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Auxiliary diesel engines can be automatically shut down as a result of ()
A . low lube oil temperature
B . low lube oil pressure
C . high exhaust temperature
D . high cooling water pressure
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An indication of a diesel engine air intake being partially clogged, is ().
A . low firing pressure and low exhaust temperatures
B . low firing pressure and normal exhaust temperatures
C . high firing pressure and low exhaust temperatures
D . high firing pressure and high exhaust temperature
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If the turbocharger failed on an auxiliary diesel engine, which of the following conditions would probably occur?()
A . Full power cannot be developed
B . The exhaust will contain black smoke
C . Complete combustion will be impossible
D . All of the above
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In an auxiliary diesel engine, the reason for knurling the piston skirt is to()
A . improve skirt lubrication
B . allow for expansion
C . transmit forces evenly
D . improve the piston seal
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If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be ()
A . a glazed surface on the spring
B . nicks in the protective coating
C . a build up of sludge deposits
D . cracks in the surface of the spring
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An electric heater built into some smaller diesel engines is used to ().
A . raise lube oil viscosity for easier starting in cold weather
B . increase air inlet temperature
C . increase compression ratio
D . increase jacket water temperature for easier starting in cold weather
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Fuel oil contamination of an auxiliary diesel engine lube oil can result in()
A . an increased flash point
B . higher lube oil pressures
C . an increased viscosity
D . lower lube oil pressure
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If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should()
A . check the air filter for obstruction
B . check for an exhaust leak
C . check the exhaust temperature
D . secure the engine
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A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in ()
A . ignition lag
B . engine horsepower
C . lube oil system pressure
D . specific fuel consumptio
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An auxiliary reservoir for starting auxiliary engines should be kept at ().
A . low pressure at all times
B . full pressure at all times
C . low pressure at intermittence
D . full pressure at intermittence
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What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?()
A . Spark plug
B . Heat of compression
C . Carburetor
D . Glow ping
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White smoke exhausting from an operating diesel engine may indicate ().
A . a cracked liner
B . burning lube oil
C . an overloaded engine
D . insufficient combustion air
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Before starting a diesel engine that has an engine driven lube oil pump, the engineer should ().
A . open the bypass line
B . cut in the lube oil cooler
C . pressurize the lube oil system
D . top off the expansion tank
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An over-speed trip stops a diesel engine when the engine ()
A . runs out of fuel
B . has low lubricating oil pressure
C . exceeds a set maximum speed
D . has high cooling water temperature
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When using a fuel with a higher than normal sulfur content in an auxiliary diesel engine, you should()
A . maintain higher than normal jacket water temperature
B . change the lube oil more frequently than normal
C . maintain a higher air-box temperature than normal
D . maintain a higher air-box pressure than normal
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Worn main bearing will cause the compression ratio of an auxiliary diesel engine to()
A . increase
B . decrease
C . remain the same
D . increase on compression decrease on expansio
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Excessive valve lash in an auxiliary diesel engine will cause the valves to open()
A . later and close sooner
B . sooner and close later
C . sooner and close sooner
D . later and close later
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If an auxiliary diesel engine frequently stalls, the trouble may be caused by ()
A . low exhaust back pressure
B . air in the fuel system
C . gasket blow-by or leakage
D . incorrect assembly of idler spring
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A turbocharged diesel engine will have an intake manifold pressure()
A . constantly decreasing as engine load increase
B . constantly increasing as the amount of supercharging increases
C . approximately equal to exhaust manifold pressure at all times
D . approximately equal to atmospheric pressure at all time
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Overspeed of the diesel engine driving an electric generator could cause().
A . low voltage trip
B . reverse power trip
C . damage to windings
D . excessive exhaust temperature
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If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an ()
A . cavitation erosion in the water jackets
B . excess corrosion inhibitor in the coolant
C . dirty jacket water cooler
D . defective turbocharger
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The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the () cycle.
A . two-stroke
B . four-stoke
C . long-stroke
D . short-stroke
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An electrically driven automatically operating auxiliary blower is provided for slow speed and () of a low speed diesel engine.
A . manoeuvring operations
B . bad combustion
C . cooling
D . mooring trial