Welcome to your MEO Class 4 - MOTOR Test 1
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1
Which of the following statements is true?
2
Modern marine turbochargers use a ___________ type of compressor
3
Marine boilers burning H.F.O. face a problem of cold corrosion due to high sulphur content. The minimum flue gas temperature within any boiler part is kept above due point of H2SO4. The actual dew point of H2SO4 in flue gases depends on the:
4
Which of the following is a disadvantage of water as cooling medium for pistons, when compared to oil?
5
If an operating auxiliary boiler has a water pH reading of 7, you should
6
Which of the following statements is false?
7
Steam temperature control for the ESD-II boiler is achieved by :
8
Use of Halon as fire extinguishing medium has been discontinued because
9
Which of the following specifications/qualities of cylinder oils counter corrosive wear?
10
In a 2-stroke marine diesel engine if the o-ring for Jacket cooling water sealing is leaking then
11
Which of the following statements is true, about slow speed engines?
12
In case of 2-stroke marine diesel engines, the top part of the liner forming the combustion chamber experiences very high pressure induced mechanical stresses as well as high thermal stresses. Which of the following is a correctly designed liner for catering both the above stresses?
13
Which of the following is an example of a solid bearing?
14
What is meant by elastohydrodynamic lubrication?
15
If the boiler tubes are scaled on the water side then
16
The purpose of an air cooler in a supercharging system is to:
17
The advantage of tie rods over an engine without tie rods is that:
18
How is the concentration of dissolved oxygen in the feed water of an auxiliary boiler maintained at acceptable limits?
19
A large, low-speed, main propulsion diesel engine uses sea water to directly cool the
20
The waterWhich standards govern the specifications for supply of Residual Marine Fuels and Distillate Marine Fuels onboard merchant ships? from discharge side of the centrifugal pump is supplied as sealing water to the stuffing box for the pump shaft at:
21
Function of a de-superheater is to.
22
Any steering gear system alarm can only be successfully acknowledged from
23
In order for microbiological growths to thrive in a fuel tank it is necessary for
24
The coating which is provided on the valve stem of exhaust valves of modern marine diesel engines is of:
25
ESD stands for which type of boiler
26
It is a known fact that centrifugal pumps require priming for pumping liquids , as they cannot handle air and will lose suction due to air entry . But on the other hand T/Cs use centrifugal compressors for supercharging. Which of the following do you think makes a centrifugal compressor to pump air and behave differently than the centrifugal pumps?
27
In modern marine 2-stroke diesel engines, ________________ is sometimes used as a coating on the underside of the exhaust valve disc, to reduce the rate of hot corrosion.
28
Prior to lighting off a cold automatically fired auxiliary boiler, you should
29
If the combustion control system of an automatically fired auxiliary boiler fails to sustain burner ignition after a normal shutdown, you should check for a/an
31
What do you mean by surge limit of a turbocharger?
32
Even if there is an oil mist concentration inside a crankcase, and there is also a hot spot, crankcase explosion will only take place when
33
Irregular circumferential wear of liner due to diminishing neutralizing capacity of cylinder oil away from lubricating holes is known as:
34
After prolonged operation, jerk type fuel pumps wear on the top edge of plunger and edges of spill ports and helix due to erosion by high pressure fuel as it spills. This wear would result in
35
Some 4-stroke engines are fitted with a rotorcap on the cylinder head valves. For what reason?
36
Fins are installed on the generating tube surfaces in waste heat boilers to
37
For a two stroke engine two o-rings are provided on the liner. The function of the top o-ring is to ___________ and function of the lower o-ring is to ____________
38
Labyrinth seal fitted on the back surface of a compressor wheel of a turbocharger:
39
Why is it essential to renew turbocharger bearings after a preset number of hours of running even if the bearings are in seemingly perfect condition?
40
In a bypass type filtering system for a medium or high speed diesel engine, the lube oil bypassing the filter
41
Which of the following is a reasonable statement about water washing of turbine side of a T/C ?
42
Which of these fuel oil impurities can cause maximum abrasive damage?
43
In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low-alloy steels because
44
To check the setting of the over speed trip on a diesel powered generator, you would use a
45
Exhaust Grouping is required in case of ______________ turbocharging in order to
46
Which of the following conditions is responsible for the fuel oil to atomize when using a steam atomizer in an auxiliary boiler?
47
Crank web deflection readings will give a positive indication of
48
Which of the following statements correctly describes the phenomenon of surging in a 2-stroke crosshead type engine?
49
Which type of boiler burner has max turn down ratio?
50
The lube oil pump used in a diesel engine is a
