C． Remaining constant temperature D． varying speed
29. _____ is a source of power by which the diesel engine may operate.
A． Water energy B． Electrical energy C． Chemical energy D． Heat energy √
30. _____ is arranged for cleaning the lubricating oil in the system and clean oil can be
provided from a storage tank. A． A filter B． A centrifuge √ C． A distiller D． A generator
31. _____ is fully floating in both connecting rod small end and the piston skirt.
A． The piston rod B． The cross head pin C． The gudgeon pin √ D． The crank-pin
32. _____ is made of a boss with separated blades mounted into it.
A． A variable pitch propeller √ B． A variable pitch nut C． A fixed pitch parallel D． A fixed pitch screw
33. _____ is usually driven by the engine camshaft and supplies pilot air to the cylinder
air start valve. A． An air receiver B． An operating valve C． An automatic valve D． An air distributor √
34. _____ neutralizes the acid conditions and_____ cleanses the rings and grooves.
A． The detergency/the alkalinity B． The alkalinity/the detergency √ C． The inhabitant/the water
D． The additives/the distilled water
35. _____ or air venting arrangement is fitted to the fuel supply passage.
A． An air pump B． A compressor C． A fuel pump D． A priming √
36. _____ providing lubricating films, oil used in marine diesel engines have to remove heat
from oil cooled piston. A． Except for B． Beside C． Except
D． In addition to √
37. _____ the engines, the diesel engine is_____ used engine on board.
A． Between/more commonly B． Among/the most commonly √ C． Between/not more commonly D． Among/not the most commonly
38. _____ water is more expensive than fresh waterIt has high specific heat and low viscosity.
A． Distilled √ B． Distilling C． Boiling D． Boiled
39. _____ for the camshaft gear train is taken from a spur gear which for a six cylinder
engine is at the coupling end. A． The driven gear B． The drive √ C． The grease
D． The lubricating oil
40. _____ in what position the engine stops there will always be at least one of the cylinders
with its starting air valve open to admit compressed air to start the engine. A． Because B． Owing to C． For
D． No matter √
41. _____ is secured by means of side-chock bolts and end-chock bolts.
A． The bedplate √ B． The column C． The main bearing D． The double bottom
42. _____ usually helps to induce air movement to assist combustion.
A． Cylinder cover B． Main bearing C． The exhaust valve D． The piston movement √
43. _____ may have two emergency source of power, thus requiring two emergency switchboards.
A． Large passenger vessels √ B． General cargo ships C． Container ships D． Oil tankers
44. _____ supplies pilot air to control the cylinder air start valves.
A． An air compressor B． An indicator cock C． An air distributor √ D． A safety valve
45. _____ clearances in the main or crank pin bearings will sometimes be indicated by loss
of pressure in the lubricating system before any bearing knock is heard. A． Too larger B． Too smaller C． Excess D． Excessive √
46. A cast steel strong back is fitted in way of the combustion space to help absorb _____.
A． flame temperature B． fuel oil C． air movement D． gas forces √
47. A charge of fresh air is drawn into the engine cylinder and then _____ by the moving
piston_____ very high pressure. A． pressed/to B． pressurized/with C． pushed/in D． compressed/to √
48. A common trouble with the fuel pump plunger or fuel valve spindle is _____.
A． water leakage B． steam leakage C． oil leakage √ D． air leakage
49. A common trouble with the fuel pump plungers or fuel valve spindle is _____.
A． broken down B． stuck
C． oil leakage √ D． carbonized
50. A diesel engine is similar to a gasoline engine except that the former has no _____.
A． cross-head
B． cylinder C． connecting rod D． spark plug √
51. A diesel engines crankcase oil level is found to be too highYou should suspect that _____.
A． the engine was over filled B． there might be a fuel leak C． there might be a water leak D． all of the above √
52. A distance piece, known as a _____ may be interposed between the rod and the bearing
housing.
A． bearing shell B． bearing liner C． compression plate √ D． lead wire
53. A distance piece, with ground faces, known as a compression plate, may be interposed
between the rod and the beating housing, its thickness being chosen to ensure the correct _____.
A． compression pressure B． compression test C． compression ratio √ D． compression clearance
54. A distance piece, with ground faces, may be interposed between the rod and the bearing
housing, its thickness being chosen to ensure the correct _____. A． expansion ratio B． pressure ratio C． compression ratio √ D． clearance ratio
55. A governor automatically controls engine speed by regulating _____.
A． fuel supply √ B． firing order C． engine load D． oil level
56. A gudgeon pin in a trunk piston may be free to float and rotate, with _____ to limit
axial movement. A． split pins B． crankpins C． dipsticks D． circlips √
57. A heater in the circuit facilitates warning of the engine prior to ____ by circulating
hot water. A． starting √ B． stopping C． to start D． to stop
58. A high temperature alarm or _____ which will melt is used to guard against the explosion
of compressor air pipelines. A． a flame trap B． a relief valve C． a fusible plug √ D． a bursting cap
59. A hot air start pipe indicates that there is _____.
A． inefficient cooling
B． a leaking air start valve √ C． a clogged drain valve D． a leaking air bottle
60. A level gauge for a tank is to _____.
A． give the pressure B． give the contents √ C． give the shape of the tank D． give the accuracy level
61. A lubricant often has to perform many duties in any situation, in addition to its
fundamental job of_____. A． resisting oxidization B． reducing friction √ C． promoting moving speed D． developing inertia
62. A main bearing consists of two shells which are secured by means of studs and _____.
A． tie rods B． through bolts C． lead wires D． bearing caps √
63. A number of cylinder liners are enclosed in one cast iron casing to form a _____.
A． cylinder cover B． cylinder block √ C． cylinder frame D． bed-plate