DDE04 - Designated Duty Engineer - 1000-4000 HP

What statement concerning fuel cetane rating and the ignition delay period is true as it applies to towboat main propul...

Which of the following statements is correct concerning heat transfer?

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 __________.

As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital con...

What statement is true concerning diesel engines, such as those used for main propulsion and auxiliary power on tugboat...

Steam tables can be used to obtain the __________.

The acronym CDP stands for which of the following?

A flat block placed under the end of a shore for the purpose of distributing pressure is referred to as a __________.

Which of the listed valve types is typically used for the low-pressure stage of a reciprocating air compressor?

You are assigned to a tractor tug fitted with main propulsion diesel engines of the type shown in the illustration. How...

By which of the listed methods may heat be transferred from one body to another?

Which of the following is the definition of absolute temperature?

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

Which of the following statements represents the proper procedural sequence for adjusting the metering rate of an in-li...

You are serving as a designated duty engineer onboard a harbor tug equipped with main propulsion diesel engines of the ...

The flash point of a residual fuel oil should be used to determine the highest temperature to which the oil may be heat...

Thermal energy is the only form of energy that can be added to or removed from a substance. How is thermal energy that ...

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

Which of the following illustrations represents the proper method of circuit grounding for a low level analog signal ca...

Suppose the diesel generator set drive engines are of the type shown in the illustration on your towing vessel. Assumin...

The property of a fuel oil which is a measurement of its available energy, is known as its __________.

The term "divergent" is best described as which of the following?

Which of the devices listed would be safe to use in a compartment with insufficient oxygen?

Hot water heaters used in potable water systems may have multiple heat sources, such as an electric heating element and...

The ship-docking tug to which you are assigned is fitted with main propulsion diesel engines of the type shown in the i...

In terms of the completeness of combustion, in viewing the flame through the peephole, what would be the indication of ...

Newton's Second Law of Motion states which of the following?

You are involved in an emergency landing of a helicopter on the water. You should inflate your life jacket __________.

What statement is true concerning the term "isochronous" as it applies to prime mover speed control governors?

The river push boat to which you are assigned has a main propulsion engine of the type shown in the illustration. In te...

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

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

Which of the following statements is true concerning an immersion suit and its use?

In a forced-feed lubrication system, what statement is true concerning lube oil reservoir/sump residence time?

When checking the cylinder jacket water cooling expansion tank level on a main propulsion diesel engine on your towing ...

The solenoid valves in the fuel oil supply line to a boiler are automatically closed by __________.

A pressure stage of an axial-type compressor consists of which of the following?

When collecting condensation for drinking water, __________.

Which of the following statements is true regarding mechanical seals?

Before shutting down the main propulsion engines on a tractor tug, ideally what should be accomplished FIRST?

When operating with the auxiliary feed line, feed water flow is controlled __________.

Which of the following is the main advantage of a split-axial compressor case?

If a life raft should capsize, __________.

Referring to the illustration, note that the solenoid in line "C" is closed. The check valve in line "E" is open. The s...

The ship-docking tug to which you are assigned is fitted with auxiliary diesel engines of the type shown in the illustr...

Under normal conditions, the rate of heat transfer in a feed water heater is most greatly affected by the __________.

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

The hand brake of a lifeboat winch is __________.

Referring to the illustrated motorship freshwater cooling system drawing, what statement is true concerning the evapora...

The river push boat to which you are assigned is fitted with generator engines as partly shown in the illustration. Wha...

Design characteristics of a velocity-compounded impulse turbine include the utilization of __________.

An axial compressor stator vane that is mechanically adjusted to provide optimum compressor performance over a wide ope...

When using foam, a "Class B" fire is extinguished by __________.

What is the pressure and condition of the refrigerant entering the receiver of a refrigeration system?

Prior to starting a diesel generator engine fitted on your river push boat, the crankcase oil level must be checked. At...

Nozzle diaphragms are installed in pressure-compounded impulse turbines to __________.

What are the two common forms of axial compressor rotor blade roots?

Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?

In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants decompose and form what chemica...

When starting a towing winch drive engine in preparation for towing operations, what parameter must be checked FIRST up...

A turbine assembly in which steam flows in series through a high-pressure turbine and then on to a low- pressure turbine...

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

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

For a typical transverse-framed deep-draft commercial vessel, what is the normal arrangement for the support of decks?

The various auxiliary diesel engines fitted on your harbor tug may employ a variety of different cranking methods for e...

Why would superheated steam be used in a propulsion turbine instead of saturated steam?

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

Recharging a previously used cartridge-operated dry chemical fire extinguisher is accomplished by __________.

In general, the thermal bulb for a thermal expansion valve used in a reciprocating air conditioning system is usually c...

The various auxiliary diesel engines fitted on your sea-going tug may employ a variety of different starting systems. W...

As steam accomplishes work in an engine or turbine, the pressure of the steam is reduced because it __________.

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

A low velocity fog applicator is retained in an all-purpose nozzle by a bayonet joint. The applicator is prevented from...

To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature an...

The main propulsion engines onboard your tractor tug use a lubricating oil system as shown in the illustration. What it...

The correct radial clearances between the rotor and the casing in a propulsion turbine are maintained by the turbine __...

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

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

In the illustrated refrigeration system, what is the proper name for the component labeled "A"? Illustration RA- 0012

The deck winch drive engine onboard your salvage tug uses a lubricating oil filtration scheme as shown in the illustrat...

Turbine casing flanges are sometimes provided with a system of joint grooving to __________.

The circle of turbine stationary vanes that convert pressure and thermal energy to velocity energy and direct the combu...

During cargo operations, a deck fire has occurred due to a leaking cargo line. You should FIRST __________.

Which of the following refrigerants is normally classified as a low-pressure refrigerant based on a relatively high boi...

The main propulsion diesel engines used to power the ship-docking tug to which you are assigned are started with vane-t...

When the temperature of the main turbine lubricating oil is lowered, an increase will occur in the __________.

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

What is the purpose of opening the doors and portholes in figure 2 of the illustration? Illustration SF-0013

To prevent motor overload during start-up of a centrifugal refrigeration system, what is true concerning the compressor...

A diesel generator set on your salvage tug has a simplex lube oil strainer of the type shown in the illustration, situa...

Which of the filters listed will deplete the additives in lubricating oil?

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

Which of the following statements represents the correct action to take when three crew members discover a fire?

In a refrigeration system, the bulb for the thermal expansion valve is always located where?

Concerning the diesel fuels used for the auxiliary and main propulsion diesel engines used on board the towing vessel t...

Of the many impurities commonly found in marine lubricating oil, which of the following CANNOT be removed by a centrifu...

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

Which extinguishing agent is the best for use on electrical fires?

What must be done, at a minimum, before a system can legally be opened up for repairs while adhering to the prohibition...

Related to the diesel fuels used in auxiliary and main propulsion diesel engines used on the ship-docking tug to which ...

When monitoring a steam propulsion plant lubricating oil pressures, what pressure is the most critical to check regular...

What is the purpose of the air/oil separator shown in the illustration of the gas turbine lube oil system? Illustration...

The longer an oil fire is permitted to burn, the __________.

Which of the valves listed is normally closed when charging the refrigeration system through the high side?

Which of the following fuel systems is characterized by a complete absence of high-pressure fuel lines?

The splits located in the halves of main reduction gear bearings are aligned at an angle to the horizontal in order to ...

Which of the following components removes the oil from the transfer gearbox?

The explosive range of methane is 5% to 15% by volume in air. This means a vapor/air mixture of __________.

Which of the devices listed is used to maintain a snug interface between the rotating and stationary seal members shown...

The main diesel engines on the tug to which you are assigned are fitted with a metal-edge duplex suction fuel strainer,...

Which of the coupling types listed is shown in the illustration? Illustration SE-0001

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

The highest concentration of a harmful substance to which a person may be exposed without danger to health, is termed t...

Which characteristic or condition will have the greatest effect on increasing a hydraulic oil's viscosity?

The harbor tug to which you are assigned has a diesel engine fitted with a rotary plunger distributor type pump. Which ...

A Kingsbury, or pivot shoe type thrust bearing, can bear much greater loads per square inch of working surface than can...

In the ignition system of a gas turbine engine, how is optimum spark achieved?

The reading of a combustible gas indicator indicates the percentage of the __________.

Both the direction of flow and fluid flow rate of a variable displacement radial piston pump are determined by the rela...

The harbor tug to which you are assigned has main engines fitted with open type combustion chambers featuring direct in...

While your vessel is underway at normal speed, a steam drum safety valve develops a significant leak. Your first correc...

A gas turbine engine's main lube oil system pump check valve serves to maintain system prime and perform what other fun...

Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an __________.

The component used in a hydraulic system to store potential energy in the form of hydraulic fluid under pressure, is th...

The river push boat to which you are assigned has diesel generators fitted with intake and exhaust systems as shown in ...

Where do fuel oil vapors tend to accumulate in an engine room?

The electrostatic vent fog precipitator removes oil mist from which of the following areas?

In accordance with 33 CFR Subchapter O (Pollution), each completed page of the Oil Record Book must be signed by the __...

In a series circuit, what is the applied voltage (or sum of the applied voltages) equal to?

The river push boat to which you are assigned has diesel generators fitted with intake and exhaust systems as shown in ...

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

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

In accordance with 46 CFR Subchapter I (Cargo and Miscellaneous Vessels), fire main outlet valves or hydrants located o...

What statement is true concerning the total resistance of a parallel circuit?

The tractor tug to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illus...

The bottom blow valve on a water-tube boiler is usually attached to the __________.

The lube oil system shown in the illustration, is designed to lubricate the main bearings by what principle? Illustrati...

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

When configuring a digital multimeter as an ohmmeter, what will MOST likely be displayed on the screen when the test le...

The harbor tug to which you are assigned has main engines fitted with intake and exhaust systems as shown in the illust...

Which type of energy conversion is associated with an operating steam boiler?

The bleed air surge relief valve differs from a normal relief valve in which of the following ways?

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

When a battery-operated megohmmeter (insulation tester) is used to perform a dielectric absorption test, the resistance...

The diesel engines on your towing vessel are all protected with dry-type air filters. The air filters should be inspect...

The purpose of the boiler drum air cock is to __________.

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

In accordance with 33 CFR Subchapter O (Pollution), a shipboard oil pollution emergency plan is required to be reviewed...

As the electrolyte level in the cells of a lead-acid battery evaporates over time, what will tend to happen to the spec...

The freshwater cooling systems serving the main engines of your towing vessel are of the type shown in the illustration...

The purpose of the separating nozzle in the accumulator of a water-tube, coil-type, steam generator is to separate ____...

What feature is commonly used on articulated reduction gear arrangements for the correction of misalignment between the...

A fire involving trash and paper waste would be classified as a __________.

A split-phase induction squirrel-cage motor will not start and come up to speed, even though the rated voltage and freq...

You are replacing an automotive type cooling water thermostat on one of the diesel generator sets on your ship docking ...

In a coil-type forced circulation water-tube boiler, __________.

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

A class "B" fire develops on the weather deck amidships of a moored tank vessel. The fire party should man the ________...

What can be the cause of excessive heat or burning contacts in an operating motor controller?

Assuming the use of ultra-low sulfur content diesel fuel, what combination of conditions associated with harbor tug eng...

Which of the following statements concerning fire-tube boilers is correct?

A magnet pickup typically produces what type of signal output?

Radiation can cause a fire to spread by __________.

Which of the procedures or conditions listed could result in damaging a transistor beyond repair?

The auxiliary engines on the ocean-going tug to which you are assigned are fitted with Roots-blowers as shown in the il...

A boiler pressuretrol senses steam pressure changes and __________.

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

All of the following are part of the fire triangle EXCEPT __________.

Three 12-volt, lead-acid, batteries connected in series will develop how many volts?

You are assigned to a tractor tug with a drive system as shown in figure "A" of the illustration. What type of propulsi...

A photoelectric cell installed in a boiler burner management system __________.

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

To prevent the spread of fire by convection you should __________.

Which of the illustrated motors has an open, drip-proof (ODP) motor enclosure? Illustration EL-0001

The ship-docking tug to which you are assigned is fitted with main propulsion engines driving through pneumatic airflex...

The purpose of the mica used in a boiler water gauge glass assembly is to prevent __________.

Which of the following conditions permits a gas turbine to produce 100% power?

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

What is the functional purpose of a generic electromagnetic relay?

The two-stroke cycle main propulsion engines on the harbor tug to which you are assigned are fitted with turbochargers ...

A boiler safety valve must be capable of __________.

Borescope inspection of the combustor section requires which type of light source?

A simple precaution to reduce the possibility of accidental fires in the paint locker, is to __________.

Which of the substances listed can be used to shield sensitive equipment from static magnetic fields?

The lubricating oil system supporting the main propulsion reduction gear on the ship-docking tug to which you are assig...

A secondary function of the refractory installed in a marine boiler is to __________.

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

On a cargo ship equipped with a combination fire detection/carbon dioxide extinguishing system, the presence of fire is...

Ships requiring extremely rapid maneuvering response using propeller shaft speed and direction as the sole means of con...

Suppose the generator set drive engines on your ship docking tug are fitted with hydraulic isochronous governors such a...

As the percentage of CO2 in the stack gas decreases, you can assume that __________.

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

Fire detecting systems on merchant vessels may be arranged to sense __________.

In which of the following branch circuits types would time lag fuses (or dual-element fuses) be MOST likely used?

Suppose each of the main propulsion engines on your harbor assist tug is equipped with a variable speed governor equipp...

Which of the following is the best reason for opening the air cock when draining a water-tube boiler?

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

If the cause of severe list or trim of a vessel is due to off-center ballast, counter-flooding into empty tanks will __...

The arc resulting from the tripping of a circuit breaker is prevented from damaging the contacts. How is this done?

The pneumatic propulsion control system used on your towing vessel is configured as shown in the illustration. In terms...

When cleaning the inside surfaces of the boiler tubes of a water-tube boiler with a powered rotary brush, the brush sho...

Compressor surge is caused by which of the following factors?

If additional weight is placed on the main deck of the vessel shown in the illustration __________. Illustration SF-002...

Assuming the vessel has an engine control room, where is an engineers' assistance-needed alarm required to produce an a...

Suppose the main propulsion diesel engines on your river pushboat are fitted with pressure-compensated governors as sho...

To make temporary emergency repairs to brickwork in a boiler furnace, which of the materials listed should be used?

On a vessel equipped with marine propulsion gas turbines, the operator's initial response to a high vibration alarm sho...

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

Which of the valves listed is NOT considered to be a hydraulic system directional control valve?

The steam generating plant on your articulated tug-barge unit is of the forced-circulation type. Which figure of the il...

Which procedure should be followed to dry out the fireside of a boiler after water washing?

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

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

A vessel is in compliance with federal regulations regarding the discharge of sewage by __________.

The heating boiler on your harbor tug is of the type shown in the illustration. Which of the following arrangements des...

The boiler water gauge glasses should be blown down __________.

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

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

The rudder torque capacity of the four-ram steering gear illustrated, is rated at 44,210,000 inch-pounds with one power...

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

Water in the fuel supply to a steaming boiler can be detected by __________.

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

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

For a pneumatic transmission system for instrumentation purposes, if a pneumatic pressure indicator has a calibrated sc...

The auxiliary oil-fired water-tube steam boiler on your ship-docking tug is equipped with a water column similar to tha...

Which color burner flame would indicate too much excess air?

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

When pumping sour crude, which gas should be tested for prior to entering the cargo pumproom to repair a leaking pump?

Which of the following components listed is shown in the illustration? Illustration GS-0041

Diesel engine closed, re-circulating cooling water systems are particularly prone to cavitation corrosion/erosion. Whic...

In a boiler equipped with an automatic feed water regulator, erratic variations in the steam drum water level could be c...

As shown in the illustration of a gas turbine fuel oil system, when the engine fuel oil valves are de-energized, the re...

A tank or compartment is "gas free" when there is an absence of dangerous concentrations of __________.

Which of the following statements is true concerning the gauge labeled "A" of the illustrated gauge manifold set? Illus...

A main propulsion diesel engine on your ship docking tug has experienced a safety shutdown due to high lubricating oil t...

Boiler tube failures can result from __________.

In order to get a ready indication for a normal start with a GE LM2500 gas turbine engine, what permissive(s) must be m...

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

Which of the listed numeric values represents the smallest size drill?

When rolling over a main engine on your river push boat prior to starting with the cylinder test valves open to expel an...

Treatment of boiler feedwater for the control of hardness is necessary to prevent __________.

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

Victual waste is __________.

In accordance with 33 CFR Subchapter O (Pollution), besides retention of ballast water onboard or use of approved onboar...

While proceeding in open waters to a ship requiring docking assistance, one of the main engines on your ship-docking tug...

Testing boiler water for chloride content will indicate the amount of __________.

You are preparing for a borescope inspection of an LM2500 gas turbine engine. You are reviewing the correct geometric or...

If an incorrect entry were made in the Oil Record Book, you should __________.

From the information given in the illustration, what would be the maximum output amperage available from the emergency g...