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The process of scavenging a two-stroke cycle diesel engine serves to _______________.
Why will a turbocharged diesel engine produce black smoke if excessive additional load is applied too quickly?
Which of the listed types of superchargers will NOT have a volumetric capacity proportional to engine speed?
The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called ___________...
The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually _______________.
According to the illustrated main engine cooling water systems drawing, which of the labeled heat exchangers represents ...
Aftercooling of a turbocharged diesel engine will result in _______________.
Forcing the exhaust gases from the cylinder of an operating two-cycle diesel engine with the aid of a blower is known a...
When a slow-speed diesel engine is used to directly drive a fixed-pitch propeller, how is a stop order met?
With a direct drive main propulsion arrangement, what statement is true?
What statement is true concerning the charge air system of a modern turbocharged slow- speed two-stroke cycle diesel eng...
The device shown in the illustration is commonly used to_______________. MO-0080
How is the illustrated strainer element cleaned during engine operation? Illustration MO-0057
A dirty lube oil strainer can result in _______________.
A dirty diesel engine oil filter element can best be detected by _______________.
Scale and dirt accumulation in the waterside of a lube oil cooler will be indicated by a gradual increase in the lube o...
In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of...
The tube sheets installed in a fire-tube auxiliary boiler are normally connected by _______________.
Which of the following statements concerning fire-tube boilers is correct?
Fusible plugs are installed in fire-tube boilers to _______________.
As it applies to the combustion process associated with diesel engines, what is meant by the term "scavenging"?
If a slow-speed two-stroke cycle diesel engine is fitted with exhaust valves located in the cylinder heads, what scaveng...
If a slow-speed two-stroke cycle diesel engine is fitted with scavenging air ports and exhaust ports located on opposite...
The power consumed during the scavenging process of a diesel engine is known as the _______________.
During the valve overlap period, the exhaust pressure of a turbocharged, four-stroke cycle diesel engine must be less t...
Where is the air charge for an air starting system stored?
An accumulator used in a hydraulic starting system is generally located between the _______________.
Which of the routine maintenance procedures listed is required for starting air receivers?
A two-stroke cycle diesel engine requires less starting air than a four-stroke cycle diesel engine, of equal displaceme...
If the raw water supply pressure for a diesel engine cooling system is below normal, you should check for a ____________...
In a closed cooling water system, which of the following problems can cause the water pressure to fluctuate?
Antifreeze solutions containing ethylene glycol, should not be mixed with corrosion protection oils, as the resultant m...
If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be _______...
In an operating diesel engine, pre-ignition can be caused by _______________.
Irregular engine speed in a diesel-generator can be caused by _______________.
If fuel oil were being discharged from the waste water outlet of a fuel oil disk type centrifuge, operated as a separato...
Heat damage to fuel injection nozzles can be prevented by avoiding _______________.
A modern centrifuge, similar to the device shown in the illustration, is opened for periodic cleaning. The most common c...
One cause of diesel engine surging can be a result of _______________.
The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust _______________.
An exhaust gas bypass is installed on a waste heat boiler in order to _______________.
Casing drains may be required on a waste heat boiler gas passage to _______________.
The purpose of try-cocks used on an auxiliary boiler is to _______________.
In a coil-type forced circulation auxiliary water-tube boiler _______________.
Bottom blow valves are installed on auxiliary water-tube boilers to _______________.
A large, low-speed, main propulsion diesel engine uses sea water to directly cool the _______________.
Cooling the intake air supplied to a diesel engine will _______________.
What is the function of the intake system for a diesel engine?
An increase in the air inlet manifold pressure of a diesel engine will result in a/an _______________.
In a naturally aspirated diesel engine, the volume of air intake is directly associated with engine _______________.
Air motors used for starting some auxiliary diesel engines are generally the type known as _______________.
When an engine fitted with a hydraulic starting system starts up, the starter is protected from the higher speed of the...
Hydraulic starters are installed on many lifeboat diesel engines instead of comparable air start systems, because _____...
Auxiliary diesel engine electric starting motors use _______________.
The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an ____...
The purpose of the engine-driven hydraulic pump in an auxiliary diesel engine hydraulic starting system is to _________...
In a medium-speed marine propulsion engine equipped with direct admission air starting valves, the cylinders without ai...
Starting systems for large, direct reversing, main propulsion diesel engines are usually _______________.
During the starting of a diesel engine, compression gases are prevented from backing into the air starting system, sho...
When an air started, four-stroke cycle diesel engine is being cranked over, the starting air is admitted to each cylind...
When an additional load is applied to a diesel engine which is using an inadequately inflated air bladder clutch unit, ...
Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or_______________.
One of the most common causes of reduction gear failure is gear wear caused by scoring as a result of _______________.
Which of the following is an example of a solid bearing?
Connecting rods in a diesel engine are used to connect the _______________.
The diesel engine wrist pin in the illustration is indicated by the component labeled_______________. Illustration MO-0...
The linear motion of a diesel engine piston is converted into the rotary motion required to drive gears, propeller shaf...
The proper location for journal bearing oil grooves is _______________.
A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of t...
The temperature at which an adjustable bellows type thermostatic valve operates is determined by _______________.
In a diesel engine closed fresh water cooling system employing a radiator, proper water temperature can be obtained by_...
What would be considered a normal temperature increase between the inlet and outlet jacket cooling water of a medium or ...
An electric heater built into some smaller diesel engines is used to _______________.
According to the illustrated diesel engine cooling water systems diagram, what fluid is the low temperature central fres...
According to the illustrated diesel engine cooling water systems diagram, what is the functional description of the low ...
Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?...
The purpose of an oil mist detector in a main propulsion diesel engine is to warn of _______________.
The possibility of a diesel engine crankcase explosion will be increased by operating an engine _______________.
If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase _______________.
Ethylene glycol, when used as a coolant in a closed cooling system for a diesel engine, is more advantageous than untre...
According to the illustrated main engine cooling water systems diagram, which of the following heat exchangers would be ...
According to the illustrated main engine cooling water systems diagram, which of the following labeled heat exchangers r...
According to the illustrated main engine cooling water systems drawing, which labeled heat exchangers use sea water as a...
According to the illustrated main engine cooling water systems drawing, which labeled pump is the main engine sea water ...
Corrosion inhibitors and/or soluble oils are added to diesel engine cooling systems to _______________.
According to the illustrated main engine cooling water systems drawing, which labeled sea water-cooled heat exchanger wo...
What type of propeller thrust reversing method (or methods) is or are used with a main propulsion slow-speed crosshead t...
Diesel engines powering large vessels that drive fixed-pitch propellers through a non- reversing reduction gear are of w...
Which of the following statements is true concerning a main diesel engine oil cooler?
The lube oil cooler is located after the lube oil filter in order for _______________.
What is the function of the main thrust bearing?
Which of the statements represents a characteristic of the thrust collar in a Kingsbury thrust bearing?
The component shown in the illustration, labeled "I", is the_______________. Illustration MO-0013
In addition to achieving a speed reduction for efficient propeller operation, what statement represents other possible f...
Reduction gear casings are vented in order to _______________.
The purpose of the main diesel engine reduction gears is to_______________.
What type of reduction gear would most commonly be used with twin medium-speed propulsion diesel engines driving a singl...
What would be the most accurate description of the illustrated cutaway drawing of a reduction gear as used for medium-sp...
Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears?
In what location is heavy fuel oil kept above the flash point, but below the boiling point of water?
In what location is heavy fuel oil kept below the flash point?
In an HFO service system, what is the immediate destination of the fuel unconsumed by the main propulsion diesel engine?...
What is the function of the aftercoolers installed in the diesel engine air intake system?
Which of the following conditions is most likely to occur if the electric starter motor pinion gear fails to disengage f...
When starting air is admitted, a diesel engine turns over very slowly without firing. The cause may be_______________.
Which of the following problems can occur if you continually fail to drain off condensate from a starting air receiver? ...
Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by _____...
A dry-type exhaust silencer clogged with soot, will cause _______________.
In a diesel engine, a leaking exhaust valve can cause _______________.
The solenoid valves in the fuel oil supply line to an automatically fired auxiliary boiler, are automatically closed by...
Control of the fuel oil metering valve in an automatically fired auxiliary boiler is accomplished by a_______________.
A variable capacity, pressure atomizing, fuel oil burner functions to _______________.
Diesel engine electric starting motors generally require heavier duty motors and operate at higher voltages than compara...
When attempting to restart a warm high-speed engine, which of the following reactions can you expect?
A normally operating diesel engine is shutdown by _______________.
Before starting a diesel engine, you should always _______________.
Before starting a diesel engine that has an engine driven lube oil pump, you should _______________.
Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?...
By what means are two sections of propulsion line shafting typically joined together?
What statement is true concerning oil-lubricated stern tube bearings?
What is the primary purpose of self-aligning spherically-seated line shaft bearings?
Which of the following methods is used to securely fasten the babbitt lining of a reduction gear bearing to its shell? ...
In addition to checking the lube oil sump level and temperature of a line shaft steady bearing, what else must be checke...
Babbitt is a metal alloy commonly used for lining _______________.
When checking a water-lubricated stern tube bearing while underway, what should be checked for?
The pressuretrol which is installed on an auxiliary boiler senses steam pressure changes and _______________.
The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent ___...
Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on an auxiliary...
The most important factor in engine performance is the actual power output at the end of the crankshaft available for d...
Which of the following relationships exist between the temperature developed in a combustion space, and the compression ...
The highest pressure in a diesel engine cylinder normally occurs _______________.
Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of ...
In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to______...
Diesel engines are classified as reciprocating internal combustion engines because they_______________.
Which of the terms listed below represents the operational speed at which excessive engine vibration is created?
Which of the following conditions is indicated by the presence of water in the scavenging air receiver?
The power output of a turbocharged diesel engine will drop if the cooling water flow through the aftercooler is interru...
An operating diesel engine that suddenly loses power, is due to a/an_______________.
A sudden power loss from a turbocharged and aftercooled diesel engine is an indication of a/an _______________.
Maintaining the lowest possible scavenging air temperature at all times is not recommended due to the possibility of th...
The highest pressure in any closed diesel engine fresh water cooling system is at the _______________.
According to the illustrated diesel propulsion plant fresh water cooling systems diagram, in which subsystem is the deae...
According to the illustrated main and auxiliary diesel engine cooling water systems diagram, which of the following heat...
Cooling water pumps driven by direct reversing diesel engines are usually _______________.
A closed fresh water cooling system is commonly used with marine diesel engines because the _______________.
The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and ...
Fuel injection pumps using the port and helix metering principle requires the use of a _______________.
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by _______________.
A naturally aspirated diesel engine at full throttle will have an intake manifold pressure _______________.
A magnetic strainer is primarily used in diesel engine reduction gear oil systems to remove small particles of ________...
The lube oil strainer shown in the illustration is used on the reduction gear of a mid- size diesel engine. The strain...
Where would a coarse screen wire mesh strainer normally be found on a diesel engine lubrication system?
Lube oil cannot be efficiently filtered if it’s_______________.
What would be the primary indication that a heavy fuel oil purifier supply pump suction strainer needed cleaning?
What would be the primary indication that a fuel oil service system booster pump duplex suction strainer needed to be sh...
To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of _______________.
According to the illustrated diesel engine fuel treatment and fuel service systems schematic, what is the purpose of the...
For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because _______________.
Valve '1', as shown in the illustration, should be operated when_______________. Illustration MO-0077
One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the ______________...
The exhaust system for a turbocharged diesel engine functions to _______________.
In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in ______________...
The most common instrument used to measure diesel engine exhaust pressure is the _______________.
Exhaust pipes for separate main propulsion diesel engines can be combined only when _______________.
Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?
When monitoring a heavy fuel oil treatment plant, what would be an indication that the treatment plant throughput volume...
According to the illustrated diesel engine fuel treatment and fuel service systems schematic, what would be the appropri...
Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is a...
According to the illustrated diesel engine fuel treatment and fuel service systems schematic, what statement is true con...
Which of the following methods is normally used to lubricate bearings in a small high- speed diesel engine?
Lube oil pumps taking suction from the sump of most small marine engines are usually _______________.
The main advantage of unit injectors over other fuel injection systems is _______________.
The illustrated device is operated directly by_______________. Illustration MO-0041
Movement of the pump control rack in a fuel injection system using individual plunger-type pumps _______________.
Injection pressure in a common rail fuel system is controlled by_______________.
Fuel oil discharged into the diesel engine cylinder is atomized at the _______________.
In a diesel engine jacket water cooler, with sea water cooling the engine jacket cooling water, what statement is true? ...
In a diesel engine lube oil cooler, with sea water cooling the lubricating oil, what statement is true?
Sacrificial zinc anodes are used on the salt water side of diesel engine heat exchangers to _______________.
In a diesel engine jacket water cooler, with sea water cooling the fresh water, the _______________.
Which of the devices listed is commonly used to compensate for the expansion and minor misalignments occurring between t...
What type of clutch is used in the illustrated medium-speed diesel engine reduction gear? Illustration MO-0085
The pinion gear shown in the illustration, is located . Illustration MO-0086
What type of clutch is pictured in the illustration? Illustration MO-0089
One advantage of electromagnetic slip couplings is _______________.
If oil discharges are detected when the scavenging air receiver drains are blown on a slow-speed, two-stroke, turbocharg...
Upon conducting a machinery space round on a main propulsion diesel, you detect a significant amount of water discharge ...
Upon conducting a machinery space round on a slow-speed main propulsion diesel, you detect a significant amount of oil d...
You are asked by the watch or duty engineer to check for any evidence for turbocharger surging. What should you check fo...