USCG MKC SWE
Card Set Information
USCG MKC SWE
USCG MKC SWE
MKC study guide
Protection in circuits is accomplished by the use of:
Either fuses or circuit breakers
(circuit breakers are Prefured)
When using sychronizing lamps instrad of synchro scopes, the circuit breaker should be closed?
Just by the mid-point of the dark period is reached
The frequency of the generator can be controlled by?
Raising or lowering the Prime mover speed until 60hz is indicated
The proper way to mix electrolyte for a battery is to?
Add acid to the water
When measuring a/c current flow, you must always connect the meter:
in series w/the power source and load
The specific gravity of the electrolyte solution in a lead acid battery:
Gives an indication of charge of the battery
When correcting specific gravity readings of a lead acid battery for existing temperature conditions, you should:
Add 4 points for each 10^F above 80^F
What is the cause of a fuse or breaker failing or "blowing"?
The electrical current exceeds the rated value of the fuse or breaker
Where would you find the electrical resistance records?
In the machinery history
A hydraulic governor w/o a compensating device will?
In a three phase A/C motor, what can be done if the motor is operating in the wrong direction?
Switch any two leads
When working on a de-energized circuit with capacitors, what should you ensure has happened?
The capacitors have been discharged
The characteristic introduced into a truly constant speed governor employed for controlling the speed of paralleled engines is?
A generator circuit must be in the ________ position before manually starting.
A governor that automatically stops an engine when too high a speed is attained is called an?
The frequency can be changed by?
Raising or lowering the prime mover
What is the purpose of field windings in a dc generator?
To increase the armature current
What type of governor limits the max no load speed?
A variable speed governor
What is the primary difference between mechanical and hydraulic governors?
Control lever actuation
A megger measures what?
Resistance measured in OHMS
Infinity on a megger means what?
Very little or no resistance
What is meant by isochronous governong?
Speed remains the same under all load conditions
A control device that limits engine load @ various speed is called a?
In a compartment with high voltage electrical wiring, what is required?
Dead man's stick and shorting probe
Sensitivity in a governor would best be defined as?
The change in speed required before the governor will make corrective movement of the f/o control
An ammeter is always connected in _______ with the source.
A voltmeter is always connected in ________ with the source.
Promptness in a governor can be defined as?
Speed @ which a governor compensates for load changes
Stability in a governor can be defined as?
The ability of the governor to maintain the desired speed w/o fluctuation or hunting
In all engineering spaces containing switchboards or other installed high voltage electrical equipment, what must be located conspicuously?
A 25,000 volt safety shorting probe
An electric starting motor should not be operated for over ______ @ a time.
The smallest particle to which water can be reduced and still retain the chemical properties of water is?
The function of bus-ties on a switch board is to?
Permit any switch board to feed power to any other switch board
What should be stenciled in 3" high letters onboard every cutter under electrical matting?
Caution electrical matting missing
When paralleling 2 generators, the on-coming generator's voltage must be?
The voltage and frequency must be equal to the on-line generator
How are batteries rated by?
By ampere per hour
A single cell of a lead-acid battery can produce how much electricity?
1.5 volts per cell
A ground can be defined as an electrical connection between the wiring of a motor and?
Its metal framework
The number of cells is a 12 volt lead-acid battery is?
An electrical device which prevents an action from occuring until all other conditions are met is called?
A circuit breaker differs from a fuse in that a circuit breaker:
Trips to break the circuit and can be reset
The part of the fuse that melts and opens the circuits is usually made of?
Zinc or an alloy of tin and lead
When charging a lead acid battery, you should reduce the charging rate as the battery nears its full charge capacity to:
Prevent excessive gassing and overheating
Batteries used for diesel engine starting should be:
As close as possible to the engine
Violent gassing from a lead acid battery which it is being charged indicates?
The charging rate is too high
the pitting of controller contacts can be caused by:
Insufficient contact pressure
The rate @ which electrons flow is measured in?
Electrical resistance is measured in?
A charge that is given around the clock to maintain battery readiness @ all times of the battery is called?
A floating charge
NSTM chapter 1
NSTM chapter 41
NSTM chapter 42
Specifications and standards
NSTM chapter 44
Machenery space watch requirements
NSTM chapter 74
NSTM chapter 76
Reliability and maintenance
NSTM chapter 77
NSTM chapter 79
Stability and damage control
NSTM chapter 80
Intergrated logistics and support requirements
NSTM chapter 81
Maintenance of cutters and boats
NSTM chapter 83
NSTM chapter 85
Coast Guard naval engineering drawings
NSTM chapter 86
NSTM chapter 88
NSTM chapter 90
Inspections, records, reports, and test
NSTM chapter 91
Surveys of cutters and boats
NSTM chapter 94
Full power trials
NSTM chapter 97
NSTM chapter 110
NSTM chapter 233
Internal combustion engines
NSTM chapter 235
NSTM chapter 243
NSTM chapter 244
NSTM chapter 245
NSTM chapter 254
Condensers and heat X-changers
NSTM chapter 262
NSTM chapter 300
NSTM chapter 475
NSTM chapter 505
Flexible hose program
NSTM chapter 517
Auxilliary boilers and forced circulation steam generators
NSTM chapter 530
NSTM chapter 540
Gasoline, handling, and stowage
NSTM chapter 541
Fuel system, cutters and boats
NSTM chapter 542
Fuel system, shipboard aviation
NSTM chapter 550
Compressed gas cylinders
NSTM chapter 551
Compressed air cylinders
NSTM chapter 555
NSTM chapter 556
NSTM chapter 570
General duty and replenishment weight handling systems
NSTM chapter 571
Replenishment at sea systems
NSTM chapter 573
Cargo handling systems
NSTM chapter 581
Anchor and anchor chain maintenance
NSTM chapter 583
Life rafts, life floats, and boat hoisting equipment
NSTM chapter 588
NSTM chapter 589
NSTM chapter 591
Oceanographic research equipment
NSTM chapter 593
Environmental pollution control systems
NSTM chapter 613
NSTM chapter 630
preservatives and coverings
NSTM chapter 634
NSTM chapter 635
NSTM chapter 640
Living and berthing spaces
NSTM chapter 670
Stowage, handling, and disposal of hazardous materials
NSTM chapter 700
NSTM chapter 834
NSTM chapter 997
Docking instructions for cutters and boats
What is the form # of the CER (cutter engineering report)?
Review the following engineering logs IAW NEN, COMDINST M9000.6
flexible joint log
flexible hose log
U. S. Coast Guard Boat Operations and Training Manual Volume ll.
Casualty Reporting Procedures (CASREP)
Civil Engineering Manual (CEM)
Cutter Training and Qualification Manaul
Directives, Publications, and Reports Index
Equipment Tag-out Procedures
Hazardous Waste Management Manual
Naval Engineering Computer Aided Design Standards
Naval Engineering Manual
NE-TIMS Stands for?
Standards for potable water
NAVMED COMINST 6240.1
Shipboard Helicopter Operations Procedure Manual
Supply and Policy Procedures Manual
What material is added to the exhaust valve heads, tips and stems to improve wearing qualities?
Lube oil filtering systems become inefficient @ temps below a minimum of?
Oxidation in lubrication is caused by?
High oil temps greater than 180^F
Lubeicating oil temps should be held as close as possible to?
What is the primary difference between mechanical and hydraulic governors?
Control lever actuation
What is the purpose of the drilled passages in the crankshaft?
To carry oil to the conrods
Setting the popping pressure to high on fuel nozzles will cause what?
Late injection timing
Too high an injection pressure causes what?
Late injection and high exhaust temperatures
What are the three ways to thread a blind hole?
Tapper, plug, and bottoming
When checking crankweb deflection on opposed piston engines, where should you take your readings?
You should only check the lower crank b/c deflection will also appear in the upper crank
What type of micrometer is used to check the thickness of a bearing shell?
A micrometer that is spracilly fitted with a spherical seat
Piston slap and excessive oil consumption in an engine is an indication of what?
Excessive piston to liner clearance
Should you replace or repair sodium filled intake and exhaust valves when they become damaged?
Repairs should not be attempted due to the sodium inside the valve. You may inspect and replace them only
Diesel combustion depends on what three primary needs?
Fuel, air, and compression
A diesel engine crankcase ventilation system is designed to do what?
Remove combustible gases from the crankcase
Lubricating systems for diesel engines are usually designed to initially provide l/o to the engine's?
Main bearings first
The color of the exhaust from an engine should be?
Scavenging in a four stroke/cycle diesel engine occurs during what?
The last part of the exhaust stroke and the first part of the intake stroke
What type of bearing is most widely used for main and connecting rod bearings of modern diesel engines?
In a diesel engine, the main bearings are used
Between the crankshaft and engine block
Crankweb deflection will give a positive reading of what?
Worn main bearing journals
What must be installed on internal combustion engines if its cylinder bore exceeds eight inches?
Explosion relief doors/valves
In a two stroke/cycle engine, the camshaft and crankshaft rotate @ ______ _______ speed?
In a four stroke/cycle engine the camshaft and crankshaft rotates @ _____ ____ ______ of the crankshaft?
Half the speed
A restricted air intake to a diesel engine may result in what?
The engine may not reach its rated speed
The operating efficiency of a salt water cooled engine will decrease unless the coolant discharge temp is kept between?
100 and 130^F
What causes deposits of salt in the coolers and piping of engines?
Excessive temps in the S/W cooling system
What is likely to cause a Failure of a diesel engine's mechanical governor?
Bound control linkage
If an engine shows power loss, frequent stalling, and starting failures, one of the constributing factors is likely to be?
Faulty operation of the governor
Pistons fitted w/semi-floating piston pins do not require what?
Bearings at the rod end
Trunk piston side thrust is absorbed by?
The cylinder wall
How does a stroke differ from an event?
A stroke signifies the piston motion between the limits of travel, while an event is an action which takes place during a stroke
What results from low L/O pressure to a piston?
Oxidation under the crown
A safety cover on a diesel engine differs from other access doors how?
It is fitted with a spring loaded pressure plate for relief during crankcase explosions
The seven basic readings required for DEMPS are?
Intake manifold psi
Exhaust back psi
The engine perameters that are to be plotted on graph paper for analysis are:
Inlet air pressure
A thorough inspection should always be made when replacing broken or burned valves in an engine to determine?
The condition of the valve guides
On a diesel engine, the cam followers are raised by the?
The cooling systems of engines using inhibitors should be checked?
When excessive chromate content is indicated in a diesel's cooling system, what should be done?
Nothing b/c its not a harmful condition
What are three things you could do to prevent corrosion in a heat exchanger?
Use j/w treatment
Vent the heat exchanger
What is the best method for checking for cracks in a connecting rod?
What is the best method for checking for cracks in a wet-type cylinder liner?
Where is the most likely place that a cylinder head would crank
Between the valve and injector holes
Before any adjustments are made to correct an unbalanced engine, it must first be?
Determined that the engine is in proper mechanical condition
When r/w heat exchangers are plugged and are still under the allowable limit, when should they be replaced?
The next available yard period
Excessive firing pressure in an internal combustion engine will likely cause what?
Damaged injector tips
An injection nozzle that is not in good working order will make what kind of noise?
A sharp intermittent noise called chatter
What is the most likely cause of a crankcase explosion?
A cracked piston
The only positive way to determine that a cylinder head gasket is leaking internally is by?
Removing the cylinder head
Cracking of the lands of a piston may result if?
There is insufficient ring groove clearance
After you have properly installed a new set of piston rings, and the top compression ring breaks after running the engine for the first time, what is the most likely cause?
The cylinder ridge wasn't removed during rebuild
A bright spot found on each end of a broken ring indicates?
Insufficient gap clearance
Cracked connecting rods are usually caused by what?
Overloading the engine
Bent connecting rods will most likely cause what?
Uneven wear of the piston pin and bushing
What indicates overtorqued connecting rod bolts?
What will low oil in the govenor cause?
The engine will not start
If the end play on a hydraulic govenor is too excessive, what will be the symptom?
In a recently overhauled engine, high L/O consumption may be cause by?
Piston rings not being seated
Which symptom would indicate that a cylinder liner is scored?
Low firing pressure
You must wait _____ minutes after securing an engine to open the access cover after experiencing a crankcase explosion.
A clogged injector tip would most likely cause what?
A distorted spray pattern
Low cooling water temps may cause what?
Excessive or abnormal wear of cylinders
If a piston crown gets damaged, what should you check for?
A warped cylinder head
What is a cause of excessive f/o consumption in a gasoline engine?
Float level too high
Black smoke from an engine would be an indication of what?
Restricted air supply/overload
White smoke shortly after getting u/w indicates what?
The engine isn't warm enough for the load
Heavy, dense smoke from an engine indicates what?
Dirty, amber smoke from an engine indicates what?
Fuel system problems
White smoke from an engine while u/w indicates what?
Cooling water leaking into the combustion chamber
Blue hazy smoke from an engine indicates what?
L/O leaking into combustion space
A drop in exhaust temperature and firing pressure (only) would indicate?
A problem with the f/o system
What is an indication that a cold running engine is running normal upon initial start-up?
The exhaust smoke and l/o pressure
A spark plug fouled with soft, fluffy, dry black carbon deposits generally indicate?
A rich fuel-air mixture
What will cause only the lower half of the main bearings to fail
Overloading of the engine
Pre-ignition in a gasoline engine can be cured by?
Using a colder plug
floating intake or exhaust valve at high speed indicate what?
Weak valve springs
You have a diesel engine that turns over but will not start, what is most likely the cause?
Low governor oil level
Unusual hull, or propeller shaft vibrations can be caused by?
Excessive engine speed in shallow water
To avoid warping a cylinder head, you loosen bolts using a ?
Reversed torque pattern
When installing a cylinder liner you must prevent from?
Cutting the o-ring
What is the most likely cause of f/o dilution?
Worn cylinder liners
What is the most commonly used cooling system in the Coast Guard?
Hydraulic governors hunt and surge when the ______ is out of adjustment.
What is the most common cause of burnt exhaust valves?
Particles of carbon on the valve seat
When should you replace a valve spring according to its lenght?
When it is more than 3% shorter than the new one
What would be evident if you have severe bearing failure in a large diesel engine?
Smoke and/or pounding noises
What may cause a metallic clicking noise in a running diesel engine?
Broken valve springs
Incorrect timing of a diesel engine's intake and exhaust valves will cause what?
Low compression readings
If you can not crank an engine, but you can bar it over by hand, where is the problem (most likely)?
In the starting system
Before installing new oil seals, what should be done first?
Soak them in a light L/O
What instrument is used to measure the rate of air flow?
What is the purpose of a vibration dampner?
To absorb crankshaft torsional vibrations
Carbon dioxide cylinders must be recharged when the cylinder charge weight is less than what percentage of the stamped full weight?
A graphite additive type grease is best suited for?
High temperature applications
A pyrometer is capable of producing a voltage by?
Heating a junction of two dissimilar metals
When one belt of a multiple v-belt drive requires replacing, it is necessary to:
Replace the entire set
Soldering flux aids the soldering process by:
How many times do you stencil piping that passes through a manned space?
Twice in each space
What is the most common type of flare used on tubing
When stenciling a pipe with an outside diameter of four inches, what size should the letters be?
2 inches high
Before using a torque wrench, you should check
The calibration date
All log entries in the machinery log and the bell book shall be checked by
The engineer of the watch
The engineering casualty control mission is designed for
Why are air compressors stages smaller after each stroke?
To compensate for volumetric decrease in air
The two most prefered methods of flushing piping systems are:
At what spacing are hose and tubing supports placed
Where would you find the tensile strength requirement for helo tie down points on a 378?
The air capable ships' facilities bulletin
When feeling a pipe or surface for temp, if you can hold your hand on the surface, it is probably below what temp?
On a blueprint, what type of symbol or identifier is placed adjacent to all revised areas except where the entire sheet has been added by revision?
A triangle revision symbol
Master drawings shall be stamped in?
Drawings that are Coast Guard standard drawings that apply to more than one cutter class are called?
Any formal change to a master drawing must be documented by a?
Master drawings and tech pub drawings are what type?
Naval engineering drawings
How do you set up negative ventilation on a main space fire?
Exhaust on high, supply on low
What do micro-organisms do in diesel fuel?
Promote chemical attack on metal as well as create water as by-product
What should be done prior to stowinga micrometer?
lightly wipe it with oil
When a valve spring breaks, it may collapse sufficiently to allow what to happen?
The valve to drop into the cylinder
You are inspecting the piston rings taken from an engine. What characteristics would tell you the rings are operating efficiently.
Shiney face and bottom
black or dull and top
A small quanitity of oil is added to the cylinder that has had a low compression reading. A second test shows normal compression, what is indicated by this test?
How long should full power trials last?
At least 2 hours
What is the function of the flywheel on an engine?
Stabilizes the crankshaft speed
When does piston slap occur?
Just after TDC or BDC
What connects the N3 gear box to the N3 governor?
Flexible drive cable
Stalling of the FT4A gas turbine would most likely be caused by what
Interrupted air supply
When wire tying a close group of bolts on a turbine, you should use what method?
Single strand/ single twist
When on a cutter with multiple turbine rooms, how often should they be checked?
How often are hot section inspections done, and what must first be completed before the inspection?
Every two years and a water wash must first be completed.
What is the purpose of the plenum chamiber
Increases internal pressure
How often is a bore scope inspection done on a gas turbine?
Combustion chamber on a FT4A/GE gas turbine has perforated walls for what reason?
To admit cooling air into the cans
In the can annular combustion chambers, the chamber are ignited how?
By the use of an igniter plug and flame cross over tubes
What type of anti-seize can be used on the hot section bolts of a gas turbine
Felpro C-200 anti seize compound
Of the 21,500 SHP available from the FT4A gas generator, Coast Guard ships are designed only to use?
Of all the air consumed by the gas generator, the combustion process uses only about?
The annular type combustion chamber has _____ chamber(s)?
In a gas turbine engine about ________% of air intake is used for cooling?
What converts the energy into useful work in a gas turbine?
The free turbine (power turbine)
What moves the free turbine on the FT4A gas turbine?
Exhaust gases from the compressor turbine
The maximum free turbine speed is?
The free turbine exhaust strut case is supported at the three a nine o'clock positions by?
Adjustable pinned mounts and with vertical adjustment at the 6 o'clock position
The proper sequence for lighting off a gas turbine generator is
A gas turbine generator log is a miantenance record furnished by
The gas turbine manufacturer
On the FT4A gas turbine, you should disassemble and inspect the clutch discs after?
A "C" on the head of a bolt indicates what?
What is the only major inspection done by Coast Guard personnel on a gas turbine?
A hot section inspection
The anit-icing air in a gas turbine generator come out of the nose cone through _____ holes.
How many independent rotor systems are employed in the basic gas turbine generator?
The gas turbine generator consists of five major sections:
Silicon controlled rectifier
Push button normally open switch
Double pole single throw switch
Multi position switch
Push button two position switch
A C power supply