The flywheel on a marine diesel engine is fitted mainly to:
Motor Plants
Question · Easy
Lockout/tagout, called like a cup final
Short
What is the chief function of scavenging in a two-stroke-cycle marine diesel engine?
A marine diesel engine governor is best described as a device that:
The main function of a diesel fuel injection pump is to:
On a marine diesel, the primary purpose of fuel injection timing is:
Question · Medium
Never enter a tank before testing the air
A diesel will not start when starting air is admitted, although air pressure is normal. The most likely cause is that the:
The primary purpose of a turbocharger on a marine diesel is to:
Blue-grey exhaust smoke from a diesel engine most often indicates:
What is the principal reason a closed diesel jacket cooling system uses treated fresh water rather than raw seawater in the engine jackets?
If mean effective pressure (MEP) is 150 psi and the engine has a piston area of 100 in² with a stroke of 1 ft, the indicated work per power stroke is approximately:
Question · Hard
Cetane number of diesel fuel is primarily a measure of:
High-viscosity residual fuel oil is heated before injection mainly to:
On a suspected hot bearing or oil-mist alarm in a large diesel crankcase, the safest immediate action is to:
The expansion tank in a closed jacket cooling system is primarily provided to:
A full-flow lube oil filter is arranged so that:
Starting-air receivers for marine diesels are normally charged to a pressure on the order of:
If a diesel engine's charge-air cooler becomes fouled on the air side, the most likely operating effect is:
An isochronous governor is designed to:
Cylinder oil for a large two-stroke crosshead diesel is primarily intended to:
A diesel engine overspeeds when load is suddenly lost. The protective device that should shut off fuel is the:
Indicated horsepower (IHP) of a four-stroke single-cylinder engine can be estimated from:
Water in the fuel day tank is best removed by:
A stuck-open diesel injector that dribbles fuel is most likely to cause:
The main reason to pre-lube a large diesel before starting after a long shutdown is to:
Scavenge-air fire in a two-stroke diesel is typically associated with:
Compared with a naturally aspirated diesel of the same displacement, a turbocharged diesel typically has:
A diesel engine jacket water temperature that runs abnormally high while sea water pressure and flow appear normal most likely indicates:
The purpose of a diesel engine indicator card (or electronic cylinder pressure diagram) is to:
If fuel rack is at maximum and engine speed still falls under increasing load, the governor is:
A pyrometer reading much higher on one cylinder than the others most strongly suggests:
Relief valves on starting-air manifolds and bottles are fitted primarily to:
For a four-stroke diesel running at 900 rpm, the number of power strokes per minute in one cylinder is:
A wet-type exhaust system on a smaller OSV diesel mixes seawater with exhaust gases primarily to:
Lube oil pressure falls suddenly while the engine is running. The FIRST safe response is typically to:
Ignition delay in a diesel is the time between:
Ohm's law states that voltage (V) equals:
Electrical Electronics Control
A circuit draws 10 A at 120 V. The power consumed is:
On an ungrounded shipboard AC distribution system, a ground detection system is used to:
When paralleling two AC generators, the voltages must be matched and the synchroscope should be approaching the:
Real (kW) load sharing between paralleled generators is primarily adjusted by:
A 440 V, 60 Hz, 6-pole induction motor runs at 1,140 rpm under load. Its slip is approximately:
A reverse-power relay on a generator is intended to:
The chief hazard when charging lead-acid batteries in a closed space is:
For a three-phase system, line-to-line voltage is related to line-to-neutral voltage by a factor of approximately:
If phase voltage is 120 V in a balanced wye system, approximate line-to-line voltage is:
A magnetic motor starter's overload relay is intended to protect the motor from:
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