B． fuel injection pump √ C． crankshaft D． oil can
312.The _____ of the diesel oil must not exceed 120 degree Fahrenheit.
A． temperature √ B． pressure C． acid value D． viscosity
313.The _____ of the lubricant should be sufficient to hold the film together, but it should
allow the lubricant to flow easily. A． specific gravity B． viscosity √ C． acid value D． calorific value
314.The _____ chamber is enclosed between the cylinder head and piston.
A． lubrication B． injection C． cooling D． combustion √
315.The _____ or balance tank collects the re-circulated fuel oil.
A． buffer √ B． sump C． bilge D． overflowing
316.The _____ or balance tank collects the re-circulated fuel oil.
A． overflowing B． sump C． bilge D． buffer √
317.The _____ in the injector will lift at a pre-set pressure which ensures that the fuel
will atomize once it enters the cylinder. A． needle valve √ B． nozzles C． piston D． spring
318.The abbreviation BDC means _____.
A． Boston Diesel Company B． base circle diameter
C． switch board case D． bottom dead center √ 319.The abbreviation TDC means _____.
A． top dead center √
B． temperature difference center C． time delay dock D． top diesel company
320.The amount of lubricating oil in the drain tank should be checked by _____.
A． measuring B． sounding rod √ C． metering D． weighting
321.The auxiliary engine and a.cgenerator can be connected with _____.
A． cam B． crosshead C． bulge D． coupling √
322.The bearing shell generally has _____ for location and oil grooves round the center of
its axial length. A． tips B． tags √ C． lips D． keys
323.The bearing shells depend on the accuracy of _____ to held them in a truly circular shape.
A． the gap B． the clearance C． the bore √ D． the housing
324.The bed-plate is secured in the longitudinal direction by means of bolts known as _____.
A． end-chock bolts √ B． side-chock bolts C． through bolts D． tie rods
325.The bore of each cylinder is formed in a liner which can be _____ when worn out.
A． welded B． replaced √ C． drilled again D． bored
326.The burning of the fuel adds more heat to the air charge, causing it to expand and force
the engine piston to do work on the crankshaftWhat does “it” mean in this sentence? A． the burning B． the fuel
C． the air charge √ D． the engine piston
327.The cap and new shell are tightened up and then removed and the thickness of the wire
measured by _____. A． a bridge gauge B． a micrometer √ C． a thermometer D． a indicator
328.The carbon deposits on the piston crown and in the ring grooves _____.
A． should be scraped √ B． should be derusted C． should be drilled out D． to be brushed off
329.The cast iron _____ for the cross-head are attached to the top section and seal off the
crankcase.
A． cylinder cover B． cross-head shoes C． guide-ways √ D． scavenging boxes
330.The cast iron guide-ways for _____ are attached to the top section and seal off the
crankcase.
A． the connecting rod B． the cross-head √ C． the piston rod D． the air box
331.The cleaned heated oil, after passing through the centrifuges, is to be pumped to a _____.
A． settling tank B． service tank √ C． ballast tank D． drain tank
332.The common method of applying oil to the cylinder walls is by means of small pump assembled
in units, known as _____. A． mechanical lubricator √ B． lubrication function C． forced feed system D． bearing lubrication
333.The complete assembly of bedplate, A-frames and cylinder block is held together by _____
to form a rigid structure. A． tap-bolts B． jack-bolts C． tie rods √ D． fitted rods
334.The compressed air is admitted to each cylinder through a cam operated by starting air
valve when the piston has just passed its _____. A． BDC B． TDC √ C． BBDC D． ATDC
335.The compressed air is supplied by _____ to the air reservoirs.
A． compressors √ B． forced fans C． ventilators D． generators
336.The conclusion that mechanical efficiency is always _____ 100 per cent is correct.
A． small than B． more than C． little than D． less than √
337.The connecting rod large end bearing shell generally has tags for location and oil grooves
round the center of its axial length which correspond with grooves in the _____ through which oil is transmitted up the rod to lubricate the small end. A． connecting rod B． piston rod C． bearing housing √ D． none of the above
338.The cooler as the liquid becomes, _____.
A． the faster it will evaporate B． the slower it will condense C． the slower it will evaporate √ D． the faster it will flow
339.The cooling liquid used for the cylinder may be referred to as _____.
A． jacket water √ B． make-up water C． boiler water D． flushing water
340.The cooling of the piston is carried out by circulating _____ across the underside of
the crown and inside the ring belt or through specially shaped passages. A． sea water B． scavenging air C． lubricating oil √ D． fuel oil
341.The cooling water is in direct contact with the outer surface of the liner as a result
of which it is termed a _____. A． water liner B． wet liner √ C． dry liner D． drown liner
342.The cooling water jacket is common to all the cylinders but there are often _____ to
ensure that each cylinder receives the right amount and flow of water. A． dividing walls √ B． divided walls C． dividing liners D． divided jackets
343.The cooling water temperature _____ over a period of 8 hours, and then shut down.
A． should be gradually increased B． should be gradually reduced √ C． should be constantly kept D． should be varied up and down
344.The correct tightening is obtained by use of _____ to measure the extension given to
the bolts.
A． pressure gauges B． stretch gauges √ C． thermometers D． bridge gauges
345.The crank chamber oil _____.
A． can be recovered √
B． is only supplied to cylinders C． only feeds the main bearing D． is a kind of detergent
346.The crank pin journal is provided with large bores for _____.
A． lubrication B． cooling
C． balancing purpose √ D． ventilation