ICE

Question 1

In a four stroke gas engine where is the fuel air mixed?

Answer 1

Carburetor

Question 2

The amount of fuel injected by a fuel system is determined by adjusting What?

Answer 2

fuel rack

Question 3

Min cetane for MTU and PAXMAN?

Answer 3

45

Question 4

In a 2 stroke how do exhaust gasses exit the cylinder?

Answer 4

through the cylinder wall

Question 5

Shaft taper %?

Answer 5

80%

Question 6

Keel coolers use what?

Answer 6

ANTIfreeze

Question 7

What size cutters are required to carry lube oil viscosity comparators?

Answer 7

All cutters and boats that use 9000 & 2104 series lubricating oil

Question 8

What does consistent lifting of a cylinder relief valve indicate?

Answer 8

Weakened spring, early fuel injection, faulty fuel injector

Question 9

How to treat small burrs on a piston pin?

Answer 9

Replace it. Under no circumstances are pins to be cleaned with sandpaper or emery cloth per NSTM 233.5.11

Question 10

what ensures oil is dispensed on oil bearing walls

Answer 10

oiler rings

Question 11

A thrust bearing supports what type of movement?

Answer 11

axial

Question 12

Engine sampling Jacket water

Answer 12

Monthly?

Question 13

When crank deflection readings all read +(plus) the crank is said to be?

Answer 13

Convex Upwards

Question 14

What type of engine has a wet type oil sump?

Answer 14

4 stroke

Question 15

If a full load is applied to an engine with new rings or liners what should happen?

Answer 15

too much load-galling pistons, scoring liners or piston seizure
To little- cylinder surface will glaze and wear, rings will cease

Question 16

Pistons rings are subjected to extreme heat, dirt, & marginal lubrication as well as_____?

Answer 16

Pressure loading

Question 17

How many compression strokes for on a 4 stroke engine?

Answer 17

4 strokes: Intake, compression, power, exhaust.
2 complete cycles/ revolutions
1 compression stoke

Question 18

What methods are used for checking piston rings?

Answer 18

visual inspection and operational parameters

Question 19

. 2 stroke how many revolutions

Answer 19

one

Question 20

The cutters in the CG fleet are equipped with what to aid in the engaging and disengaging of the power from the engines to the red gears

Answer 20

Hydraulic multi disc and overrunning clutches

Question 21

What are the two types of screw extractors?

Answer 21

straight flute and spiral taper

Question 22

Type of cyl liner that doesn’t come in contact with jw?

Answer 22

Cast

Question 23

After flushing an engine how long do you run the engine before your first viscosity test?

Answer 23

15 min

Question 24

What does the MPU-23 card exhibit what color lights when operating normally

Answer 24

Green yellow yellow

Question 25

Center section overhauls shall be done based on the ?

Answer 25

condition of the engine not solely based on engine hours

Question 26

If cylinder liners are to be reused, they should be inspected for wear, cracks, and _____ at each overhaul?

Answer 26

Corrosion

Question 27

What helps steady engine RPM’s after a sudden load change?

Answer 27

flywheel

Question 28

Defective pistons and excessive carboning of rings would indicate a problem with what?

Answer 28

Vacuum system

Question 29

What tool is used to measure journal bearings?

Answer 29

Micrometer Plastigauge

Question 30

CHP for an engine overhaul is what chapter in the NSTM

Answer 30

NSTM ch 233 diesel engine

Question 31

NALFLEET is ?

Answer 31

Used to prevent corrosion in engines with dissimilar metals

Question 32

What is a rudder stock supported by?

Answer 32

a bearing

Question 33

Stave bearing measurement how far do you go?

Answer 33

4-6 inches

Question 34

A rule-of-thumb used for deflection is ______ inch for each inch of engine stroke other than the last throw on the flywheel end?

Answer 34

0.0001

Question 35

in a diesel 4 stroke engine what is the term for the timeframe which both the exhaust and intake valves are open?

Answer 35

valve overlap

Question 36

Cylinder liners wear at the greatest rate in an area ____ degrees to the crank and in the direction of the piston thrust?

Answer 36

90 deg

Question 37

Crankcase explosions most likely caused by what?

Answer 37

cracked pistons

Question 38

When is the cutter engineering report due?

Answer 38

No later than Jan 31 unless at sea then report at next port

Question 39

When new rings are installed how should you measure the gap?

Answer 39

feeler gauge

Question 40

Corrosion resulting from loads applied by mounting bolts, in-service conditions, or even mfg processes?

Answer 40

Stress corrosion

Question 41

Pneumatic clutches

Answer 41

Eaton Airflex

Question 42

What occurs between the end of the compression cycle and the beginning of the power cycle in a diesel?

Answer 42

Fuel Injection

Question 43

how often are edge type disk strainers rotated

Answer 43

one complete revolution per hour

Question 44

Torsion couplers

Answer 44

Geisler and bvulker Reto S | Flexible couplers

Question 45

What causes oxidation in oil?

Answer 45

temperature rise

Question 46

What factors must be observed to determine if piston rings are setting in?

Answer 46

Crank PSI, exhaust color, compression & fire psi, & lube oil consumption

Question 47

In a propulsion plant the higher the gear ratio the ? the torque?

Answer 47

greater

Question 48

What supports shafting inside the skin of the ship?

Answer 48

Line shaft bearings

Question 49

What does the cage NOT do in roller bearings?

Answer 49

Help carry the load.

Question 50

How can a 2 stroke diesel engine be identified?

Answer 50

Cylinder ports

Question 51

How do you dress slight scoring on a crankshaft bearing surface?

Answer 51

oil stone

Question 52

On ICU if a full load is applied to quickly to an engine having new liners installed there is a risk of what?

Answer 52

Galling pistons, scoring liners, or even piston seizure

Question 53

Crankshaft question with a + sign for web deflection

Answer 53

Slowly turn crankshaft in the direction of rotation and stop when the crankshaft deflection is in the #2 position(inboards). Record any changes in pointer deflection as a + or -.. Closing of the web is a negative - value. Opening of the web is a positive value +.

Question 54

What size journal is included in the cutter engineering report?

Answer 54

4 inches or greater

Question 55

How many DEMP readings are required?

Answer 55

7

Question 56

on a 225 what is the spark plug gap and L/O pressure

Answer 56

.28-.23 23 PSI for L/o

Question 57

What chapter covers Jacket water?

Answer 57

233 NSTM Internal Combustion Engines

Question 58

Corrosion with tiny pin holes?

Answer 58

Pitting

Question 59

What tool is used to measure journals?

Answer 59

micrometer

Question 60

What is the allowable deviation from round and smooth shaft journals

Answer 60

Slight circumferential grooving is acceptable

Question 61

What do you do if the coolant nitrite level is below 100PPM

Answer 61

Add one gallon of NALCOOL for each 100 gal capacity

Question 62

What is a governor controlling the flow of oil to or from the power cylinder assy?

Answer 62

pivot valve

Question 63

How long may sea trials last to demonstrate proper operation of an overhauled engine?

Answer 63

4-6 hours

Question 64

What type of material; do we use for an o-ring?

Answer 64

nitrile and Buna s

Question 65

How far do you rotate the shaft when using plastigage?

Answer 65

Do not rotate the shaft

Question 66

what are the two types of bearings used on engines

Answer 66

anti friction and friction

Question 67

What do chunks of rubber from the shaft bearing mean?

Answer 67

overheating

Question 68

how do filters flow

Answer 68

outside to inside (reusable type)

Question 69

what ARE THE TWO TYPES OF PNEUMATIC CLUTCHES USED IN THE cg?

Answer 69

disc type and drum type

Question 70

How often do you take readings on a newly rebuilt engine?

Answer 70

15 min

Question 71

ODR readings and recorded data will be sent back to 87’s on what basis?

Answer 71

monthly

Question 72

When do you use FOP brake?

Answer 72

in emergencies only

Question 73

For the shaft rudder what is stick slip and how do you fix it?

Answer 73

Chattering or Squealing caused by the hydrodynamic water film not yet fully developed/ loosen staves

Question 74

What type of coupling utilizes oil dampened steel springs?

Answer 74

Torsion damping couplings

Question 75

Glass or plastic shaft cowling is inspected

Answer 75

every regularly scheduled dry dock

Question 76

what corrosion inhibitor is used on most 87s

Answer 76

glysacorr G93

Question 77

Corrosion that takes 6 months to surface?

Answer 77

Crevice

Question 78

. what connects the cam follower to the valve?

Answer 78

rocker arm

Question 79

What controls the engines fuel rack on a internal combustion engine?

Answer 79

the governor

Question 80

Diesel engine reading shall be taken every ___ min during break in.

Answer 80

15 min

Question 81

two inspections for a piston or cylinder]der liner?

Answer 81

visual inspection and operational parameters

Question 82

What device applies air pressure to the intake of an operating diesel engine?

Answer 82

Blower

Question 83

Who can perform calibration of diesel injectors

Answer 83

only qualified shops and facilities

Question 84

how much power does a turbo add to a naturally aspirated engine

Answer 84

50%

Question 85

How to clean a plate cooler?

Answer 85

Fiber brush, never steel or steel wool

Question 86

After freshly filling or treating coolant when do you check it?

Answer 86

24 hours Monthly in accordance with planned maintenance

Question 87

What causes low compression in the cylinders?

Answer 87

Poorly seated or worn rings

Question 88

CG filters

Answer 88

2types- disposable and reusable

Question 89

Chrome plated piston rings require ______ for successful seating in?

Answer 89

Higher cylinder PSI

Question 90

What do you need to properly seat a piston ring?

Answer 90

high cylinder pressure

Question 91

Suction strainer will usually be?

Answer 91

100 to 200 wire mesh

Question 92

What type of R/W system has to be closed in order to clean?

Answer 92

Simplex strainer

Question 93

What causes high oil consumption on a new engine?

Answer 93

Ring seat

Question 94

When a contractor finds heavy corrosion in a jw system they should descale with what?

Answer 94

Hydrochloric Acid

Question 95

What tools do you use to bearing shells?

Answer 95

Depth Micrometer

Question 96

Upon completion of an overhaul, the supervisor will ensure the completion is documented in what two reporting systems?

Answer 96

Next cutter engineering report, and CM plus

Question 97

What temp do you maintain an engine at during run-in to check bearings?

Answer 97

120 F

Question 98

What is the proper pressure drop across each piston ring?

Answer 98

½ the pressure above each ring

Question 99

JW sampling after treatment?

Answer 99

24 hours

Question 100

What are the three methods of connecting a piston to a conn rod?

Answer 100

Fixed, semi floating, and floating

Question 101

Chrome plated rings or liners require what for successful ring seating?

Answer 101

Higher cylinder pressures

Question 102

Demps doesn't read?

Answer 102

Intake Air temp

Question 103

What are the advantages of sodium filled valves?

Answer 103

Provides a more rapid heat transfer

Question 104

What are the two methods for cleaning the engine block and parts?

Answer 104

soaking and flushing Soaking is when an engine is dipped in an alkaline solution Flushing is hot clean oil flushed through entire system

Question 105

What do you do is the oil cooler on a CAT engine fails

Answer 105

replace oil cooler

Question 106

A drop in the exhaust temp and firing pressure only would indicate a problem with?

Answer 106

fuel system

Question 107

What removes/controls the amount of oil film on cylinder | walls

Answer 107

wiper rings

Question 108

Three basic purposes of piston rings?

Answer 108

Seal, heat transfer, lubricate

Question 109

How many compression strokes for on a 2 stroke engine?

Answer 109

2 strokes: suction, and exhaust or power | 1 complete cycle, 1 revolution

Question 110

What are the two basic rudder bearings used on small boats?

Answer 110

Stave and smooth

Question 111

What part of the governor positions the fuel rack of the engine?

Answer 111

servo motor

Question 112

Crankshaft counterweights will vary depending on what?

Answer 112

number of cylinders

Question 113

If chloride concentration exceeds 100 PPM

Answer 113

Dump the entire system

Question 114

Crankshaft counterweights are always found in ?

Answer 114

pairs