GENERAL ENGINEERING KNOWLEDGE – MEO CLASS 4 MMD PAPER

SECTION 5

1. A high pressure differential in a main engine fuel oil filter onboard can be best reduced by
   1. Back flushing the filter manually
   2. Stopping the main engine to change the filter element
   3. Changing over to stand by filter if provided
   4. None of the Above

ANS.: A,C

2. A high pressure differential in a main engine fuel oil filter onboard can be best reduced by
   1. Back flushing the filter manually
   2. Stopping the main engine to change the filter element
   3. Changing over to stand by filter if provided
   4. None of the Above

ANS.: C

3. Inert Gas System should be capable of delivering Inert Gas at the rate of at least ________
   1. 110% of the maximum rate of cargo discharge capacity of the ship
   2. 133.33% of the maximum rate of cargo discharge capacity of the ship
   3. 125% of the maximum rate of cargo discharge capacity of the ship
   4. 90% of the maximum rate of cargo discharge capacity of the ship

ANS.: C

4. The static positive suction head of a pump is the
   1. distance of the suction liquid level above the center line of the pump
   2. distance the suction liquid level is below the center line of the pumps
   3. force necessary to overcome frictional losses in the pump and piping
   4. amount in inches of mercury the total suction head is below atmospheric pressure

ANS.: A

5. When overhauling engines in bad weather onboard
   1. Use additional lifting equipments
   2. Use heaving line to prevent moving of item
   3. Use chain block if required to restrain moving of parts
   4. None of the Above

ANS.: A,B,C

6. Two compressors should not be run in parallel because
   1. It is not efficient to run two compressors
   2. It will give over capacity in the system
   3. There is possibility of losing oil from the compressors
   4. A and B

ANS.: C

7. The term referring to the number of teeth per inch on a hacksaw blade is known as the
   1. Set
   2. rake
   3. pitch
   4. thread gauge

ANS.: C

8. The ash content of a fuel oil is significant to the operating engineer because it
   1. is an indication of the amount of noncombustible material present in the oil
   2. indicates the quantity of energy released by burning a unit amount of the fuel
   3. is useful for determining proper atomization temperatures
   4. reflects the overall thermal efficiency of the fuel oil service system

ANS.: A

1. Air conditioning system air handling units must have their air filters cleaned at regular intervals in order to prevent______
   1. Growth of microorganisms and bacteria harmful to human beings
   2. Restriction to air flow and hence reduced efficiency of the plant
   3. Growth of mites and other allergens
   4. All of the above

ANS.: D

10. Amount of distilled water produced in fresh water generator onboard decreases with
    1. Increase in vacuum in the fresh water generator shell
    2. Decrease in sea water temperature
    3. Decrease in efficiency of heat exchanger
    4. Increase in sea water temperature

ANS.: C,D

11. Before any work is to be carried out on a burner in an automatically fired auxiliary boiler, you should always
    1. block all control system relays closed
    2. allow the boiler to cool completely
    3. close all manually operated fuel valves
    4. lock all safety interlock switches closed

ANS.:  C 

12. Soot blowing of boilers onboard can be carried during
    1. Port operations
    2. Sailing
    3. During indications of a uptake fire
    4. Inerting operations in oil tankers

ANS.: B

13. Which of the following components in an Inert Gas system ensures that vapours are vented well clear of the working deck? i) High velocity vents ii) Mast risers
    1. Only i)
    2. Only ii)
    3. Both i) and ii)
    4. Neither i) nor ii)

ANS.: C

14. Which of the following is most suited to act as a deck air compressor?
    1. Lobe type
    2. Reciprocating type
    3. Screw type
    4. None of the above

ANS.:  C

15. Safety of Gas cylinders used for cutting and welding is ensured
    1. By fitting of flash back arrestor
    2. By using color codes for gas pipe connections
    3. By using trolleys when transferring cylinders
    4. All of the above

ANS.: D

16. Pumps impart energy to a fluid but the energy required to bring the fluid to the pump may be provided by________________
    1. Gravitational Head
    2. Atmospheric pressure
    3. Another pump
    4. Any one or a combination of above

ANS.: D

17. Injecting water into the combustion chamber of marine engines is a primary method of reduction of which of the following air pollutants?
    1. SOx
    2. Particulate matters
    3. Unburnt Hydrocarbons
    4. NOx

ANS.: D

18. In case of failure of control air supply ,some valves continue locked in the position they were at the time of failure . They are said to be-
    1. Fail-safe
    2. Fail -proof
    3. Fail-set
    4. Fail -blocked

ANS.: A

19. Old machinery space log book are kept in safe custody
    1. To refer and clarify in case of any query
    2. For purpose of internal and external audits
    3. To safeguard the chief engineer’s competence
    4. None of the Above

ANS.:  A,B

19. If the superheat value of a thermostatic expansion valve is set too low________
    1. The suction line of the compressor will be too hot
    2. The suction line of the compressor will be too cold
    3. The discharge line of the compressor will be too hot
    4. The discharge line of the compressor will be too cold

ANS.: B

20. Which of the following chemical compounds prevents caking of powder in dry chemical powder fire extinguisher?
    1. Sodium Stearate
    2. Sodium Bicarbonate
    3. Magnesium Stearate
    4. Magnesium Bicarbonate

ANS.: C