load
    2. Ensure Boiler is firing at low load
    3. Ensure combustion parameters maintained normal
    4. None of the above

ANS.: A

26. Isolation of filters onboard prior to cleaning is done by
    1. Closing of inlet and out let valves
    2. Switching of the relevant pump and system valves
    3. Opening of drains and vent valves
    4. All of the above

ANS.: D

27. Which of the following type of pumps is most suited to act as Waste Oil Sludge Pump?
    1. Centrifugal pump
    2. Screw pump
    3. Gear Pump
    4. Progressive cavity pump

ANS.: D

28. In the Alcap principle of centrifugal separation______________________
    1. Water is only discharged when desludging is activated by the control unit
    2. The valve at the water outlet is opened periodically based on timer action
    3. The valve at the water outlet is opened on the basis of signal of water content to the control unit from the water transducer at the clean oil outlet
    4. The centrifuge works as a clarifier with no water outlet

ANS.: C

29. High pressure cut out of a refrigerant system can activate due to which of the following faults?
    1. Improper cooling due to a dirty condenser
    2. Overcharge
    3. Air in the system
    4. All of the above

ANS.: D

30. To prevent electric shock during electric arc welding
    1. Wear dry clothes
    2. Wear insulated shoes
    3. Keep first aid equipment ready
    4. None of the above

ANS.:  A,B

31. To prevent electric shock during electric arc welding
    1. Wear dry clothes
    2. Wear insulated shoes
    3. Keep first aid equipment ready
    4. None of the above

ANS.: A

32. A record of the types and strengths of steels used on a MODU must be included in the
    1. General plans
    2. Builder’s documentation
    3. Certificate of Inspection
    4. Construction portfolio

ANS.: D

33. Water hammer in a steam heating system can be caused by
    1. filling the auxiliary boiler with cold water
    2. steam admitted to a cold pipe
    3. filling the auxiliary boiler with hot water
    4. draining a soot blower line before cracking the steam supply valve

ANS.: B

34. What is a function of the wearing rings used in most centrifugal pumps?
    1. Absorb erosion of high velocity discharge stream
    2. Seal pump shaft against entry of air
    3. Isolate the discharge side from the suction side
    4. Dampen the turbulent discharge flow

ANS.: C

35. Which combination of the main shaft segments listed below, that are located furthest from the main engine, are connected by the inboard stern tube shaft coupling?
    1. Line shaft and thrust shaft
    2. Line shaft and stern-tube shaft
    3. Thrust shaft and stern-tube shaft
    4. Stern-tube shaft and tail shaft

ANS.: B

36. An auxiliary engine turbo-charger 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
    1. Continue to run the engine and wait for some time
    2. Stop the engine for a while and make some checks
    3. Reduce the load of the engine
    4. Run it on steady load to make some checks

ANS.: B

36. Which of the following can be done to reduce the cold corrosion of Main Engine cylinder liners using high sulphur fuel oil :-
    1. Increasing cylinder oil feed rate
    2. Using high TBN cylinder oil
    3. Increasing scavenge air temperature
    4. Decreasing cylinder oil feed rate

ANS.: A,B,C

37. Which of the following can lead to premature failure of roller bearings?
    1. Misalignment
    2. Contamination
    3. Shrinkage
    4. Over greasing

ANS.: A,B,D

38. WHICH PROCESS IS NOT DONE ON MILD STEEL?
    1. Hot plating
    2. Electrolysis
    3. Explosion bonding
    4. Metal spraying

ANS.: C

39. Boiler not starting in 2 -3 times, what we do,
    1. check fuel ignition system,
    2. check fuel burning system
    3. check furnace
    4. all of the above

ANS.: D