UFIV – Assistant Engineer, Revision & Practice Exams

Which of the following is required to be included in the fireman's (emergency) outfit?

1. Chemical protection face shield
2. Approved work vest
3. Self-contained breathing apparatus ✓
4. 5 cell approved flashlight

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

1. Only a light layer of clothing may be worn underneath.
2. They provide sufficient flotation to do away with the necessity of wearing a life jacket. ✓
3. They should be tight fitting.
4. A tear in the suit will not appreciably reduce its value.

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

1. oil-soaked rags are stowed in the machine shop ✓
2. powdered aluminum is stowed dry
3. dry metal turnings accumulate
4. all of the above

Paints and solvents used aboard a vessel should be __________.

1. stowed safely at the work site until work is completed
2. covered with a fine mesh screen to protect from ignition sources
3. returned to the paint locker after each use ✓
4. drained into a common container after each use

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

1. Each cylinder must weigh less than 50 pounds.
2. It has distribution piping installed permanently.
3. The cylinders are mounted horizontally.
4. It has a portable hose and nozzle. ✓

Which of the following conditions represents a particular advantage of using a positive pressure type self- contained breathing apparatus in an atmosphere that is immediately dangerous to life or health?

1. The positive pressure in the facepiece prevents contaminated air from entering the facepiece. ✓
2. The average operating time for most air cylinders is over an hour.
3. The equipment is compact and the wearer can work in confined spaces without difficulty.
4. The equipment used is lightweight and easy to wear by reducing physical strain on the wearer.

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

1. Deflate the floor of the raft to reduce the danger of capsizing ✓
2. Inflate the floor of the raft to provide for additional stability
3. Remove their life jackets to prepare for the transfer
4. Take in the sea anchor to prevent fouling of the rescue sling

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

1. Enabling the lead pump to pump against a shut-off head during periods of relatively low demand and the lag pump to recirculate when the demand is high.
2. Enabling both potable water pumps to cycle on and off together in response to system demand changes.
3. Enabling the lead pump to cycle on and off during periods of relatively low demand and the lag pump to assist the lead pump only when the demand is high. ✓
4. Enabling the lag pump to cycle on and off during periods of relatively low demand and the lead pump to assist the lag pump only when the demand is high.

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

1. 6 volts
2. 7.5 volts
3. 12 volts ✓
4. 18 volts

Periodic testing using a special sensing device may be performed to detect potentially dangerous loose or corroded bus bar and controller connections. What is the name of this testing technology?

1. infra-red thermography ✓
2. corrosion electrolysis
3. visual pyrotronics
4. electric vibro-analysis

An electric propulsion drive system in which the propulsion generator supplies power to both the propulsion motor and ship service loads is referred to as what type of system?

1. a composite system
2. a dedicated system
3. a multi-purpose system
4. an integrated system ✓

The safety heads of most large reciprocating compressors used in refrigeration systems are held in place by what means?

1. tack welding on the sides
2. large Teflon gaskets
3. discharge pressure in the relief valve return line
4. heavy coil springs ✓

Ships requiring extremely rapid maneuvering response using propeller shaft speed and direction as the sole means of controlling propeller thrust are most likely to use what type of drive system?

1. Diesel-electric drive ✓
2. Direct or geared diesel drive
3. Steam turbine geared drive
4. Gas turbine geared drive

What is meant by the term emergency bilge suction?

1. The means by which the machinery space bilge is pumped out by a pump not normally used as a bilge pump and drawing a suction on the bilge through either bilge manifolds or automatic bilge suction valves.
2. The means by which the machinery space bilge is pumped out by a pump not normally used as a bilge pump and drawing a suction directly on the bilge independent of any bilge manifolds or automatic bilge suction valves. ✓
3. The means by which the machinery space bilge is pumped out by a pump normally used as a bilge pump and drawing a suction directly on the bilge independent of any bilge manifolds or automatic bilge suction valves.
4. The means by which the machinery space bilge is pumped out by a pump normally used as a bilge pump and drawing a suction on the bilge through either bilge manifolds or automatic bilge suction valves.

What type of oil as part of an oily-water mixture is most likely to require heating to facilitate separation in an oily-water separator?

1. Marine diesel oil.
2. Heavy residual fuel oil. ✓
3. Steam turbine lubricating oil.
4. Diesel engine lubricating oil.

The output volume of a positive fixed displacement pump can be changed only by __________.

1. moving the shaft trunnion block
2. changing the angle of the tilting plate
3. changing the speed of the pump ✓
4. moving the slide block and rotor

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

1. the total current divided by the total resistance
2. the sum of the individual currents multiplied by the number of resistors
3. the total resistance divided by the total current
4. the sum of the individual voltage drops ✓

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

1. Rotary plunger type system
2. In-line multi-plunger type system
3. Unit injector type system ✓
4. Common rail type system

Diesel engine closed, recirculating cooling water systems are particularly prone to cavitation corrosion/erosion. Which of the listed cooling system/engine components has surfaces in contact with the coolant that are most susceptible to this type of corrosion and erosion?

1. Cylinder head cooling water passages
2. Cylinder cooling water jackets
3. Wet-type cylinder liners ✓
4. Engine exhaust cooling water jackets

You are attempting to start a deck winch drive engine fitted with an electric cranking motor where the battery electrolyte is frozen. What should be done to facilitate starting?

1. The battery electrolyte should be allowed to thaw, and then the battery electrolyte should be diluted with distilled water as necessary before attempting to start the engine.
2. The engine should be started by means of jumper cables connected to another battery without any particular concern regarding the electrolyte being frozen.
3. The battery electrolyte should be thawed by means of a battery charger, and then the battery should be recharged as necessary before attempting to start the engine.
4. The battery electrolyte should be allowed to thaw, and then the battery should be recharged as necessary before attempting to start the engine. ✓

For diesel engines, such as those used for main propulsion and auxiliary power on fishery research vessels, while running at speed, how is the ignition of fuel within the cylinder achieved?

1. Ignition is achieved by the heat of compression created by compressing the air/fuel mixture within the cylinder into a relatively small volume.
2. Ignition is achieved by the heat of compression created by compressing intake/charge air within the cylinder into a relatively small volume. ✓
3. Ignition is achieved by a high voltage electric spark induced across the gap of a specially designed spark plug.
4. Ignition is achieved by intense heat by passing electric current through the element of a specially designed glow plug.

When checking the cylinder jacket water cooling expansion tank level on a main propulsion diesel engine on your fishing factory ship while underway, what should be the expansion tank level?

1. The level should be in the upper part of the sight glass when the engine is at operating temperature. ✓
2. The level should be in the lower part of the sight glass when the engine is at operating temperature.
3. The actual level is unimportant as long as it is visible in the sight glass when the engine is at operating temperature.
4. The level should be out of sight high in the sight glass when the engine is at operating temperature.

When starting a deck winch drive engine in preparation for seine net handling operations, what parameter must be checked FIRST upon start-up to avoid immediate engine damage?

1. Fuel oil supply header pressure.
2. Engine lubricating oil supply header pressure. ✓
3. Winch gear oil pump discharge pressure.
4. Cylinder jacket water pump discharge pressure.

You are replacing a damaged high pressure fuel injection line for #1 cylinder on an auxiliary diesel engine onboard your fishery research vessel. Which of the following statements represents the best replacement practice or strategy?

1. Custom fabricate the fuel injection line minimizing length and bends to create the shortest possible replacement fuel injection line.
2. Replace the damaged fuel injection line with a factory-formed fuel injection line specifically fabricated for #1 cylinder line replacement. ✓
3. Custom fabricate the fuel injection line as close as possible to the fuel injection line being replaced in terms of bends and overall length.
4. Replace the damaged fuel injection line with a custom fabricated line without regard to the length and configuration of the bends of the original.

The main propulsion diesel engines fitted on your uninspected fishing industry vessel are started with vane- type air-starting motors. What statement concerning air-start motor lubricator maintenance is true? (Assume a metal bowl fitted with a tubular sight glass.)

1. The lubricator reservoir bowl should be re-filled with clean oil when the level is no longer visible in the glass.
2. The lubricator reservoir bowl should be re-filled with clean oil as soon as the level drops to the very upper part of the glass.
3. The lubricator reservoir bowl should be re-filled with clean oil when it becomes approximately half full as shown in the glass. ✓
4. The lubricator reservoir bowl should be re-filled with clean oil when it is estimated that the bowl is completely empty.

The main diesel engines on the uninspected fishing industry vessel to which you are assigned are fitted with a metal-edge duplex suction fuel strainer, where the elements must be periodically cleaned. The engine manufacturer recommends using a petroleum-based solvent for cleaning. Which of the following would typically be acceptable?

1. White mineral spirits.
2. Benzene or toluene.
3. Kerosene or diesel fuel. ✓
4. Perchlorethylene or trichlorethylene.

A deck winch drive engine fuel system on board your uninspected fishing industry vessel is prone to becoming air bound, and you suspect a fuel system piping leak. Assuming that the diesel fuel tank is beneath the engine, that the fuel booster pump is engine driven, and that the fuel injection pump is a high-pressure multi-plunger pump, where in the system would the leak most likely exist?

1. In the booster pump discharge line between the booster pump outlet and the fuel injection pump inlet.
2. In the fuel injection pump return line between the fuel injection pump return outlet and the fuel oil day tank (or booster pump suction as appropriate).
3. In the fuel injection pump high pressure fuel lines between the fuel injection pump high pressure outlets to the fuel injector nozzle inlets.
4. In the booster pump suction line between the day tank suction line and the booster pump inlet. ✓