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MK1 > Propulsion > Flashcards

Propulsion Flashcards

1
Q

A ______ traveling in one direction constitutes a stroke.

A

Piston

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2
Q

The major difference between a two stroke and four stroke engine is the method through which they take in the _____ _____ mixture and exhaust the spent gases.

A

fuel/air

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3
Q

In a two stroke engine, _______ gases exit the cylinder through a hole in the cylinder wall.

A

exhaust

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4
Q

In a two stroke engine, the ________ stroke of the piston pressurizes the air in the crankcase.

A

downward

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5
Q

A _______ driven diaphragm fuel pump is typically found on a 4 stroke outboard engine.

A

mechanical

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6
Q

The increase in speed of the air flow through the narrow section of a ________ throat is known as the venturi effect.

A

carburetor

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7
Q

The purpose of the throttle body is to _______ air flow.

A

regulate

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8
Q

An Oil Injection outboard engine system uses a pump to draw oil from a ________.

A

reservoir

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9
Q

The Temperature Sensor provides the engine’s computer with temperature information for ______ and ignition optimization.

A

fuel

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10
Q

The Gear Case transmits ______ power to the propeller.

A

engine

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11
Q

In a jet drive system, the impeller is capable of pumping ______ _________ of water at relatively low pressures.

A

large volumes

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12
Q

The Starter Solenoid is a _______ operated, semi-automatic switch used to relay power from the battery to the starter motor.

A

remotely

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13
Q

A Magneto is generally used on smaller outboard engines to _______ electricity.

A

produce

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14
Q

The Voltage Regulator _______ of an outboard engine has the ability to turn on and off as needed to regulate the charging/electrical system.

A

Rectifier

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15
Q

Most Coast Guard installed outboard engines use an ignition system known as a __________ Discharge (CD) ignition whereby the system’s electricity is stored in a capacitor

A

Capacitor

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16
Q

Most outboard motor manufacturers recommend a gear case oil _______ _______ every 50 operational hours and oil replacement every 100 operational hours.

A

level check

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17
Q

Most outboard engine manufacturers recommend _______ _______ replacement once the engine reaches its first 100 hours.

A

spark plug

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18
Q

Most outboard manufacturers recommend that you replace the engine’s _______ pump at least semi-annually.

A

water

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19
Q

Fuel Injection occurs at or near the end of the ________ stroke and just before the power stroke.

A

compression

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20
Q

In a four stoke diesel engine, ________ ________ is used to describe the timeframe during which both the intake and exhaust valves are open.

A

Valve Overlap

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21
Q

In a two stroke diesel engine how many revolutions does the camshaft spin in relation to the crankshaft?

A

1:1

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22
Q

In the two-stroke diesel engine combustion process, the power stroke starts after the ______ passes near TDC.

A

piston

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23
Q

Diesel engines higher compression ratios are used to heat the air in the _______ to approximately 1000 degrees Fahrenheit (oF), this is this called Heat of Compression.

A

cylinder

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24
Q

The following are components of a _______: Crown, Skirt and Rings

A

piston

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25
Q

Blow-by can be best defined as Escaping _______ gasses past the rings into the crankcase.

A

compression

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26
Q

The connecting rod attached to the ________ by the connecting rod journal.

A

crankshaft

27
Q

Backlash is best described as the amount of space between the __________ of a gear tooth and the width of space between the matting gears.

A

thickness

28
Q

Friction bearings usually support the crankshaft, connecting rod, _________ and gear train.

A

camshaft

29
Q

Antifriction _________ are usually found in Cooling pumps, governors, starters, turbochargers and blowers. Mainly exterior areas of an engine.

A

Bearings

30
Q

The purpose of the flywheel is to ______ the energy during the power event and release it during the remaining events of the operation cycle.

A

store

31
Q

Terms that best describe the _______ of the camshaft are lift, duration, flank and nose.

A

construction

32
Q

Cam lobes are eccentric projections that change ______ motion of the camshaft to the reciprocating motion needed to operate the valves, injectors and other components.

A

rotary

33
Q

poppet valve is part of the actuating assembly that admits _____ air and discharges exhaust gases from the combustion space.

A

intake

34
Q

Valve guides prevent undesirable side-to-side movement of the_____ in the cylinder head.

A

valve

35
Q

A blower or supercharger is belt or _____ driven and provides instant boost pressure to the engine at all speeds.

A

gear

36
Q

In an open cooling system the engine is cooled directly by _______ .

A

seawater

37
Q

Harrison Plate Type of ______ _________ is used for oil only.

A

heat exchanger

38
Q

Plate Type heat exchanger uses a pack of __________ plates with portholes for the passage of two fluids on either side of the plate.

A

corrugated

39
Q

Magnesium anode can NEVER be used on _________ surfaces.

A

aluminum

40
Q

Electronic Control Unit (ECU) controls the fuel injection quantity and ______ in the common rail type electronic controlled fuel system.

A

timing

41
Q

Use a Plastigage to measure the _______ between a bearing journal and the bearing.

A

clearance

42
Q

Exhaust is harnessed to do work in gas ______.

A

turbines

43
Q

Annular and Can-Annular are the two types of _________ chambers/liners.

A

combustion

44
Q

The gas turbine base enclosure assembly’s inner walls are designed to withstand a flame of 2000 degrees for _____ minutes.

A

15

45
Q

Sinter Disc type of clutch discs has superb ______ dissipation and durability.

A

heat

46
Q

Spherical _____ type reduction gear bearings accept radial and/or axial loads and help maintain alignment.

A

roller

47
Q

Teflon shaft packing offers the ______ life.

A

longest

48
Q

A stave is a ________ strip within a cutlass bearing.

A

rubber

49
Q

Low operational temperatures are desirable and 230-dgrees Fahrenheit has been established as the _______ limit for general bearing applications.

A

maximum

50
Q

The two common types of _______ agents affecting bearing alloys are electrolytes and organic acids.

A

corrosive

51
Q

Packless Sealing System (PSS) used aboard the _______

A

47-foot motor life boats (MLBs).

52
Q

Secure the propeller and ______ _______ against uncontrolled rotation when checking or working on open marine gears.

A

shaft line

53
Q

The primary seal on a MX9 Stern Tube Seal is ________ face type of seal.

A

mechanical

54
Q

Line Shaft bearings may also be known as ________ bearings.

A

spring

55
Q

The governor _________ speed by regulating the amount of fuel supplied to the engine.

A

controls

56
Q

Bearing load is divided into three types; Radial, _______, and radial thrust.

A

thrust

57
Q

The hand can usually be held in contact with bearing surfaces _____ 131 °F.

A

below

58
Q

For all periods of inactivity, inspect the _____ _____seal for leakage once every 24 hours.

A

stern tube

59
Q

Jacket water _________ rise across an engine should not exceed 10 or 12 °F.

A

temperature

60
Q

Blue hazy smoke is most likely an indication of _____ presence in combustion chamber.

A

L/O

61
Q

When conducting _______ tests, the engine should be operated at 80 to 90% of the Coast Guard rated load.

A

performance

62
Q

When conducting engine performance tests, the _____ ______ and engine jacket water should be within 5 degrees of their normal operating temperature.

A

lube oil

63
Q

0.050” is the MAXIMUM allowable rudder ______ clearance for a 2” rudder shaft.

A

bearing

MK1 (11 decks)

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