OSV – Chief Engineer, Revision & Practice Exams

As first engineer you are the senior engineering officer in Emergency Squad #1. The fire alarm sounds and you report to the muster station where the bridge informs you smoke has been reported coming from the ship's laundry room. What should your first action be?

1. Start boundary cooling the area.
2. Help dress out other crew members in fireman's outfit.
3. Charge the ship's fire main.
4. Secure power and ventilation to the laundry room and inform the bridge once this is done. ✓

According to Coast Guard Regulations (46 CFR 30), a flammable liquid with a Reid vapor pressure of 8-1/2 psi or less, and a flash point of 80°F or below, is a grade __________.

1. A
2. E
3. C ✓
4. D

With regards to a ship's Oil Record Book, an oil tanker of 150 gross tons and above must maintain entries in ________.

1. Part I only
2. Part II only
3. Both Part I and Part II ✓
4. Part III

Which of the illustrated resistors represents the schematic symbol shown in figure "B"? Illustration EL-0021

1. figure "4"
2. figure "6"
3. figure "10" ✓
4. figure "11"

Using the catalog selection chart shown in Illustration EL-0180, determine the correct catalog number for a motor starter that meets the following criteria: NEMA Open enclosure 3-pole Rated at 45 continuous amperes Vertically mounted Electronic overload relay-Ground fault feature set Reversing starter Operating coil rated at 24 VAC/60 Hz

1. AE19GNVB5G045
2. AN19AN0A5E005
3. AN59GNVT5G045 ✓
4. CN16GNVT5G045

In the lighting distribution circuit shown in the illustrated lighting panel L110 of the illustration, if all circuit breakers are closed and due to a problem with the relevant feeder circuit breaker, there is a loss of power on the incoming phase A, which of the following statements is true? Illustration EL-0013

1. All of the receptacles in the laundry would lose power.
2. Half of the accommodation lighting circuits on the 01 deck, port side would lose power. ✓
3. All of the accommodation lighting circuits on the 01 deck, starboard side would lose power.
4. Half of the passageway lighting circuits on the 01 deck would lose power.

When a high voltage system insulation test value is suspect or recorded during an annual survey, a polarization index test is performed. What is the polarization index?

1. The polarization index is the ratio of the insulation resistance taken at thirty minutes to the insulation resistance taken at one minute.
2. The polarization index is the ratio of the insulation resistance taken at ten minutes to the insulation resistance taken at one minute. ✓
3. The polarization index is the ratio of the insulation resistance taken at one minute to the insulation resistance taken at ten minutes.
4. The polarization index is the insulation resistance taken at ten minutes.

For troubleshooting purposes, the key indicator to the safety and general condition of high voltage circuitry is insulation resistance. For a 6.6 kV high voltage system, what would be the recommended minimum insulation resistance value?

1. 1 megohm
2. 5.6 megohms
3. 6.6 megohms
4. 7.6 megohms ✓

According to the liquid crystal data display for the depth sounder shown in the illustration, what is the instantaneous depth currently being displayed? Illustration EL-0186

1. 43.5 meters below the surface
2. 43.5 meters below the transducer
3. 47.5 meters below the surface
4. 47.5 meters below the transducer ✓

While calibrating a 4-20 mA electronic, or a 3-15 psi pneumatic controller, with a process output of 50-250 psi, what is the controller span/range you are dealing with?

1. Output process span is 200 psi. ✓
2. Output process range is 0-250 psi.
3. Controller process output span is 0-250 psi.
4. Controller input ranges are 0-40 mA and 0-15 psi.

Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?

1. Coast Guard
2. Chief Mate
3. Chief Engineer
4. Master of the vessel ✓

A horizontal electro-mechanical anchor windlass is equipped with two warping heads, two wildcats, two manual brake handwheels, two clutch control levers, and a multipoint lever-operated, pedestal-mounted controller. What statement is true as it pertains to the operation of the warping heads and wildcats?

1. The wildcats can be rotated in either direction of rotation without rotating the warping heads by disengaging the warping head clutches. As long as electric power is applied to the electric drive motor, the warping heads will rotate.
2. The wildcats can be rotated in either direction of rotation without rotating the warping heads by disengaging the warping head clutches. As long as electric power is applied to the electric drive motor, the wildcats will rotate.
3. The warping heads can be rotated in either direction of rotation without rotating the wildcats by disengaging the wildcat clutches. As long as electric power is applied to the electric drive motor, the warping heads will rotate. ✓
4. The warping heads can be rotated in either direction of rotation without rotating the wildcats by disengaging the wildcat clutches. As long as electric power is applied to the electric drive motor, the wildcats will rotate.

What form of communication provides the greatest information richness, which is the amount of verbal and non-verbal information that a communication channel carries?

1. One-on-one, face-to-face ✓
2. Telephone conversation
3. Large-group meeting
4. Small-group meeting

Elevated metal levels present in a recent sample of used diesel engine crankcase lubricating oil is indicative of a condition. What would high silicon levels indicate?

1. The lubricating oil has become contaminated with sand, dust, and dirt. ✓
2. The lubricating oil's detergent additives have become depleted.
3. The lubricating oil has become excessively diluted with fuel oil.
4. The lubricating oil has become contaminated with engine coolant.

What standard mathematical formula is commonly used to calculate a vessels waterplane area for stability purposes?

1. Standard Logarithmic Rule
2. Simpsons Rule ✓
3. Reynolds Number Rule
4. Pythagorean Rule

As chief engineer of an oceangoing passenger vessel, it is important to know the effect of trim and stability of your ship in the event of damage to a compartment. To minimize the impact of flooding in the event of a grounding, what should be your ship's safe practice regarding watertight doors and hatches?

1. All watertight doors in subdivision bulkheads shall be kept closed during navigation except when necessarily opened for working of the vessel, and in such cases they shall always be ready to be immediately closed. ✓
2. All watertight doors in subdivision bulkheads shall be kept closed when the vessel is anchored except when necessarily opened for working of the vessel, and in such cases they shall always be ready to be immediately closed.
3. All watertight doors in subdivision bulkheads shall be kept open during navigation to facilitate crew movement and in all cases they shall always be ready to be immediately closed.
4. All watertight doors in subdivision bulkheads shall be kept open during normal operation, except during adverse weather when they shall be closed.

As shown in figure "D" of the illustrated digital power meter, what type of single-phase load is under test for power measurement? Illustration EL-0256

1. an inductive-resistive load ✓
2. a purely resistive load
3. a resistive-capacitive load
4. a purely inductive load

How is the direction of rotation of the main propulsion motor in a modern AC propulsion drive system reversed?

1. power directional relays
2. reversing the direction of current flow in the armature
3. changing the direction of current flow in the motor's field winding
4. electronically changing the phase sequence of the voltages generated by the power converter ✓

Which of the following procedures should be used to maintain a large electric motor during periods of inactivity?

1. Spraying a solvent periodically to remove carbon dust.
2. Compressed air should be blown over areas where dust is deposited.
3. A thin layer of air-drying varnish should be applied on the windings.
4. Space heaters should be used to prevent condensation of moisture. ✓

What problem with a printed circuit board may resolve itself once a board is removed from its edge card connector and then reinstalled?

1. Open traces or broken connections
2. Discolored or darkened components
3. Leaking components
4. Corroded pin connectors ✓

What is the most common and reliable type of circuit breaker used for high voltage practice aboard ship?

1. oil-break
2. air-break
3. gas-break
4. vacuum-break ✓

The platform construction support vessel to which you are assigned has a deck winch drive engine fitted with fuel injectors with the operating principle as shown in the illustration. In figure "A" which plunger travel position corresponds to when fuel injection begins? Illustration MO-0144

1. 1
2. 2 ✓
3. 3
4. 4

The main propulsion diesel engines on your anchor-handling supply vessel are fitted with conventional hydraulically operated injector nozzles of the orifice type. When testing an injector by performing a pop-test on an injector test stand, you observe no leakage prior to reaching the popping pressure, the pressure holds at just below the popping pressure, the actual popping pressure is within specification, but the spray pattern is distorted. What maintenance is required?

1. The injector spring compression must be readjusted or a broken spring replaced.
2. The injector needle valve and seat must be reconditioned or replaced.
3. The injector nozzle tip orifices must be reconditioned by cleaning or the tip replaced. ✓
4. The injector spindle and nozzle holder bore must be reconditioned or replaced.

The turbochargers on the main propulsion engines on the OSV to which you are assigned are fitted with an exhaust inlet screen to protect the turbocharger turbine. Upon inspection, pieces of broken piston rings or exhaust valves are found in the foreign object trap box. Besides removing this debris, with respect to the screen what should be done?

1. The screen should be magnafluxed to check for damage not visible to the naked eye. ✓
2. The screen should be replaced without conducting any further checking or investigation.
3. The screen should be placed in a press to remove any indentations from impingement.
4. The screen should be replaced only when damage is obvious to the naked eye.

The oil platform supply vessel to which you are assigned has a pneumatic propulsion control system as shown in the illustration. When the mechanical slave remote control station is being used to control propulsion, what is the direct result of positioning the control lever in the ahead direction? Illustration MO- 0168

1. Movement of the mechanical slave remote control station lever directly shifts the pneumatic remote control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction.
2. Movement of the mechanical slave remote control station lever directly shifts the clutch actuator 4-way control valve to the ahead direction by the action of a chain or cable.
3. Movement of the mechanical slave remote control station lever directly shifts the engine room control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction.
4. Movement of the mechanical slave remote control station lever directly shifts the pilot house pneumatic master control station lever control valve spool by the action of a chain or cable which results in pneumatic shifting of the clutch actuator 4-way control valve to the ahead direction. ✓

Due to the questionable mineral content of fresh water taken on from shore as a source of make-up water for diesel engine closed, recirculating cooling water systems, besides chemical treatment and coolant testing, what is the best line of defense in minimizing cooling system problems?

1. Maintaining a tight system and promptly repairing leaks ✓
2. Maintaining cooling water temperatures at lower-than-normal values
3. Increasing the frequency of draining, flushing, and re-filling the system
4. Maintaining cooling water temperatures at higher-than-normal values

You are about to perform valve stem to rocker arm clearance adjustments on an auxiliary diesel engine onboard your offshore supply vessel. Which of the following statements concerning hot and cold clearances is true?

1. When comparing hot and cold valve clearances, the hot clearance will always be greater than the cold clearance for a given valve application.
2. When comparing hot and cold valve clearances, the hot and cold valve clearances for a given valve application will always be identical.
3. When comparing hot and cold valve clearances, the hot clearance will always be less than the cold clearance for a given valve application. ✓
4. When comparing hot and cold valve clearances, it is not possible to predict the hot and cold clearances relative to one another for a given valve application.

When checking the valve stem to rocker arm clearances on an auxiliary diesel engine onboard your OSV, which of the following statements concerning intake and exhaust clearances when taken cold is correct?

1. When taken cold, a properly adjusted exhaust valve clearance would definitely be less than the intake valve clearance.
2. When taken cold, a properly adjusted exhaust valve clearance would definitely be greater than the intake valve clearance. ✓
3. When taken cold, a properly adjusted exhaust valve clearance would definitely be equal to the intake valve clearance.
4. When taken cold, a properly adjusted exhaust valve clearance could be less than or greater than the intake valve clearance.

An engine that emits black smoke through the stack may indicate a misfiring cylinder. Assume that the auxiliary diesel engines on your oil platform supply vessel have a fuel injection system that permits the injectors to be disabled for troubleshooting purposes by loosening the high-pressure fuel injection line fitting at the injector nozzle while the engine is running and noting the response of the engine in terms emission of black smoke. Which of the following statements is true?

1. After disabling the injector of a given cylinder, if the engine previously producing a clear exhaust now produces black smoke, this indicates that the cylinder associated with the disabled injector is misfiring.
2. After disabling the injector of a given cylinder, if the engine previously producing black smoke now produces even denser black smoke, this indicates that the cylinder associated with the disabled injector is misfiring.
3. After disabling the injector of a given cylinder, if the engine previously producing black smoke now produces a clear stack, this indicates that the cylinder associated with the disabled injector is misfiring. ✓
4. After disabling the injector of a given cylinder, if the engine previously producing black smoke continues to produce equally dense black smoke, this indicates that the cylinder associated with the disabled injector is misfiring.

The main engines on your offshore supply vessel utilize a starting system similar to that shown in the illustration. When starting the engine, an excessive amount of oil mist exits the air starter exhaust port. Which of the listed conditions would account for this? Illustration MO-0203

1. The in-line lubricator siphon tube is excessively restricted.
2. Excessive oil within the engine's cylinders is being pumped.
3. The in-line lubricator needle valve degree of opening is insufficient.
4. The in-line lubricator needle valve degree of opening is excessive. ✓

You suspect that a diesel generator set on your general-purpose offshore supply vessel has a defective unit injector because the engine, although warm, is running roughly. The two-stroke engine is fitted with mechanically operated unit injectors. When you push and hold down the #3 cylinder injector follower, there is no real change, as the engine continues to run roughly as before. What does this indicate?

1. Either the #4, #5, or #6 cylinder unit injector is faulty. The #1 and #2 cylinder unit injectors are functioning properly.
2. The #3 cylinder unit injector is faulty. You have successfully isolated the faulty unit injector. ✓
3. The #3 cylinder unit injector is functioning properly. One of the other cylinder unit injectors must be faulty.
4. Either the #1 or #2 cylinder unit injector is faulty. The #4, #5 and #6 cylinder unit injectors are functioning properly.

A turbocharged, two-stroke cycle main propulsion diesel engine on your offshore supply vessel is emitting gray to black smoke excessively from the stack. Upon comparing the measured air box pressure against a reference engine which is producing a clear stack, the measured air box pressure is determined to be too low. Which of the following conditions would most likely be the cause for the relatively low air box pressure?

1. Airside aluminum fins on after coolers are excessively restricted. ✓
2. Scavenging air intake ports are excessively restricted with carbon deposits.
3. Turbocharger exhaust turbine inlet screen is excessively restricted.
4. Exhaust silencer/muffler is excessively restricted with carbon deposits.

The offshore supply vessel to which you are assigned is fitted with a totally pneumatic propulsion control system as shown in the illustration. If propulsion control functions perfectly from the engine room control station, but will not function at all from any of the remote stations, which of the following system faults best accounts for these symptoms? Illustration MO-0168

1. The local/remote transfer valve at the engine room control station has a blocked remote port. ✓
2. The attendance valve at the pneumatic remote-control station has a blocked outlet port.
3. The local/remote transfer valve at the engine room control station has a blocked local port.
4. The pilot house/remote transfer valve at the pilot house has a blocked remote port.

You are preparing to change the oil of the speed control governor on one of the main propulsion diesel engines on your OSV. What statement is true concerning the draining and flushing procedures?

1. The governor oil should be drained while the oil is cold and the governor should be flushed with the heaviest grade of the same type of oil.
2. The governor oil should be drained while the oil is hot and the governor should be flushed with the heaviest grade of the same type of oil.
3. The governor oil should be drained while the oil is cold and the governor should be flushed with the lightest grade of the same type of oil.
4. The governor oil should be drained while the oil is hot and the governor should be flushed with the lightest grade of the same type of oil. ✓

In a closed, recirculating freshwater cooling system used for the diesel-generators on your offshore supply vessel, what function would chemical treatment with organic phosphates primarily perform?

1. Freezing point depression
2. Corrosion inhibition
3. Scale control and suppression ✓
4. Biological growth inhibition

You are assigned to an offshore supply vessel fitted with main propulsion diesel engines of the type shown in the illustration. How many degrees of crankshaft revolution are required for all of the engine's cylinders to fire? Illustration MO-0224

1. 180 degrees
2. 360 degrees ✓
3. 720 degrees
4. Not enough information is given to determine crankshaft degrees of revolution.

The pneumatic propulsion control system used on your offshore supply vessel is configured as shown in the illustration. In terms of clutch air system maintenance, what statement best represents operational requirements? Illustration MO-0168

1. Whereas the cleanliness of clutch air is critical, the dryness and pressure are clutch air are of secondary concern.
2. Whereas the clutch air pressure is critical, the dryness and cleanliness of the clutch air are of secondary concern.
3. Whereas the dryness of clutch air is critical, the pressure and cleanliness of the clutch air are of secondary concern.
4. The pressure, dryness, and cleanliness of clutch air are all critical to successful pneumatic propulsion control operations. ✓

The freshwater cooling systems serving the main engines of your offshore supply vessel are of the type shown in the illustration. What statement accurately describes the characteristics of the freshwater cooling circuit? Illustration MO-0137

1. The freshwater circuit is a pressurized system using a stationary/marine type 3-way thermostatic control valve for temperature control.
2. The freshwater circuit is a pressurized system using an automotive type 2-way thermostatic control valve for temperature control.
3. The freshwater circuit is a vented system using an automotive type 2-way thermostatic control valve for temperature control.
4. The freshwater circuit is a vented system using a stationary/marine type 3-way thermostatic control valve for temperature control. ✓

The platform supply vessel to which you are assigned has a pneumatic propulsion control system as shown in the illustration. What statement is true concerning transfer of control? Illustration MO-0168

1. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the engine room control station or vice versa.
2. The transfer valve at the engine room control station is used to transfer control of propulsion from the engine room control station to the pilot house pneumatic master control station or vice versa. ✓
3. The transfer valve at the pneumatic remote-control station is used to transfer control of propulsion from the pneumatic remote-control station to the mechanical slave remote control station or vice versa.
4. The transfer valve at the pilot house pneumatic master control station is used to transfer control of propulsion from the pilot house master control station to the mechanical slave remote control station or vice versa.

How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic systems?

1. Seal any cracks in lines with Permatex.
2. Clean the fittings before they are disconnected. ✓
3. Place drip pans under leaky fittings.
4. Coat all threads with graphite oil.

Of the views labeled "1", "2", "3", and "4", select the one that correctly represents the right side view of the unnumbered object in the illustration. Illustration GS-0003

1. 1
2. 2
3. 3
4. 4 ✓

Where would you find a list of the firefighting equipment required on your vessel?

1. Certificate of Inspection ✓
2. In the captain's desk
3. Official logbook
4. Muster List ("Station Bill")

The gas that exists in the stratosphere forming a protective shield that helps to protect the environment from the harmful effects of ultraviolet radiation is called what?

1. radon
2. ozone ✓
3. nitrogen
4. oxygen

If a refrigeration system, equipped with a reciprocating compressor, has a liquid-line solenoid valve that is leaking during the "off" cycle, what would this cause?

1. refrigerant slugs in the receiver
2. noisy compressor operation upon starting ✓
3. high superheat in the outlet coil
4. low suction pressure

High suction pressure accompanied by low suction temperature to a refrigeration system compressor is caused by which of the following?

1. a clogged liquid-line strainer
2. the expansion valve is insufficiently opened
3. the king valve is insufficiently open
4. the expansion valve being open too wide ✓

In a compression type automatic grease cup, the lubricant is forced into the bearing by__________.

1. a pressure gun
2. gravity flow
3. a Zerk fitting
4. spring force ✓

One of the means of alternative dispute resolution regarding a collective bargaining agreement dispute is arbitration. What is meant by arbitration?

1. Direct, in-house negotiated settlement between company and union representatives.
2. Settlement reached as the result of litigation as part of a judicial proceeding in court.
3. Agreement to abide by a binding decision rendered by a company and union agreed-upon impartial person. ✓
4. Negotiated settlement between company and union representatives facilitated by a mediator.

One of your ship's indirect-drive steering gear drive motors needs to be replaced. In accordance with 46 CFR Subchapter J, what minimum short-time rating should the replacement motor have in hours?

1. 1/4 hour
2. 1/2 hour
3. 1 hour
4. Continuous operation at 15 percent load followed by 1 hour at full load. ✓

Prior to arrival in Charleston, SC your vessel must conduct drills within 48 hours prior to entry and log that in the vessel logbook. Alternatively, you can log regularly scheduled quarterly drills according to 33 CFR regulations governing ports and waterways safety. Which of the following are included in the drills that must be performed? (1) Operation of the main steering gear from within the steering gear compartment. (2) Operation of the means of communications between the navigating bridge and the steering compartment. (3) Operation of the alternative power supply for the steering gear, if the vessel is so equipped. (4) Operation of the low lube pressure trip on the main engine. (5) Operation of the reverse power relay on the ship's diesel generator.

1. Drills 1,4,3
2. Drills 1,3,5
3. Drills 2,3,5
4. Drills 1,2,3 ✓

Which of the following statements concerning immersion suits is correct?

1. Suits are not required to automatically turn an unconscious person face-up in the water.
2. The immersion suit seals in all body heat and provides protection against hypothermia for weeks.
3. The suit is flameproof and provides protection to the wearer while swimming through burning oil.
4. The suits provide for limited body movement such as walking, climbing a ladder, and picking up small objects like a pencil. ✓

The purpose of the four water pockets located on the underside of a life raft, is to _________.

1. stow rainwater; these four spaces will not take up valuable space
2. act as stabilizers by filling with sea water as soon as raft is inflated and in an upright position ✓
3. hold the fresh water required by regulation to be provided in the raft when packed
4. none of the above

How would you ensure that your crew is prepared to combat a shipboard fire using ship's equipment?

1. Check training records, to see if crew members have attended a firefighting training course.
2. Show crew generic fire training videos.
3. Conduct required drills, simulating fire conditions and training with ship's equipment. ✓
4. Have them read a firefighting text book.

The state of charge of a stored pressure type dry chemical fire extinguisher can be readily determined by __________.

1. weighing the CO2 cartridge
2. weighing the cylinder
3. visual inspection of the pressure gage ✓
4. removing the lid and checking the level of dry chemical

The principal personnel hazard unique to Halon fire extinguishers is _________.

1. inhaling toxic vapors produced when exposed directly to a flame for extended periods ✓
2. displacement of oxygen
3. eye irritation produced immediately after discharge from cylinder
4. skin irritation

You notice smoke coming from an open laundry room doorway, which smells like electrical insulation. After activating the fire alarm, which of the following would be the lowest action priority?

1. Close the door to the room.
2. Locate the nearest CO2 or dry chemical extinguisher.
3. Secure power to the washers and dryers.
4. Break out the nearest fire hose. ✓

The "flammable limits" of an atmosphere are the __________.

1. upper and lower percentage of vapor concentrations in an atmosphere which will burn if an ignition source is present ✓
2. two temperatures between which an atmosphere will self-ignite
3. upper and lower pressures between which an atmosphere will not burn
4. two temperatures between which an atmosphere will burn if an ignition source is present

What term is listed on a Safety Data Sheet (SDS) to describe a chemical that can produce life-threatening or seriously disabling health hazards?

1. Moderate toxicity
2. Low toxicity
3. High toxicity ✓
4. Recommended toxicity

An LNG carrier has an approved type of gas detecting system to detect methane leaks in the __________.

1. barrier spaces
2. boiler burner supply piping
3. cargo handling rooms
4. all of the above ✓

During fueling operations oil is detected in the water adjacent to your vessel. If however, it is determined to be from some source other than your vessel, you should __________.

1. secure operations until the exact type of oil is determined
2. notify the Coast Guard ✓
3. make an entry in the Oil Record Book to that effect
4. all of the above

According to Coast Guard Regulations (46 CFR), no vessel can come alongside or remain alongside a tank vessel while it is loading A, B, or C grade cargo without having the permission of the __________.

1. tank vessel owner
2. officer in charge of the vessel which is loading ✓
3. terminal manager
4. USCG captain of the port

The instrument shown in the illustration has not been used for several weeks. Prior to its use for testing a compartment, you should __________. Illustration SF-0003

1. check or renew the batteries
2. purge the meter
3. adjust the meter pointer to zero
4. all of the above ✓

To prevent shaft currents in an alternator, the outboard bearing shell or outboard bearing pedestal is insulated. If the methodology used is the insulated bearing pedestal, how is the pedestal insulation evaluated?

1. Measuring the resistance between the bearing pedestal and the bearing bedplate of an assembled machine with a 500-Volt megohmmeter.
2. Measuring the resistance between the bearing pedestal and the bearing bedplate of a disassembled machine with a 500-Volt megohmmeter. ✓
3. Measuring the resistance between the bearing pedestal and the bearing bedplate of a disassembled machine with a digital multimeter setup as an ohmmeter.
4. Measuring the resistance between the bearing pedestal and the bearing bedplate of an assembled machine with a digital multimeter setup as an ohmmeter.

As shown in figure "B" of the illustration, what statement is true concerning "regenerating" operation? Illustration EL-0162

1. by applying torque in the same direction of rotation direction, the motor briefly regenerates power back into the mains, which rapidly speeds up the motor
2. by applying torque in the same direction of rotation direction, the motor briefly regenerates power back into the mains, which rapidly slows down the motor
3. by applying torque in the opposite direction of rotation direction, the motor briefly regenerates power back into the mains, which rapidly slows down the motor ✓
4. by applying torque in the opposite direction of rotation direction, the motor briefly regenerates power back into the mains, which rapidly speeds up the motor

Referring to the illustration of a DC diesel-electric drive system, what type of DC propulsion motors are used? Illustration EL-0141

1. shunt wound where the field is wired in parallel with the armature
2. shunt wound where the field is separately excited from a non-controlled rectifier ✓
3. shunt wound where the field is separately excited from a controlled rectifier
4. series wound where the field is wired in series with the armature

When the operating handle of a molded-case circuit breaker is in the mid-position, what does this indicate?

1. the circuit breaker is switched on
2. the circuit breaker has tripped ✓
3. the circuit breaker is switched off
4. the circuit breaker has been reset

On a digital numerical display readout, what would be the minimum number of LED segments required to form and display any digit 0 through 9?

1. 6
2. 7 ✓
3. 8
4. 9

As shown in the illustrated block diagram for a digitized echo sounding system, what statement is true concerning the transmission and reception of acoustical energy? Illustration EL-0185

1. The acoustical energy is produced as a continuous wave and transmitted from the transducer and the reflected acoustical energy is received by the same transducer.
2. The acoustical energy is produced as a continuous wave and transmitted from one transducer and the reflected acoustical energy is received by a second transducer.
3. The acoustical energy is produced as rapid, short high intensity pulses and transmitted from the transducer and the reflected acoustical energy is received by the same transducer. ✓
4. The acoustical energy is produced as rapid, short high intensity pulses and transmitted from one transducer and the reflected acoustical energy is received by a second transducer.