UFIV – Chief Engineer, Revision & Practice Exams

A hydraulic system gear pump being fed from a reservoir frequently indicates signs of excessive pitting after two months of service. Which of the following would most likely contribute to this condition?

1. Abnormal pressurization is occurring in the reservoir.
2. Operating oil temperature is determined to be below normal.
3. A partial restriction in the return line has developed.
4. A vacuum condition has developed in the reservoir. ✓

When the helm angle position is changed, the series of corresponding events of the steering gear will include __________. I.rate of steering gear ram movement will be proportional to amount of helm angle input II.degree of tilting plate (box) angle will be proportional to the amount of helm angle input

1. I only
2. II only
3. Both I and II ✓
4. Neither I nor II

Leadership style sometimes must change with the readiness level of the employees. Which of the following employee readiness level scenarios would be best suited for adopting a delegating leadership style?

1. Where the employees are able and willing or confident. ✓
2. Where the employees are able but unwilling or insecure.
3. Where the employees are unable and unwilling or insecure.
4. Where the employees are unable but willing or confident.

Of all the individual components of a pre-fire planning package, which component contains information about emergency duty station locations and responsibilities for each crew member by position AND name?

1. Station bill
2. Muster list ✓
3. Fire control plan
4. Pre-fire plan

Resonant vibrations, which can cause machinery failure, occur when which of the following conditions happen?

1. The machinery is operated at the natural frequency with no external forces in play.
2. The natural frequency of the machinery is the same as the free vibration frequency.
3. A forced frequency is placed on a piece of operating machinery.
4. The frequency of an external vibration is the same as one of the natural frequencies of the machinery. ✓

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

1. replace the entire belt set ✓
2. ensure the seasoned belts are reinstalled in their proper sequence
3. ensure the proper belt dressing is applied
4. season the new belt prior to installation

To prevent motor overload during start-up of a hermetically sealed centrifugal refrigeration system, what is true concerning the compressor suction gas variable inlet guide vanes?

1. opened until the motor is connected across the line at full voltage and current drawn is up to full load current
2. closed until the motor is connected across the line at full voltage and current drawn is up to full load current
3. closed until the motor is connected across the line at full voltage and current drawn is below full load current ✓
4. opened until the motor is connected across the line at full voltage and current drawn is below full load current

Technicians servicing small refrigeration appliances can employ what type of recovery equipment?

1. passive only
2. active only
3. either active or passive ✓
4. do not need to recover the refrigerant

Wooden shoring, with a cross-sectional dimension of 4" X 4" should not be longer than __________.

1. 8 feet
2. 10 feet ✓
3. 16 feet
4. 20 feet

Following a grounding, you can best determine that a SLACK fuel oil tank has been holed by __________.

1. checking fuel oil strainers
2. sounding the tank ✓
3. waiting for the vessel to list
4. examining tank boundaries

Progressive flooding in the engine room may be minimized by securing watertight boundaries and _________.

1. pumping out flooded compartments ✓
2. dumping fuel oil
3. transferring reserve feedwater
4. evacuating the engine room

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

A fire can be extinguished by removing __________.

1. the heat
2. the fuel
3. the oxygen
4. any of the above ✓

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

1. label the fixed firefighting system
2. store paint cans on metal shelves only
3. not allow oily rags to accumulate in the space ✓
4. place a portable fire extinguisher immediately outside the locker

During an inspection of a ships storeroom, you find sealed containers of chemicals labeled "potassium bicarbonate" and "potassium chloride". These chemicals are most commonly used aboard ship for _______.

1. descaling evaporator tubes
2. recharging dry chemical fire extinguishers ✓
3. degreasing machinery parts
4. engine jacket water treatment

Why is it essential to introduce CO2 from a fixed fire extinguishing system, into a large engine room, as quickly as possible?

1. The fire may warp the CO2 piping.
2. To keep the fire from spreading through the bulkheads.
3. Carbon dioxide takes a long time to disperse to all portions of a space.
4. Updraft from the fire tends to carry the CO2 away. ✓

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

1. easily removable
2. flame resistant
3. non-conducting ✓
4. wet

The rate of heat transfer in a water-tube auxiliary boiler can be increased by __________.

1. operating the boiler at less than normal water level
2. installing fins on the firesides of water-tubes ✓
3. increasing the amount of excess air to the burners
4. treating the boiler water with chemical oxygen scavengers

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

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.

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. ✓

In order to minimize the abrasive action of dust particles entering the combustion spaces of the diesel engines used on the fishery research vessel to which you are assigned, each engine is protected with a heavy-duty air intake filter. Which one of the listed air intake filter elements is periodically cleaned as opposed to being periodically replaced with a new element?

1. Multi-tube filter element.
2. Panel-type filter element.
3. Spiral-rotor filter element.
4. Wire-mesh filter element. ✓

The turbocharged, four-stroke, main propulsion diesel engines on your fishery research vessel are protected with dry-type air intake filters. The engines are fitted with dial-type restriction indicators measuring the pressure in the air duct between the air intake filter and the turbocharger blower inlet. Under what conditions should the air intake filters be evaluated using the restriction indicators?

1. The engine should be running at rated RPM with full load (propulsion clutch engaged). ✓
2. The engine should be running at idle RPM with minimal load (propulsion clutch engaged).
3. The engine should be running at rated RPM with no load (propulsion clutch disengaged).
4. The engine should be running at idle RPM with no load (propulsion clutch disengaged).

Assuming the use of ultra-low sulfur content diesel fuel, what combination of conditions associated with uninspected fishing industry vessel engine room operations would require the most frequent draining of exhaust systems of condensation?

1. Winter operations with lengthy ship escort transit times.
2. Winter operations with prolonged idling on station. ✓
3. Summer operations with prolonged idling on station.
4. Summer operations with lengthy ship escort transit times.

Assuming the use of low sulfur content diesel fuel, what combination of conditions associated with uninspected fishing industry vessel engine room operations would most contribute to internal corrosion of exhaust systems?

1. Low ambient temperature and low engine load ✓
2. Low ambient temperature and high engine load
3. High ambient temperature and low engine load
4. High ambient temperature and high engine load

The raw water boxes of the freshwater coolers serving the main propulsion diesel engines on your uninspected fishing industry vessel are fitted with sacrificial zinc anodes. Upon inspection, at what percentage of deterioration should the zinc anodes be replaced?

1. 25%
2. 50% ✓
3. 75%
4. 100%