Marine Propulsion & Engineering System Flashcards
A carburetor is required to have a safety device called a(an):
backfire flame arrestor
All marine low speed diesel engines are of what design?
four-stroke
Diesel engines are considered safer than gasoline engines because :
the fuel used is less volatile
Exhaust gases in a two-stroke/cycle diesel engine are discharged through :
exhaust ports or valves
If an engine shuts down due to a high jacket water temperature, what action should be taken?
allow engine to cool gradually
One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is:
a minimum speed for the engines that limits the minimum speed of the vessel
The exhaust pipe shall be kept gas tight throughout its entire length because:
Carbon Monoxide may enter the internal portions of the vessel
What condition will result in the automatic shutdown of a diesel engine?
Low lube oil pressure
The term “separation” as used in oil purification refers to the removal of :
two liquids from each other
Why is it necessary to extend ventilators to the bilges?
to remove fuel vapors which are heavier than air
At a given erosion of piping and machinery will be minimized by utilizing :
superheated steam
A lower edge of a propeller blade when the blade is in a horizontal position and moving downward?
leading edge
The conical steel, or composition cone instaled on a propeller, known as fair waters, provide which of the following benefits?
reduce turbulence
Where a propeller shaft passes through the hull, which of the following will stop water from entering the vessel?
stuffing box
The instrument called the telegraph is used to :
Give signals to and from bridge
When the firing rate of a boiler is reduced, the flow of fuel should be :
reduced before the air flow
The type of chemical that can be used routinely so as to maintain the potable water’s quality of hygiene is:
Chlorine
When a misalignment between the pump and its driving source exceeded that specified by the manufacturer of the pump, the shaft :
bearing will be overloaded and will fail
Which of the listed typeof valves could be damaged if it is used for regulating the flow of fluid through a piping system?
Gate valve
In an AC generator, the voltage induced in the armature windings is maximum when the field poles are :
rotating at a high speed
Why is protection equipment very essential in an electrical distribution system?
all of these are correct
Air that is trapped in the hydraulic fluid of a steering gear system would best be indicated by?
an improper rudder response
Which of the following units of a steering gear system will actuate the steering gear in conjunction with the hydraulic messages served by the telemotor?
ship servomotor
What will happen if one generator driving an engine automatically shuts down if there are two generators in parallel operation?
a circuit breaker will trip on reverse power
With gasoline engines, if a mechanical exhaust system is used, before starting the engine, you should run the exhaust blower at a sufficient time so as to :
ensure at least one complete change of air in the compartments concerned
A megohmeter is an instrument used to test for:
an open field coil
The capacitance is arranged in series on an AC circuit. If the line voltages remain constant, the capacitive reactance value can be varied by changing the :
line frequency
The term “Capacitance” is the property of an electrical circuit that resists or opposes any change in the?
voltage
In order to protect electric generators against any overload, they are fitted :
with fuses or circuit breakers
The basic unit of measurement for inductance is the :
Henry
What is the proper method of applying plastic electrical cable splice?
wind the tape sa that each turn overlaps the turn before it
What could be the purpose of a main switchboard circuit breaker reverse-power trip?
prevent alternator motorization
The precision instrument known as “wheatstone bridge” is used to measure :
Resistance
In order to check the three line fuses of a three-phase system consisting of three-phase motor, you should :
place the starter in the “stop” position
Which instrument may be used to check the resistance of insulation?
Megohmeter
As the amount of moisture content in the atmosphere increases, the difference between the dry-bulb and wet-bulb temperature will :
Decrease
Inside an air-conditioned room, you notice that the people inside are complaining of being too cool, what could be the most probable reason for this?
relative humidity is too low
The term “short cycling” in a refrigeration system means?
compressor stops and starts frequently
The usual characteristic of a refrgerant known as Freon is:
non-toxic
A characterisitc of Freon 12 is :
soluble when mixed with oil at lower viscosity and pour point
This is the ability of an oil to separate cleanly from an oil and water mixture.
demulsibility
The branch of science known as Hydrostatics deals mainly with _______.
fluids at rest
This the amount of heat absorbed by each unit mass of refrigerants as it flows through an evaporator:
Refrigerating
This term indicates the difference between the pressure at a point being measured and that of a perfect vacuum is called ________________ pressure.
Absolute
The energy associated with molecules is known as:
thermal energy
The type of energy that exist within a system as a result of the relative velocities of to or more objects is called:
Kinetic energy
Latent heat of water vapor in the air depends upon the:
Dry-bulb temperature
The ration of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, and expressed in grains is called the:
relative humidity
Whe the air reaches its dew point,therefore it is at its:
highest relative humidity
If there is a constant hissing sound at the thermal expansion valve, what does it means?
lack of refrigerant
What would most satisfactorily lower the humidity of the air being circulated by an air conditioning sytem?
cooling the air to a point below the dew point, then recooling it
A type of stabilizer that usually is fitted at the turn of the bilge and does not project beyond the vertical line from the ship’s side or below the horizontal line of the ship,s bottom.
non-rectangle fin
Sewage treatment systems on board a US inspected ship must be approved by which authority?
U.S. Coast Guard
The flame screens installed on a sewage tank vents prevents explosion by:
dissipating the heat of fire
This is the process of separation of the more volatile parts of petroleum oil from those less volatile by vaporization and subsequent condensation.
Distillation process
This is a hydraulic accumulator that is designed to _____.
store fluid under presure
If a hydraulic pump is operated at maximum efficiency, will it be a cause to overheat?
pumps internal slippage when excessive will cause it to overheat
The oil levels in a hydraulic system reservoirs should be maintained at a recommended level in order to:
all of these are correct
Which power source will actuate a solenoid valve?
electric current
Why do you think Dcseries motors are used extensively for electric drives on winches?
they are designed to operate ina stalled condition
This the ability of metals to be hammered or rolled out?
malleability
A large, low speed, main propulsion diesel engine is operating at a rated load and speed while the vessel is in a calm seas. As the intensity of the sea increases, the engine speed governor maintains the RPM, with the load indicator showing an increase in load beyond the allowable limits. Which action must be taken next?
decrease the engine RPM
With an internal combustion engine, it converts chemical energy into?
heat energy
The fuel injected into a diesel engine combustion chamber is generally ignited by _____.
heat of compression
If the piston rings are operating, what would you see visually?
shiny face and bottom, black top and back
What is the use of rotating pistons?
reduce piston ring wear
If there is a sudden unloading of a diesel engine, it will cause _____?
overspeed trip
The number of crankshaft revolutions to complete one cycle if it is a two-stroke cycle engine is:
one revolution
The nmostprobable reasonof a sudden drop in compression pressurein one cylinder is?
excessive early fuel injection
The instrument called the pyrometer is used to measures?
exhaust temperature
If you see that a diesel engine is emitting white smoke, it means?
low combustion temperature
The reversing system used on a 2-stroke cycle forted engine is:
rotating camshaft
The dirty F.O. strainer could be determined by?
decreasing pressure drop cross the strainer
If temperature of fuel decreases, which of the following will increase? I. Pour Point II. Viscosity
II only
If you have discovered a leak in the gasoling line to the engine, the best thing to do is?
close the fuel valve at the tank
The most practical method of detecting fuel oil injection to a cylinder of a running engine is:
chaecking the exhaust temperature regularly
If a lubricating oil is thinning out of high temperatures and thickening at low teemperature, it will have :
low viscosity index
Steam does work in an engine or turbine, it expands and :
decreases in superheat
Which is NOT a function of the steam drum of a marine water-tube boiler?
collects steam exhausted from the turbines
Stern tube and strut bearings lined with hardwood or rubber composition materials are lubricated with ?
saltwater
That type of the propeller, wherein blades are integral with the hub, the propeller is called:
solid propeller
What is the element that responds to the signal from the detecting element and gives a signal representing the controlled condition?
measuring element
On board tanker vessels, which type ofg valve is most commonly used in conjunction with hydraulically actuated control?
butterfly valve
The rudder stock in an electrohydraulic steering system is limited by:
a differential gear
The Coast Guard regulations require steering gear systems to be equipped with a means of steadying the rudder in an emergency. This can be accomplished by:
suitable arrangement of stop valves from the rams in the hydraulic piping
The meghometer is also connected to each end of an individual motor winding, a low ohm reading means :
good continuity
The instrument called an ohmeter is used to measure:
circuit continuity
To protect against overheating, circuits are fitted with:
circuit breaker
One ton per cubic meter represents:
mass density
The leads connected from a megohmeter are atteached to the leads of an AC motor field coil. A reading of infinity is obtained by indicatinga (an):
open field coil
What is the function of lubricating oil?
reduce the accumulation of harmful detergents
What is that expression re;ated to the cross-sectional area of shipboard electrical conductors?
millimeters
The rate of flow of electrical currents through a conductor is measured in:
amperes
Electrical power is expressed in:
watts
If the length of a wire is halved and the cross-sectional area is doubled, the resistance will be:
quartered
053101 If the piston stroke of a diesel engine is 10 1/2 inches and the speed of the crankshaft is 720 RPM, what is the average piston speed?
1260 feet/minute
What is the average piston speed if the piston stroke of a diesel engine is 10.5 inches and the speed of the crankshaft is 720 RPM?
1260 feet/minute
What is the average piston speed of a five cylinder low speed engine which has a bore of 29.5 inches, a stroke of 63 inches, and a rated speed of 123 RPM?
1291 ft/min
A five cylinder low speed engine has a bore of 29 1/2 inches, a stroke of 63 inches, and a rated speed of 123 RPM. What is the average piston speed?
1291 ft/min
Between cylinders of a V-16 four-stroke cycle diesel engine, the firing interval is _______.
45.00’
What is the firing interval between cylinders of a V-16 four-stroke cycle diesel engine?
45.00’
What is the average piston speed of an engine with a 12 inch stroke operating at 900 RPM?
450 ft/min
Calculate the average piston speed of an engine with a 12 inch stroke operating at 900 RPM.
450 ft/min
Which cylinder liner surface condition indicates proper lubrication?
A bright appearance
Which of the following cylinder liner surface condition indicates proper lubrication?
A bright appearance
Modern marine diesel engines having mechanical fuel injection operate on a combustion cycle which is __________.
a combination of constant volume and constant pressure
Having mechanical fuel injection, modern marine diesel engines, operate on a combustion cycle which is:
a combination of constant volume and constant pressure
Modern marine diesel engines having mechanical fuel injection operate on a combustion cycle which is __________.
a combination of constant volume and constant pressure
Having mechanical fuel injection, modern marine diesel engines, operate on a combustion cycle which is:
a combination of constant volume and constant pressure
The crankcases of many diesel engines are kept under a slight vacuum by _______.
a crankcase exhaust fan
Crankcases of many diesel engines are kept under a slight vacuum by which of the following may be the cause?
a crankcase exhaust fan
When one cylinder of a diesel engine has persistent knocking that does not cease when the fuel supply to that cylinder is cut off, which may be the cause?
A mechanical defect in a working part
Which may be the cause when one cylinder of a diesel engine has persistent knocking that does not cease when the fuel supply to that cylinder is cut off?
A mechanical defect in a working part
Which instrument is used to take crankshaft web deflection readings?
A strain gauge
It is an instrument is used to take crankshaft web deflection readings.
A strain gauge
A substantial increase in crankcase pressure could be an indication of _______.
a worn cylinder liner
What does a substantial increase in crankcase pressure indicates?
a worn cylinder liner
The main function of tie rods in the construction of large, low speed diesel engines is to ________.
accept most of the tensile loading that results from the firing forces developed during operation
What is the main function of tie rods in the construction of large, low speed diesel engines?
to accept most of the tensile loading that results from the firing forces developed during operation
Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are ______.
adjustable to meet lubrication requirements
For diesel engine cylinders, mechanical lubricators are usually small reciprocating pumps which are ______.
adjustable to meet lubrication requirements
The highest pressure in a diesel engine cylinder normally occurs _________.
after TDC
Normally, the highest pressure in a diesel engine cylinder occurs:
after TDC
The power developed by a large, slow speed main propulsion diesel engine is dependent upon the ________.
all of these
A power developed by a large, slow speed main propulsion diesel engine is dependent upon which of the following?
all of these
A diesel engine should not be operated at low loads for long periods of time because ________.
all of these
What are the reasons why diesel engine should not be operated at low loads for long periods of time?
all of these
Routine monitoring of a diesel engine should include __________.
all of these
The routine monitoring of a diesel engine should include which of the following?
all of these
The rate of wear on a cylinder liner depends on the _______.
all of these
If a crankcase explosion occurs in a diesel engine, you should stop the engine and ________.
allow the engine to cool naturally
In a diesel engine, if a crankcase explosion occurs, you should stop the engine and ________.
allow the engine to cool naturally
The direct cause of a crankcase explosion could be _______.
an overheated bearing
What could be the direct cause of a crankcase explosion?
an overheated bearing
In the operation of a large, low-speed, two-stroke diesel engine equipped with separate cylinder lubrication, fixed rate should be increased during which of the following operating conditions?
Any of the above
What may result if the clearance between a piston and cylinder liner is insufficient?
Any of these
If the clearance between a piston and cylinder liner is insufficient, it may result to:
Any of these
One advantage of dry cylinder liners in a diesel engine is that they ________.
are less complicated to replace than wet liners
What is one of the advantage of dry cylinder liners in a diesel engine?
they are less complicated to replace than wet liners
Engine displacement is equal to cylinder ________.
area times the stroke, times the number of cylinders
Engine displacement is equal to piston ________.
area times the piston stroke times the number of cylinders
Maximum horsepower of a diesel engine is attained ________.
at rated engine RPM
How is the maximum horsepower of a diesel engine attained?
at rated engine RPM
Which diesel engine component has oil grooves?
Bearings
Most practical diesel engines today operate on a cycle which is a combination of the Diesel and Otto cycles. In this process, compression ignition ___________.
begins on a constant volume basis
The inside diameter of an engine cylinder is called the ________.
bore
What do you call the inside diameter of an engine cylinder?
bore
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing work. This is known as ________.
brake
This is known as the most important factor in engine performance is the actual power output at the end of the crankshaft available for doing work.
brake
On a large low speed propulsion diesel engine, lower main bearing wear is usually measured by using a/an ________.
bridge gauge
What instrument is used to measure the lower main bearing wear on a large low speed propulsion diesel engine?
bridge gauge
When carbon accumulations at the air inlet ports of a two-stroke/cycle engine are cleaned you should take care to avoid ________.
carbon entering the cylinder
In a diesel engine, blow-by _______.
causes excessive crankcase pressure
The crankcase of many diesel engines are kept under a slight vacuum by the _______.
crankcase exhaust fan
Which of the following is common to two-stroke, low speed main propulsion diesel engines?
Crosshead construction
The compression ratio of a diesel engine refers to a ratio of ________.
cylinder clearance volumes at top dead center and at bottom dead center
Failure to remove the carbon ridge at the top of the cylinder when you are removing a piston may result in ________.
damaged upper piston rings and/or ring lands
The bore of a diesel engine describes the __________.
diameter of the cylinder
(Piston area) x (Piston stroke) x (numbers of the cylinders) = engine __________.
displacement
How many power strokes per crankshaft revolution are there in an eight cylinder, two-stroke/cycle diesel engine?
Eight
Cavitation erosion in the cooling water system of a diesel engine usually occurs at the pump impeller and on the waterside of the ________.
engine cylinder liners
The purpose of an oil mist detector in a main propulsion diesel engine is to warn of _______.
excessive mist density
What would cause excessive consumption of lubricating oil in a diesel engine?
Excessive piston ring wear
Exhaust gases in a two-stroke engine are discharged through __________.
exhaust ports or valves
When oil vapor, oxygen, and hot spots are produced at the same time within a crankcase, what could be the result?
Explosion
What could be the result when oil vapor, oxygen, and hot spots are produced at the same time within a crankcase?
Explosion
A piston is at bottom dead center when it is ________.
farthest from the cylinder head
Persistent knocking of one cylinder of a diesel engine that ceases when the fuel supply to that cylinder is bypassed may be caused by _______.
faulty combustion in that cylinder
A disadvantage of a four-stroke/cycle diesel engine is __________.
fewer power strokes per revolution of the crankshaft
What is a disadvantage of a four-stroke/cycle diesel engine?
fewer power strokes per revolution of the crankshaft
In engines of equal horsepower the higher exhaust gas temperature would occur in a/an __________.
four-stroke/cycle engine
What factor has the greatest effect on the mechanical efficiency of a diesel engine?
Friction within the engine
Compared to four-stroke cycle engines, two-stroke cycle engines have the disadvantage of __________.
higher cylinder head temperatures
The air-fuel ratio of a diesel engine engine operating at a light load is _________ full load.
higher than at
A disadvantage of a two stroke cycle diesel engine is ________.
higher working temperature of piston and cylinder
What is a disadvantage of a two stroke cycle diesel engine?
higher working temperature of piston and cylinder
Turbocharged engines utilize valve overlap for ________.
improving cylinder scavenging
Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in __________.
increased horsepower
The bore of a diesel engine describes the __________.
inside diameter of the cylinder
During which stroke of a four-stroke/cycle diesel engine is the piston moving downward?
Intake stroke
In a four-stroke/cycle diesel engine, during which stroke is the piston moving downward?
Intake stroke
Which diesel engine cylinder liner has internal cooling water passages?
Integral liner
Diesel engine crankshaft deflection readings are generally taken at four crank positions. Good engineering practice requires the deflection gauge or indicator to be ________.
left in place for all four readings
The cubic inch displacement of an engine or cylinder is determined by the diameter of the piston and the _________.
length of the stroke
In some cases a cylinder liner can be refinished rather than replaced. Properly honed, the _______.
liner surface should have a crosshatch pattern
Poor combustion in a diesel engine could be caused by _______.
low intake air temperature
Immediately after any diesel engine is started, the engineer should check the __________.
lube oil pressure
The engineer should check the ____________ immediately after any diesel engine is started.
lube oil pressure
Carbon monoxide gas formation in the exhaust gases of a diesel engine can be eliminated by ________.
maintaining proper combustion and scavenging
The average pressure exerted on a piston during each power stroke is termed ________.
mean effective pressure
What is the term used for the average pressure exerted on a piston during each power stroke?
mean effective pressure
The ratio of the brake horsepower to the indicated horsepower of a diesel engine is its _______.
mechanical efficiency
A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM is commonly classed as a _________ speed diesel.
medium
The main characteristic of diesel engines which distinguishes them from other combustion engines is the __________.
method of igniting fuel
What is the main characteristic of diesel engines which distinguishes them from other combustion engines?
method of igniting fuel
Exhaust gases are generally removed from the cylinders of a two-stroke cycle diesel engine by __________.
natural aspiration
How are exhaust gases generally removed from the cylinders of a two-stroke cycle diesel engine?
natural aspiration
Cavitation erosion on the water side of wet cylinder liners is normally the greatest ________.
near the middle of the thrust side of the liner
A piston is said to be at top dead center when it is ________.
nearest to the cylinder head
When is a piston said to be at top dead center?
nearest to the cylinder head
The bottom water seal on a wet cylinder liner in a diesel engine must allow for liner axial movement. This seal is most commonly a ________.
neoprene O-ring
The knock which occurs when a cold diesel engine is started and run at low speed but stops when the engine has reached normal operating speed and temperature is _______.
normal for these conditions
The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center because _______.
of the expansion of the gases of combustion
The firing order of an in-line four-stroke/cycle, six-cylinder, auxiliary diesel engine is 1-5-3-6-2-4. When #1 cylinder is firing at top dead center, the #3 piston is ________.
on the intake stroke
In a single-acting two-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs _________.
once every crankshaft revolution
The power impulse in an individual cylinder occurs in a single-acting, two-stroke cycle diesel generator engine _____________.
once every crankshaft revolution
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in __________.
one complete crankshaft revolution in a two-stroke cycle
The four basic events, in diesel engines, (intake, compression, power and exhaust) are performed once in __________.
one complete crankshaft revolution in a two-stroke cycle
One end of a cylinder is sealed by the cylinder head and the other by the ________.
piston
An increase in diesel engine crankcase pressure generally indicates excessive ________.
piston ring blow-by
What method is commonly used in gauging the clearance between an engine’s main bearings and the crankshaft?
Plastigage
The method which is commonly used in gauging the clearance between an engine’s main bearings and the crankshaft is called:
Plastigage
To determine the main bearing clearance in a propulsion diesel engine, you should use a/an _______.
Plastigage
Why are some cylinder liners in diesel engines plated on the wearing surface with porous chromium?
Pores in the plating aid in maintaining the lube oil
How are the pressure and temperature affected in a diesel engine cylinder during compression?
Pressure and temperature increase
In a two-stroke/cycle, opposed piston diesel engine, one crankshaft operates advanced of the other crankshaft to ________.
prevent scavenge air pressure buildup in the cylinders
Integral water-jacket liners have O-rings near the bottom of the liner. These O-rings serve to _______.
prevent the escape of lubricating oil from the crankcase
The purpose of a counterbore in the top of the cylinder liner extending down to the top point of travel of the top compression ring is to ________.
prevent wear of the liner from forming a ridge at the upper level of ring travel
In the operating cycle of a four-stroke/cycle diesel engine, blowdown to exhaust manifold pressure must occur before the piston begins the exhaust stroke to avoid ________.
pumping losses
What occurs in the combustion space of a diesel engine cylinder shortly after ignition and before the piston reaches TDC?
Rapid increase in pressure and temperature
The crankcases of many diesel engines are kept under a slight vacuum to _______.
reduce the risk of explosion
A diesel engine crankcase ventilation system ________.
removes combustible gases from the crankcase
What is the effect of the crankcase ventilation system on some diesel engines?
removes combustible gases from the crankcase
A crack in a cylinder linder can be caused by _______.
restricted cooling water passages
Loop, uniflow, cross-flow and return-flow are terms used to describe various types of ________.
scavenging
A properly honed cylinder liner in a diesel engine will ________.
shorten the ring break-in period
The most rapid period of fuel combustion in a diesel engine cylinder should begin just before the piston reaches top dead center and _______.
should be completed after top dead center
Which of the following types of engines have a combustion chamber located between a cylinder head and the crown of a piston?
Single acting
In engines with a crosshead, the motion of the piston rod can be described as __________.
straight reciprocation
Crankshaft misalignment can cause fracture and failure of the crankshaft. One method of determining misalignment is by ________.
taking micrometer readings between the crank cheeks opposite the crankpin every 90 degrees of crank angle rotation
Which of the following would most affect the mean effective pressure of diesel engine cylinders?
Temperature of cooling water
Cylinder lubrication oil for low speed propulsion diesel engines is admitted to each cylinder during ________.
the compression stroke
If a crankcase explosion has occurred in a diesel engine and the crankcase remains intact, which is a proper precaution?
The crankcase should remain unopened until the engine has cooled
Fuel is ignited in a diesel engine cylinder by _______.
the heat of compression
A dry cylinder liner has certain advantages over a wet liner because ________.
there is less likelihood of water leaking into the combustion space
If the compression ratio is increased on any diesel engine, ___________.
thermal efficiency will increase
In a large, slow speed, main propulsion diesel engine which part is under tension when the engine is running?
Tie rod
In a large, two-stroke, loop-scavenged engine, the firing forces developed during operation produce heavy tensile loading on the engine structure. Which structural components absorb most of these forces and thereby reduce their effect upon the frame and bedplate?
Tie rods
If all other conditions such as bore, stroke, speed and mean effective gas pressures are equal, a two-stroke engine will develop approximately __________.
twice the indicated horsepower as a four-stroke cycle engine
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in __________.
two piston strokes in a two-stroke/cycle engine
Opposed piston diesel engines are classified as ________.
two-stroke/cycle single-acting
In a four-stroke/cycle engine, after the completion of the power stroke, the piston will then move _________.
up and force out the exhaust gases
If a crankcase explosion occurs in a diesel engine, what action should you take?
Wait until the engine has cooled before opening the crankcase
It is easier to replace a dry cylinder liner than a wet one because ________.
water seals and expansion joints are not required
Theoretical perfect combustion in a diesel engine yields by products of _______.
water vapor and carbon dioxide
The cylinder liner which forms the cylinder wall and inside of the water jacket is called a ________ liner.
wet
A diesel engine with high lugging capacity would be necessary for driving a __________.
winch
A substantial increase in crankcase pressure could be an indication of a/an _______.
worn cylinder liner
The BTU content of fuel oil is determined by a/an :
calorimeter
The instrument used to determine the BTU content of fuel oil.
calorimeter
________________ is the instrument used to determine the BTU content of fuel oil.
calorimeter
Which “end point” result is the most severe damage to boiler?
circulation
A sectional (sinuous) header boiler is classified as which type?
straight tube
The boiler working pressure is 460 psig. The safety valve lifts at 500 psig and blows down to 470 psig. The blowdown is what percentage of the working pressure?
6.5
Working pressure of a boiler is 470 psig. The safety valve lifts at 510 psig and blows down to 480 psig. The blowdown is what percentage of the working pressure?
6.4
About 480 psig is the working pressure of a boiler. The safety valve lifts at 520 psig and blows down to 490 psig. The blowdown is what percentage of the working pressure?
6.3
Your vessel steamed 6,350 n.miles in 18 days, 10 hours, 30 minutes. The pitch of the propeller is 17.5 feet and you turned an average of 90.4 RPM. What is the slip for the voyage?
8.07%
A vessel has steamed 6,350 n.miles in 18 days, 10 hours, 30 minutes. The pitch of the propeller is 17.5 feet and you turned an average of 90.4 RPM. Find the speed of the engine,
15.61 knots
What is the slip for the voyage if your vessel steamed 5,007 n.miles in 11 days, 06 hours, 30 minutes. The pitch of the propeller is 20.5 feet and you turned an average of 91.5 RPM.
0.00%
Determine the slip of your engine if your vessel has steamed 5,007 n.miles in 11 days, 06 hours, 30 minutes. The pitch of the propeller is 20.5 feet and you turned an average of 91.5 RPM.
No slip
Calculate the engine speed if your vessel steamed 5,007 n.miles in 11 days, 06 hours, 30 minutes. The pitch of the propeller is 20.5 feet and you turned an average of 91.5 RPM.
18.51 knots
To reduce a high water level boiler, you should:
use the surface blow
In order to reduce a high water level boiler, you should:
use the surface blow
An increase in crankcase pressure generally indicates _______.
worn engine cylinder liners
What does an increase in crankcase pressure generally indicate?
worn engine cylinder liners
