3AE02 - Third Assistant Engineer (Alt)

When normal operating pressure is applied to the hydraulic oil in a high-pressure system, the oil __________.

The turns ratio of the tapped step-down transformer shown in figure "C" of the illustration is four to one and all taps...

Circulation of water and the steam/water mixture within a natural circulation boiler is retarded by __________.

Chemicals are added to boiler water to __________.

Release of refrigerant to the atmosphere during the process of purging of air and non-condensable gases can be kept to ...

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

Overheating of the generating tubes will occur when a boiler reaches its end point of __________.

8 ounces of oxygen, dissolved in 500,000 pounds of water, is a concentration of __________.

The device shown in the illustration is being used to control the output of an axial piston pump. "T" is the exhaust to...

An open primary coil in a voltage transformer (VT) will be indicated by which of the listed conditions?

The primary operational difference between a huddling chamber type safety valve and a nozzle reaction type safety valve...

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

When checking the oil level on a reciprocating air compressor fitted with a dipstick, under what conditions should the ...

What is the nominal output voltage of a 6-cell lead-acid battery?

A boiler safety valve must be capable of __________.

What boiler water chemistry is necessary to ensure the precipitation of hard scale forming calcium?

What statement is true concerning the operation of continuous-level liquid level detectors?

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

Which of the listed refractory materials is capable of providing structural stability?

The major reason dissolved gases are removed from boiler feedwater is because they may cause __________.

Which of the conditions listed would indicate a large condenser tube leak within the distiller shown in the illustratio...

The torque load that a synchronous motor can handle is dependent on the hold-in strength of the poles. Hence, to increa...

Arrow "B" shown in the illustration indicates the __________. Illustration SG-0008

Carbon dioxide dissolved in boiler water is dangerous in a modern power boiler because the gas __________.

A reciprocating refrigeration compressor may be tested for leaking discharge valves by stopping the compressor, turning...

From the information given in the illustration, which of the following statements is correct? Illustration EL-0106

In most marine boilers, the primary reason the first few rows of generating tubes, called screen or furnace row tubes, ...

Which of the following represents a significant system limitation to be aware of when a burner management system is ope...

What is the name of the structural member that is designed to transfer load from one deck to another?

Regulations require that shipboard cabling use stranded copper conductors. Why is copper a superior conductor compared ...

Which of the following statements represents the primary function of handholes used on a boiler?

When the flame scanner senses flame failure during boiler operation, which of the listed events will occur FIRST?

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

As shown in figure "A" of the illustration, with the switch closed what statement is true if "R1" and "R2" have unequal...

Which of the following locations could desuperheated steam be considered to occur?

As found in a basic pneumatic automatic combustion control system, the function of a standardizing relay is to ________...

Which of the listed components of a hydraulic system would enable the pump to be temporarily shut down, and yet still p...

What is the shape of the schematic symbol for an operational amplifier used in an analog circuit?

Which of the following statements describes the effects that dissolved oxygen has on boiler internal surfaces with chan...

Modern day boiler automation allows bypassing the "flame safeguard" system to permit a burner to have a "trial for igni...

Concerning air conditioning system steam heating coils, what statement is true?

What would be the total current draw of the circuit as shown in figure "A" of the illustration if the source voltage is...

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

Because of the pressure drop existing across each diaphragm, the flow of steam between the nozzle diaphragm and the rot...

A micrometer screw has a pitch of __________.

What statement is true concerning the electrical diagrams for the motor controller shown in the illustration? Illustrat...

Which of the following statements concerning boiler steam drum surface blow piping is correct?

What happens to the steam as it moves across the moving blades in a reaction turbine?

In the illustrated pneumatically operated, diaphragm actuated control valve, what statement is true concerning the open...

Periodic testing using a special sensing device may be performed to detect potentially dangerous loose or corroded bus ...

Where is the "dry pipe" located in a boiler?

Large temperature and pressure drops which occur in the first stage of a combination impulse and reaction turbine are c...

Concerning the charging of refrigerant into a vapor compression refrigerating system, which of the following is true?

What is an ammeter used to measure?

Which of the conditions listed could cause steam formation in the economizer?

Why is superheated steam used in the main propulsion turbines instead of saturated steam?

Under the federal regulations of, if a vessel equipped with a Type III Marine Sanitation Device enters a body of water ...

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

A check valve is located between the economizer and the steam drum to __________.

As steam first enters the main propulsion turbine, which of the following energy conversions takes place?

In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types ...

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

Scavenging air is supplied to steam sootblower elements to __________.

When turbine rotor shafts extend through the casing, an external source of sealing steam is used in conjunction with la...

Concerning a conventional mooring winch, what statement is true?

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

Boiler fuel savings gained by the use of an economizer can amount to __________.

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

Standard filter/driers used in many commercial type refrigeration units may contain what type of substance?

As shown in the illustrated diagnostic setup for locating a shorted field coil of a ten-pole synchronous motor, if 240 ...

In a boiler equipped with a convection type superheater, the superheater tubes are located __________.

The purpose of the sentinel valve installed on a turbine casing is to __________.

If a reciprocating air compressor has cylinder suction or discharge valves that fail to properly seat, what statement i...

The motor of the illustrated motor controller fails to start on an attempted startup. You ensure the motor has not trip...

The boiler superheater shown in the illustration is a/an __________. Illustration SG-0007

Main steam turbine bearings are lined with __________.

A high-pressure centrifugal chiller, currently charged with R-134a, is being evaluated for leak testing. The machine is...

In order to definitively determine whether or not fuse "1", shown in the illustration is blown using an on-line testing...

Many steam plants are designed so that diesel oil can be provided to the burners when __________.

Which of the following statements is true concerning the turbine shown in the illustration? Illustration SE-0016

You press start button on the hydraulic power unit shown in the illustration, and the motor does not start. The first t...

How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?

Why should the fuel oil be recirculated before lighting off a cold boiler?

The main propulsion shaft turning gear usually connects to the free end of the high-speed high-pressure pinion because ...

When securing a sea water-cooled shell-and-tube heat exchanger for an extended period of time, what statement represent...

The nominal voltage of one cell of a wet cell nickel-cadmium battery is approximately how many volts?

When raising steam on a cold boiler under normal conditions, you should always __________.

In securing the main turbines, steam to the second stage air ejectors should be left on for a short period of time in o...

In the illustrated self-contained, internal-pilot, piston-operated temperature control valve, what statement is true co...

How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly ...

When raising steam on a boiler, the superheater drains should __________.

Operating a steam turbine propulsion unit at medium-speed, in an area with extremely cold sea water and the main circul...

When repacking a stuffing box fitted with a lantern ring, which of the following precautions should be observed?

What type of AC motor would use a rheostat in the rotor circuit to vary the speed of the motor?

Which of the actions listed should be carried out immediately after securing the fires in one boiler of a two- boiler sh...

The FIRST step in breaking vacuum on a main turbine unit should be to __________.

When pumping down an air conditioning system to test the low-pressure cut-out switch, assuming that the compressor is r...

What is the function of the movable cams in a master-switch winch motor drum controller?

Before blowing tubes in a boiler equipped with steam sootblowers, you should __________.

To stop the rotor of a main turbine while underway at sea you should __________.

If the superheat setting of a thermostatic expansion valve is set too low, what would be the result, assuming that the ...

Concerning the illustrated motor controller circuit, where is the location of the motor "run" indicator light? Illustra...

When increasing the firing rate of a boiler, which of the following should be carried out FIRST?

The most critical period of main turbine operation is during cold start-up, rather than hot shutdown because __________...

During operating periods of a multi-box refrigeration system using a capacity-controlled compressor, when all of the ev...

As shown in the illustration of an electrically operated watertight door controller, how is the motor stopped automatic...

If there is a sudden drop in the outlet temperature of an uncontrolled superheater, you should __________.

The original bridge gauge reading for a reduction gear bearing was measured as 0.008 inches. A year later, the bridge g...

The illustration is drawn to a scale of 3/8 inch = 1 inch. What is the full-size dimension of "X", if the scale lengths...

Upon failure of the normal power supply, by what means is the emergency generator placed on the line and connected to t...

Which of the following items should be checked each time the firing rate or forced draft pressure is adjusted?

Which of the following statements describes how the main propulsion turbine overspeed relay initiates closing of the th...

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

Which of the following statements about a three-phase wye connected alternator is correct?

You are standing watch in the engine room of a steam vessel. You should blow down a gauge glass periodically to _______...

Which type of packing is primarily utilized to control steam leakage from the casing of a modern auxiliary turbine?

When one belt of a multiple V-belt drive requires replacing, what will be required?

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

The boiler water gauge glasses should be blown down __________.

Packing rings installed on auxiliary turbines are generally lubricated by __________.

Which of the listed types of seals is used effectively for pumps handling toxic or highly flammable liquids that cannot...

Incandescent lamps are classified according to the shape of the bulb and the type of service, as well as the size and s...

Which of the following repairs should be made to a badly warped boiler tube?

How is an auxiliary turbine boiler feed pump normally stopped?

A roller bearing has an interference fit with the shaft upon which it is being installed. What thermal method of mounti...

In the illustration of the one-line distribution system diagram, if at sea the 450 VAC section of the main switchboard ...

Radial cracks have developed in the castable refractory of the burner cones after the first firing since the installati...

In the illustration of a typical ship service turbo-generator control system, the handle labeled "B" is used to _______...

What provision is made for sea chests for removal of ice from within the sea chest of a machinery space sea water cooli...

The multiplier prefix "giga" (G) such as used in "gigabytes" represents what multiplication factor?

When a propulsion boiler is removed from service for an extended period, why should the firesides be thoroughly dried a...

Which of the following is used to hold the poppet valves closed in a turbo-generators nozzle control speed regulator?

The action necessary to use the steering gear room trick wheel when transferring the steering control from the wheelhou...

A silicon-controlled rectifier (SCR) is a solid-state device used for what functional purpose?

Which of the following would indicate a moderate leak in the desuperheater?

According to the illustration, what is the normal function of the component shown? Illustration SE-0010

In a closed-loop process control system, what term is used to describe the action of measuring the difference between t...

Silicon diodes which are designed for a specific reverse breakdown voltage, and are most often used as electronic power...

If the engineer on watch has reason to doubt the accuracy of the water level showing in the boiler gauge glass, he shou...

As lube oil absorbs moisture its dielectric strength can be expected to __________.

Which of the following deballasting operations performed in conjunction with loading cargo could be accomplished withou...

How are operational amplifiers, used primarily in analog circuits, characterized?

While the vessel is rolling in heavy seas, the level in the boiler gauge glass remains steady, this is an indication th...

If contaminated lube oil were allowed to settle undisturbed in a tank, into which layers would the contaminants separat...

What is meant by the term toughness as it applies to a material?

Referring to figure "4" of the illustration, what type of logic gate is symbolized? Illustration EL-0035

Insufficient combustion air supply to the furnace would cause __________.

Magnets are installed in the main propulsion turbine lube oil strainers to attract metal particles released through wea...

Which term represents the change in speed required before a speed control governor will initiate corrective action as t...

Of the following, what shipboard system is MOST likely to use the synchronous transmission system featuring a transmitt...

Which of the conditions listed would indicate excessive soot buildup on the economizer?

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

For marine-type shell-and-tube heat exchangers, what is the most common arrangement for baffles?

What Ethernet cabling technology supports the greatest data transfer speeds?

In the boiler steam and water system, pressure is highest in the __________.

Turbine lube oil suction strainer baskets have __________.

When an electricity generating plant features shaft-driven generators, what type of propulsor would be the most practic...

As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the un...

A pneumatic dual element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes ______...

Which of the following statements concerning the operation of a lube oil purifier is correct?

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

Referring to the impressed current cathodic hull protection system shown in the illustration, if required to control th...

If manual control of the water level in a steaming boiler is required, the proper method of control is with the auxilia...

In order to obtain the best performance with a lube oil purifier, the lube oil inlet temperature should __________.

When securing a flash-type evaporator for an extended period of time, you should __________.

When power is restored after a complete power failure, how will the steering gear pump motor which was on- line respond?

Deaeration of condensate primarily occurs in what section of the illustration shown? Illustration SG-0010

The disk stack and tubular shaft used in a lube oil centrifugal purifier, is forced to rotate at bowl speed by ________...

The sensing line for the low-pressure cut-out switch for a refrigeration system is typically connected at what specific...

Which of the following methods should be used to dress the face of silver-plated contacts?

The two-element feedwater regulator functions similarly to the three-element feedwater regulator, but does not utilize ...

The rotating speed of the tubular bowl centrifuge is more than twice that of the disk-type. The reason for this is ____...

For an analog electronic transmission system for instrumentation and control purposes, what is a common industry standa...

What is a useful instrument for checking 3-phase AC motor performance by measuring possible unbalanced currents?

A triple element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes __________.

In a steam turbine and reduction gear main propulsion plant, the alarm sensor for low turbine oil pressure is usually i...

Which of the following statements is true concerning the illustrated gauge manifold set? Illustration RA-0001

Why must caution be exercised during the charging of flooded lead-acid storage batteries?

While underway on watch in the engine room of a steam vessel, the proper valve positions for controlling feedwater to t...

On a ship equipped with a gravity type lube oil system, which of the conditions listed will occur FIRST if the main lub...

On a bearing using an oiling ring as a means of static oil feed, how often should the bottom of the bearing sump be dra...

If it becomes absolutely necessary to run an alternator at lower than 5% below its rated frequency, in terms of output ...

In a closed feed and water cycle, which of the conditions listed could prevent vacuum from reaching the desired level?

Water retained in the lube oil system of a main propulsion turbine installation is undesirable because it __________.

What is the name of an internal passage of watertight construction fitted along the centerline between the double botto...

Which of the following voltage testers would be associated with high quality, be safe to use, and minimize the electric...

The function of item "E" shown in the illustration is to __________. Illustration GS-0099

A cloudy or milky appearing lube oil sample, taken from the main lubricating oil system could be caused by __________.

If the drive belts on an air compressor were squealing during start-up, you should do which of the following?

In accordance with 46 CFR Subchapter J (Electrical Engineering), which of the following starting aids is the ONLY metho...

The automatic recirculating valve in the main condensate recirculating line is controlled by a temperature sensor which...

Most main propulsion reduction gear bearings are __________.

When securing a steam reciprocating pump, which of the valves listed should remain open?

An electric propulsion drive system in which the propulsion generator supplies power to both the propulsion motor and s...

Air accumulated in the after condenser of the air ejector unit is discharged directly to the __________.

Which of the following methods is used to securely fasten the Babbitt lining of a reduction gear bearing to its shell?

If the speed of a drill is too great, the drill will __________.

How is the main shaft rotation on an AC diesel-electric propulsion vessel normally reversed?

According to the illustrated diagram, what is the correct sequential order of heat exchangers that the main condensate ...

Axial movement in a gear-type flexible coupling is provided for by __________.

How may a suspected tube leak on a shell-and-tube jacket water cooler most easily be located?

Before work may safely commence on a high voltage system, what must first be done after disconnection and isolation?

While maneuvering out of port, you answer a stop bell. You notice a lot of steam coming out of the gland exhaust conden...

Reduction gears for main propulsion turbines are lubricated by __________.

A device used to hold open the refrigeration compressor suction valve during starting to reduce the compression load is...

Some shipboard high voltage systems have the neutral point of the generators bonded to the ship's hull with a neutral g...

Which of the listed systems would be a potential source for the high-pressure drain system?

After the housing has been bolted down, the final check of reduction gear tooth contact is usually made by __________.

For a parallel axis single reduction gear, what statement is true?

In a podded azimuthing propulsion system, how is three-phase, frequency and voltage controlled power delivered to the s...

When heated, fuel oil will __________.

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

If the demister used in the device shown in the illustration is improperly installed, which of the following will occur...

Referring to the sound-powered telephone circuit shown in illustration, what statement is true concerning the button on...

Originally steam ship f/o service and settling tanks were designed with only a high suction and a low suction and no ot...

Which of the following operational practices is helpful in avoiding the accumulation of condensate in the main reductio...

What statement is true concerning the effect of elevating the temperature of the oily-water mixture associated with an ...

What should be included in the routine periodic maintenance checks for electrical motors?

In accordance with 46 CFR Subchapter D (Tank Vessels), what is the minimum flash point of oil to be used as fuel for th...

The slight wavy appearance of the tips of reduction gear teeth is a result of __________.

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

A low voltage, high current testing unit consisting of an autotransformer, ammeter, and timer may be used to test the p...

Which of the following chemicals is used in an Orsat apparatus to absorb carbon dioxide?

Auxiliary steam at full operating pressure is supplied from the boiler directly to the __________.

If a reverse-osmosis freshwater generator has fouled membrane modules, what statement is true?

In terms of the type of load in an alternating circuit, in what type of alternating current circuit will the voltage al...

If the stack temperature is higher than normal, this could indicate __________.

Which of the following conditions is indicated by the necessity of providing excessive gland sealing steam pressure to ...

How would you prevent the rudder from moving while a repair is made on the steering system using the illustrated actuat...

An electrical component is connected across a 120-volt 60 hertz AC supply. What is the current drawn by the component i...

When burning fuel oil in a boiler, a high CO2 content is desired in the stack gas because __________.

A contaminated steam generator is used to produce saturated vapor from collected __________.

With regard to the cooling and heating coils and humidification and regeneration chambers of a liquid cargo- hold dehumi...

As shown in figure "A" of the illustration, what would be the circuit impedance if the capacitive reactance is 10 ohms ...

Fuel oil is transferred to the settling tanks for __________.

The intermediate pressure bleed steam system, shown in the illustration, is used to supply steam at approximately _____...

Referring to the illustrated bellows-type thermostatic steam trap, what statement is true concerning its operation? Ill...

What would be the actual rotor speed for a 4-pole three-phase squirrel-cage induction motor operating at 60 Hz if the r...

Which characteristic of fuel oil is the most significant when determining the temperature to which the fuel oil must be...

If a major flareback occurs to a boiler, which of the following actions should be immediately taken?

If an air compressor is fitted with a hand-off-auto (H-O-A) control station, what statement concerning operation is tru...

While standing an "at sea watch" onboard a ship fitted with electrical propulsion motors, you notice the propulsion tra...

The amount of oil atomized by a straight mechanical fuel oil burner depends on the sprayer plate size and the _________...

Which boiler casualty is considered to be the most serious?

What maintenance may be carried out on a thermostatic expansion valve?

The winch shown in the illustration operates in any of the positions with the master switch in the 'lower' direction, b...

All fuel oil service pumps are equipped with a __________.

If it should become necessary to abandon a compartment because of the danger of a large steam leak on a boiler, which o...

In the illustrated single zone HVAC system, what statement represents the functioning of the diverting relay as it cont...

What is the main purpose of the auxiliary winding on a split-phase, single phase motor?

Fuel oil solenoid valves at the burner fronts should be of the manual reset type to __________.

Which of the precautions listed should be taken when gagging a boiler safety valve?

When arc welding, the flux that covers the electrode is used to __________.

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

All oil-fired main propulsion burners with automatic safety control systems must automatically close the burner valve w...

When the plunger of an injection pump of an auxiliary diesel engine is stuck, it may cause which of the following condi...

As shown in the illustrated flow diagram for a self-contained recovery unit designed for the recovery of refrigerants f...

Which of the listed figures shown in the illustration represents a three-phase transformer connected in a wye- wye confi...

A flame scanner installed in modern boiler combustion control systems, functions to __________.

What is the purpose of a rotocap on an auxiliary diesel engine exhaust valve spindle?

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

In the diagram of the switchboard shown in the illustration, what is the function of the device labeled "Gen. Bkr. Sw."...

Which of the terms listed represents the ratio between the highest and lowest fuel oil pressure at which the burners wi...

At what piston position should you set the valve clearance on a four-stroke auxiliary diesel engine?

What advantage does a 4-pipe hydronic heating/cooling system have over a 2-pipe hydronic heating/cooling system? Illust...

How is the main propeller shaft rotation of a rectified DC diesel-electric drive normally reversed?

Which of the following procedures represents the proper care of unused burners during low load conditions?

When removing a piston, what is a good indication that your lube oil is good and supplied in the proper amount?

What is the primary purpose of the lead-lag arrangement of the two potable water pumps supporting a typical potable wat...

Referring to the illustration pertaining to a steering system hydraulic power unit motor controller, what statement is ...

When a boiler flareback occurs, you should __________.

When you hear an exhaust gas turbine of an auxiliary diesel engine surge it sounds like it is "barking." What is the li...

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

What does figure "C" of the illustration represent? Illustration EL-0092

Insufficient combustion air supply will cause an atomizer flame to appear as a __________.

What color smoke may be indicative of a leaking head gasket?

In terms of ship construction framing methods, what statement is true concerning the longitudinal framing system?

Which of the following statements, concerning the cleaning maintenance of a brushless generator, is correct?

Boiler fuel oil atomizer parts should be cleaned by soaking in 'tip cleaner' or diesel fuel and __________.

If an auxiliary diesel engine is overheating at a steady load, what should be the first thing that you suspect?