3AE01 - Third Assistant Engineer

The theoretical minimum compression ratio necessary to ensure compression ignition in a direct injection diesel engine ...

Compared to a naturally aspirated diesel engine, a supercharged diesel engine has __________.

Which of the following drawbacks of a gas turbine engine provides the greatest potential for injury to personnel?

The wooden shoring shown in the illustration is bearing against the hatch coaming and is supporting a load in the direc...

Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion cycle which is __________.

In a naturally aspirated diesel engine, the volume of air intake is directly associated with engine __________.

An open cycle gas turbine engine is best described by which of the following statements?

After measuring the length to which a section of shoring should be cut, you should cut the shoring __________.

The intake ports of a two-stroke cycle diesel engine are opened and closed by the action of the __________.

A naturally aspirated diesel engine at full throttle will have an intake manifold pressure __________.

Why is a gas turbine considered to operate on the Brayton cycle?

In a compartment that has been completely flooded with water, the greatest pressure will be exerted __________.

The start of fuel oil injection into the cylinder of a four-stroke cycle diesel engine occurs during the __________.

Excessive wear at part No.11, shown in the illustration would result in __________. Illustration MO-0027

Why is the cycle efficiency higher in the intercooled-recuperated cycle as compared to a simple cycle gas turbine? Illu...

The wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from __________.

An eight cylinder, four-stroke cycle, single acting diesel engine has a 650 mm bore and a 1400 mm stroke. What will be ...

In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in __________.

The acronym CDP stands for which of the following?

Which of the components listed are interchangeable between different backpack self-contained breathing apparatus produc...

Which of the following conditions would NOT be considered a valid reason for the diesel engine to operate in the area i...

Which of the listed characteristics is common to both wet and dry type diesel engine exhaust muffler systems?

What is the term given to a process that occurs without a loss or gain of heat?

Which of the following conditions represents a particular advantage of using a positive pressure type self- contained br...

The indicator card shown in the illustration is produced with a/an __________. Illustration MO-0108

Wet-type exhaust silencers, that are used with some lifeboat diesel engines, utilize which design feature?

A compressor is operating at an inlet pressure of 14.7 (atmospheric pressure at the time of measurement) and a compress...

In accordance with 46 CFR, life jackets should be stowed in __________.

On the cylinder indicator diagram illustrated, the dotted line indicated as "L" is describing the _________. Illustrati...

A water jacket is placed around the exhaust manifolds of propulsion diesel engines to __________.

Which of the following statements concerning fluid flow is true?

The external flotation bladder on an immersion suit should be inflated __________.

The greatest turbulence in a diesel engine cylinder is created by the __________.

In a diesel engine jacket water cooler, with sea water cooling the fresh water, the __________.

The divergent area of the exhaust duct aids in what process?

The hand brake of a lifeboat winch is __________.

Fuel combustion in a diesel engine cylinder should begin just before the piston reaches top dead center and should ____...

In a diesel engine closed freshwater cooling system employing a radiator, proper water temperature can be obtained by _...

The two basic types of compressors used in gas turbine engines are which of the following?

When lowering lifeboats as the vessel is pitching in heavy seas, a good practice is to rig frapping lines __________.

Bearing "crush" as applied to diesel engine main bearings, will result in __________.

Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce __________.

While air is being compressed in a centrifugal flow gas turbine, what happens to the direction of air flow?

To activate an air regeneration canister on a survival craft, you __________.

The diesel engine connecting rods shown in the illustration are distinctively named __________. Illustration MO-0226

In the engine shown in the illustration, the part labeled "W" is cooled by __________. Illustration MO-0003

What is the disadvantage of a dual-entry centrifugal compressor compared to a single-entry centrifugal compressor?

Who is responsible for lowering the survival craft?

In the diesel engine shown in the illustration, the space below the cylinder liner lower seals is subjected to ________...

What is the function of the item "7" shown in the illustration? Illustration MO-0111

Before combustion can occur, the combustion air must be delivered to the combustor at a high-pressure and low-velocity....

The canopy of your life raft should __________.

Barrel face, taper face, grooved, and chrome plated are all types of diesel engine __________.

Antifreeze solutions containing ethylene glycol should not be mixed with corrosion protection oils, as the resultant mi...

An axial compressor stage is represented by which of the following components and in which order?

When personnel are lifted by a helicopter from an inflatable life raft, the personnel on the raft should __________.

The piston pin shown in the illustration should be classified as __________. Illustration MO-0011

Ethylene glycol, when used as a coolant in a closed cooling system for a diesel engine, is more advantageous than untre...

Two functions of the compressor stator vanes include which of the following?

Which of the following conditions represents the appropriate time for setting off distress flares and rockets?

The arrangement and shape of the cams on a diesel engine camshaft directly control which of the listed groups of operat...

Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to __________.

Which of the following terms refers to axial compressor stator blades?

Except in rare cases, it is impossible to extinguish a shipboard fire by __________.

What is the function of a diesel engine's stationary parts?

What may cause a diesel engine cylinder head to crack?

Which of the following statements is true concerning axial compressor disk-type rotors?

Hazardous conditions exist which may result in spontaneous combustion when __________.

Multiple concentric valve springs are often used with diesel engine valves to __________.

Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinder. If the cooling water ...

What is the primary function of an axial compressor rotor blade?

Which of the gases listed is the poisonous gas most likely to be found in a closed compartment involved in a fire?

Item labeled "R" as shown in Fig. 5 of the illustration is identified as the __________. Illustration MO-0025

The process of scavenging a two-stroke cycle diesel engine serves to __________.

The three most common types of combustors used in gas turbine engines are which of the following?

The air flow depicted in figure 1 of the illustration is an example of which type of ventilation? Illustration SF- 0013

In the large slow-speed main propulsion diesel engine shown in the illustration, the part labeled "G" is the __________...

The average exhaust temperature of a two-stroke cycle diesel engine with a turbine-driven supercharger is lower than a ...

A centrifugal flow gas turbine uses what type of combustion chamber?

The class of fire on which a blanketing effect is essential to extinguish the fire is __________.

Which of the following represents the diesel engine camshaft shown in the illustration and its relative rotating speed?...

Regarding the turbocharger shown in the illustration, the part labeled "B" would be attached to the __________. Illustr...

The turbine nozzles convert heat and pressure energy to velocity energy by means of which of the following?

A fire that has developed in a pile of rubber gasket material would be classified as a __________.

Which letter represents the top deck (valve) cover of the engine shown in the illustration? Illustration MO-0122

Which of the turbocharging methods listed directs the exhaust gases to the turbine at fairly uniform velocity and press...

How do the high-velocity high-temperature gases cause the gas turbine rotor to rotate?

A burning mattress is considered as which of the following classes of fire?

A diesel engine crankcase ventilation system __________.

Which of the designs listed will keep the lobes from making contact in a Roots-type blower?

The turbine nozzle blades convert the combustion gases heat and pressure energy into what form of energy?

A fire in a pile of dunnage would be classified as a __________.

The thrust bearing shown in the illustration has over eight years of ahead running time. Measurements show "i1" is 4 mm...

Air scavenging of the cylinder shown in the illustration begins between figures __________. Illustration MO- 0025

The turbine nozzles function to direct the gases in what direction?

The most likely location for a liquid cargo fire to occur on a tanker would be __________.

After a long period of operation, a wear ridge, caused by piston ring action, will develop near the top of the cylinder...

While underway on a slow-speed propulsion diesel, the duty engineer is alerted to a high scavenging air temperature at ...

To keep the exit pressures relatively constant across a HP turbine blade, which type of construction is generally utili...

When required to work in an area where explosive gases may accumulate, you should use hand tools which are __________.

If the relief valve on a diesel engine cylinder lifts, the cause could be due to __________.

The power output of a turbo-charged diesel engine will drop if the cooling water flow through the after cooler is inter...

HP turbine blades are generally cooled by which of the following methods?

The component shown in the illustration would be installed in which of the following types of fire detection systems? I...

The vessel to which you are assigned is fitted with auxiliary engines as shown in the illustration. What statement is t...

Clutching takes place nearest the bearing shown in the illustration, located at number _____. Illustration MO- 0086

Which of the following is a feature of a power turbine blade that is not found on a high temperature turbine blade?

The advantage of using a dry chemical fire extinguishing agent is __________.

The vessel to which you are assigned is fitted with generator drive engines of the type shown in the illustration. In t...

Which of the types of reduction gearing listed is best suited for medium-speed main propulsion units?

Aboard ship, single-shaft gas turbines are used mostly as prime movers for which of the following applications?

When compared to other fire extinguishing agents, water fog __________.

Prior to starting an auxiliary diesel engine on your vessel, the crankcase oil level must be checked. At what checked l...

How is lubrication provided to the device shown in the illustration? Illustration MO-0120

What type of air seal is used in the combustor and turbine midframe of a gas turbine?

A hand portable CO2 fire extinguisher is effective on burning oil only __________.

Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________.

What is the normal bearing clearance permitted at the horizontal axis of the shaft for the bearing shown in the illustr...

What is the purpose of the spring in a lip-type oil seal?

Annual servicing of a hand portable CO2 fire extinguisher includes __________.

The diesel generator set drive engines on your vessel are protected with heavy-duty oil bath air cleaners. The oil with...

The gear drive, shown in the illustration, can have the backlash determined best by using a __________. Illustration MO...

What type of engine starter motor is commonly found on the marine gas turbine shown in the illustration? Illustration G...

Fire hoses located at protected fire stations must always be __________.

The turbocharged, four-stroke, diesel generator set drive engines on your vessel are protected with dry-type air intake...

The pneumatic propulsion control system used on your vessel uses a diaphragm-operated relay valve as shown in the illus...

Accelerating the compressor to the self-sustaining speed of the engine is the function of which of the following compon...

A high velocity fog nozzle will produce the most effective spray pattern when the water pressure is not less than _____...

White smoke issuing from the exhaust of an auxiliary diesel engine could mean __________.

The vessel to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illus...

What is the power source for the ignition exciter of a gas turbine engine?

If deck cargo is carried, it should be stowed so that it __________.

Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions will be made easier b...

The function of the synchronizing motor on the generator governor illustrated is to __________. Illustration MO-0092

The lube oil scavenge pressure on the gas turbine engine shown in the illustration is sensed by which of the following?...

When fighting a shipboard fire, crew members securing doorways, hatches, and applying cooling water to adjacent decks a...

Where is the air charge for an air starting system stored?

As the load is being decreased on the engine controlled by the governor shown in the illustration, the __________. Illu...

For the gas turbine engine lube oil system shown in the illustration, what is the purpose of the lube oil supply check ...

The most effective method of extinguishing a class "A" fire is by __________.

The pilot valves in an air pilot starting system for a two-stroke cycle, direct reversing, main propulsion diesel engin...

Using the oil chart provided in the illustration for guidance, which synthetic oil would be capable of providing adequa...

The main lubrication system utilized by the gas turbine engine shown in the illustration is what type? Illustration GT-...

Which of the listed characteristics applies to a semi-portable CO2 system?

Which internal combustion engine starting system uses a vane type fluid motor?

You are preparing to change the oil of the speed control governor on one of the main propulsion diesel engines on your ...

As shown in the illustration, what is the purpose of pressurizing the main bearing lube oil sumps on a typical marine g...

The most important characteristic of a fire extinguishing agent to be used on electrical fires is for the agent to be _...

Clogged or partially obstructed exhaust ports on a diesel engine can cause __________.

Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at __________.

The fuel oil system of a gas turbine engine provides all EXCEPT which of the following?

If a fire ignites in the engine room as a result of a high-pressure fuel oil leak, you should FIRST __________.

If an auxiliary diesel engine equipped with an electric starting system cranks very slowly after repeated attempts to s...

The hunting of a diesel engine may be caused by which of the following?

What is the approximate percentage of air extracted from the compressor that is mixed with fuel for combustion in a gas...

One of the main concerns when fighting a galley fire is __________.

The TBN value of diesel engine lube oil refers to its ability to __________.

A diesel engine overspeeds and fails to restart when cranked at normal speed. Which of the following problems is the mo...

How do you manually lockout an SSS clutch?

The airborne concentrations of substances (such as hydrogen sulfide) under which nearly all workers may be repeatedly e...

The most crucial time for any bearing with regards to diesel engine lubrication is __________.

The governor utilized with the device shown in the illustration has become inoperative while the vessel is underway at ...

How is the clutch shown in the attached illustration engaged? Illustration GT-0018

Which of the following statements is true regarding oxygen indicators?

Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the e...

With reference to the chart, if a boiler generates saturated steam at 385.3 psig, how much heat per pound was required ...

Assuming at least a 500 rpm for the input shaft speed from the power turbine, as shown in the illustration, the synchro...

Combustible gas indicators incorporate the use of a/an __________.

Which of the following statements is true concerning a main diesel engine oil cooler?

When vapor is in contact with and remains at the same temperature as the boiling liquid from which it was generated, th...

The purpose of the main reduction gear in a marine gas turbine propulsion installation is which of the following?

Which of the following conditions is true concerning flammable liquid vapors with a concentration above the upper explo...

The illustrated device is used to __________. Illustration MO-0050

Assume that steam has formed in a boiler in which all of the steam stop valves are closed, and the water level is held ...

What is the purpose of the Controllable-Pitch Propeller (CPP) hydraulic oil power system?

The vapors given off by heated fuel oil are flammable, explosive, and __________.

The device shown in the illustration is a __________. Illustration MO-0008

The auxiliary steam boiler on your vessel is equipped with a gauge glass for local level indication. On which of the fo...

In a typical gas turbine propulsion plant, the main thrust bearing directly positions which part(s) of the main reducti...

When checking the level of a volatile liquid in a tank on the weather deck of a tank vessel, you should position yourse...

A decrease in the flash point of diesel engine lube oil indicates the lube oil has become __________.

On which of the following auxiliary boiler types would soot blowers be equipped for maintaining heat transfer efficienc...

A magnet pickup typically produces what type of signal output?

An LNG carrier has an approved type of gas detecting system to detect methane leaks. What area(s) would this be NOT use...

Crankcase explosions in propulsion diesel engines can result from which of the following?

The rate of heat transfer in a waste-heat boiler can be increased by __________.

During an auto-start sequence on the marine gas turbine control console shown in the illustration, what would be the co...

High concentrations of hydrogen sulfide gas are most dangerous to personnel because they can __________.

Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine...

Fusible plugs are installed in fire-tube boilers to __________.

Compressor characteristics are normally summarized in the form of which of the following?

If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may n...

Pre-combustion chambers and energy cells in high-speed, small bore diesel engines all serve to increase ________.

Which of the automatic boiler controls listed should be tested prior to lighting off an auxiliary boiler?

Accelerometers are generally used on gas turbine engines to sense which of the following?

If the chemical material is a mixture, what must the Safety Data Sheet (SDS) identify?

Open combustion chambers are designed to __________.

Which of the following actions takes place in the control circuit of an automatically fired auxiliary boiler when the d...

Which of the following instruments is designed to help you when performing an internal inspection of the gas turbine en...

According to 33 CFR Subchapter O (Pollution), an oceangoing ship of over 400 gross tons must be fitted with a standard ...

In terms of the diesel fuels burned in auxiliary and main propulsion diesel engines onboard vessels, which of the liste...

A variable capacity, pressure atomizing, fuel oil burner functions to __________.

The only hand tools that should be used on gas turbine engines are chrome plated, nickel plated, or which of the follow...

As its temperature rises, the volume of fuel oil stored in a tank will __________.

Which of the following statements is true concerning the cetane number of diesel fuel?

Which of the following statements describes how the fuel oil enters the whirling chambers of the sprayer plates used in...

When conducting a borescope inspection, you must be aware of all of the following factors EXCEPT which?

In accordance with 33 CFR Subchapter O (Pollution), which of the following is NOT required to be provided as part of th...

Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is a...

The water-tube natural-circulation steam boiler on your vessel is equipped with soot blowers for maintaining heat trans...

Routine water washing of the gas turbine compressor shown in the illustration, is usually performed while operating und...

When amendments are made to the shipboard oil pollution emergency plan, all revisions must be submitted to the Coast Gu...

What is the purpose of water transducers used with the separator shown in the illustration? Illustration MO- 0127

If the water level as indicated by the gauge glass of an auxiliary boiler is in question, it should be blown down. Whic...

The two main types of compressor stall are known as what?

Which of the precautions listed should be observed when taking on diesel fuel?

The area indicated by the letter "W", shown in the illustration is correctly termed the __________. Illustration MO-011...

On which of the following auxiliary boiler types would soot blowers most likely be fitted?

What is the term given to the condition in which cyclic pressure changes result in a repetitive failure and recovery of...

In accordance with 33 CFR Subchapter O (Pollution), the overall responsibility in maintaining the Oil Record Book is gi...

From the graph shown in the illustration, determine the size of the regulating ring required for the proper operation o...

What would be the most practical and efficient way of removing hard scale deposits from the water-sides of the tubes of...

On a propulsion marine gas turbine, if full power temperatures become excessive, what action should the operator take?

In accordance with 33 CFR Subchapter O (Pollution), the Oil Record Book for all U.S. ships ________.

What is the purpose of the mixing tank shown in the illustration? Illustration MO-0058

On a vessel fitted with a coil-type, forced-circulation, water-tube, oil-fired auxiliary boiler, what is the most pract...

When working with gas turbine synthetic lube oil, which of the following safety measures should always be observed?

The term "load on top" is the name of a method used on many crude oil carriers for the purpose of __________.

The vessel to which you are assigned has a main engine fuel system as shown in the illustration. Besides preventing the...

You are observing the flame condition on an oil-fired auxiliary boiler through an observation window peephole. The flam...

What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine?

Stability is determined principally by the relationship of the center of gravity and the __________.

Air is normally bled from a diesel engine fuel system by __________.

Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?

The gas generator section of the GE LM2500 gas turbine is composed of all of the following components EXCEPT which of t...

The weight of the liquid displaced by a vessel floating in sea water is equal to the __________.

One cause of diesel engine fuel ignition delay is __________.

While preparing an engine for departure, the engineer notices water coming from both the waste heat boiler and turbocha...

Where are the carbon dioxide nozzles located in the GE LM2500 gas turbine enclosure?

What is the definition of the stability symbol “CL”?

Fuel injection systems are designed to primarily meter fuel, atomize fuel, and __________.

As shown in the illustration, if the vessel was operating at full sea speed, the area labeled "L" would be used to ____...

Which of the following components prevent(s) objects smaller than 1/4 inch from entering the GE LM2500 gas turbine?

The distance between the bottom of the hull and the waterline is called __________.

Differential needle valves used in fuel injectors are directly closed by __________.

Casing drains may be required on a waste heat boiler gas passage side to __________.

Which of the following statements is true concerning the fuel oil ignition system of the gas turbine engine shown in th...

The important stability parameter "KG" is defined as the __________.

Regarding the fuel injector shown in the illustration, the purpose of piece #38 is to __________. Illustration MO-0059

The correct procedure for giving an auxiliary boiler a bottom blow, is to begin __________.

What is the primary function of the main fuel control on the GE LM2500 gas turbine engine?

The water in which a vessel floats provides vertical upward support. The point through which this support is assumed to...

Which of the following statements represents the function of the plunger flange labeled "A" shown in the illustration? ...

The most common cause of scale formation in an auxiliary boiler is __________.

For the GE LM2500 gas turbine engine shown in the illustration, the 13th stage bleed air is used for which of the follo...

In the absence of external forces, adding weight to one side of a floating vessel, will cause the vessel to __________.

The component shown in the illustration would be identified as a/an __________. Illustration MO-0097

When rolling over a main engine on your vessel prior to starting with the cylinder test valves open to expel any fluids...

For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 1st stage nozzle vanes are cooled by whi...

Excessive free surface occurring in tanks carrying liquid cargo should be avoided in order to __________.

When a nozzle tester is used to check the spray pattern of a diesel fuel injection nozzle, which of the following state...

Which of the listed conditions could result in the failure of an auxiliary diesel engine to stop running when a normal ...

According to the gas turbine engine illustration shown, the areas labeled "14 thru 29" are locations for _______. Illus...

A vessel having a concentration of weight toward the top of the vessel is said to be __________.

Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires __________.

The vessel to which you are assigned is gear-driven with one main propulsion diesel engine and a fixed-pitch propeller....

The auxiliary steam boiler on your vessel is equipped with a gauge glass for local level indication. On which of the fo...

The horizontal fore and aft movement of a vessel is called __________.

Surface irregularities, such as erosion and pitting on injection pump plungers, will __________.

A main diesel engine on your vessel has experienced a safety shutdown due to excessive crankcase pressure. What is the ...

The rate of heat transfer in a waste-heat boiler can be increased by __________.

The Exclusive Economic Zone extends from the baseline of territorial sea of the United States seaward ___________.

Under what condition would valves "4" and "5", as shown in the illustration, be closed? Illustration MO-0077

An auxiliary diesel engine on your vessel has experienced a safety shutdown due to high lubricating oil temperature. Wha...

As shown in the illustration, if the vessel was operating at full sea speed, the area labeled "L" would be used to ____...

The term "oil", as used in the Pollution Prevention Regulations 33 CFR Subchapter O, means __________.

According to regulations, what is the minimum nominal pipe size for a fuel oil service tank vent line?

Which of the listed items should be secured before performing any maintenance on a solenoid operated air start valve?

Control of the fuel oil metering valve in an automatically fired auxiliary boiler is accomplished by a __________.

In accordance with 33 CFR Subchapter O (Pollution), the definition of graywater includes drainage from which of the foll...