Propulsion

Question 1

Where do you measure plastiguage

Answer 1

Widest part

Question 2

How many rotations of crankshaft for plastigauge to work

Answer 2

None

Question 3

What is happening if you have a fine mist coming oil of your red gear

Answer 3

Mist eliminator is full

Question 4

Main gear on a reduction gear is what type

Answer 4

Helical

Question 5

Radial shaft bearing prevents what

Answer 5

Radial bearings support the shaft

Question 6

Whipping of the bearing happens when?

Answer 6

Lack of oil, poor bearing contact, pinched bearing or insufficient clearance

Question 7

How long must ship be in water before taking shaft readings?

Answer 7

2 days minimum

Question 8

Cpp oil should be tested for water when?

Answer 8

Weekly

Question 9

What happens to a new stern tube bearing at low speeds?

Answer 9

Gripping

Question 10

Space of gear tooth of a red gear to the area in which it mates is called what?

Answer 10

Backlash

Question 11

Most likely cause of a crankcase explosion with no indicators is what?

Answer 11

A cracked or blown piston

Question 12

How is TIN measured in a spectrometeric oil analysis?

Answer 12

Ppm

Question 13

What does SSS clutch stand for?

Answer 13

Synchro self shifting

Question 14

what do you do about minor scratches or scores?

Answer 14

Grinding and lapping

Question 15

What supports rudder shaft?

Answer 15

Bearings

Question 16

What type of o-ring offers the very best in leakage control?

Answer 16

SAE flat face o-ring

Question 17

What do you grease when replacing a lower unit on 225 outboard?

Answer 17

Shift rod, shaft splines, and water tube seal

Question 18

Rudder stock is supported by what?

Answer 18

Bearings

Question 19

On larger diesel engines improper main bearing bore alignment may be found using what?

Answer 19

A crankshaft deflection gauge or by indications of wear in the main bearings

Question 20

What helps with instantaneous crankshaft load change?

Answer 20

Fly wheel

Question 21

Best o-ring for petroleum

Answer 21

Nitrile of fluorocarbon rubber

Question 22

How is a mechanical seal held in place?

Answer 22

Mechanical force

Question 23

What is a gland when it pertains to a sealing device ?

Answer 23

A cavity of a stuffing box, which surrounds and supports the sealing device

Question 24

What type of coolant is used for a keel cooler

Answer 24

Commercial anti-freeze

Question 25

What is a rudder attached to on a cutter

Answer 25

Rudder post

Question 26

Mist emitting from a reduction gear

Answer 26

Bad precipitator or mist eliminator

Question 27

Demps stands for what and what are the readings?

Answer 27

Diesel engine maintenance programs Cylinder compression pressure, cylinder firing pressure, cylinder exhaust pressure, crankcase vacuum, intake manifold pressure , and lube oil consumption

Question 28

What do chrome plated cylinder liner and rings need to better brake-in/seat?

Answer 28

They require higher cylinder pressures for successful ring seating

Question 29

Five sections of a turbine?

Answer 29

Compressor, combustion chamber, gas generator turbine, power/free turbine, and accesory drive

Question 30

Reduction gear oil change intervals?

Answer 30

1000 hrs for oil, 500 hrs for oil breather, and 100 hrs for output flange seals

Question 31

What is done by coating gear teeth with Prussian blue?

Answer 31

Spotting

Question 32

Satisfactory tooth bearing is what percentage of working space?

Answer 32

80%

Question 33

What temp is the hot oil flush on a newly overhauled engine?

Answer 33

175-190F

Question 34

What vibration dampener is the best at all speeds?

Answer 34

Viscous type dampener (Reduces stresses created throughout the whole speed range of the engine)

Question 35

You see small rubber pieces coming out the shaft seal this is caused by what?

Answer 35

Overheating

Question 36

Shaft bearings prevent what kind of play?

Answer 36

Side-side

Question 37

What type of cylinder does not have coolant flowing around it?

Answer 37

Dry cylinders

Question 38

At what point does the power stage start on a two stroke engine

Answer 38

After TDC

Question 39

How many turns on a crankshaft to complete a whole cycle on a 2 stroke?

Answer 39

1

Question 40

What is the main gear on ships shaft

Answer 40

Bull gear

Question 41

What is done to valve seats to make sure they seat properly

Answer 41

Grinding/lapping

Question 42

Most common contaminants piston rings face are dirt and ?

Answer 42

Water

Question 43

If you have a high exhaust temp on one cylinder but the rest are normal what is your problem?

Answer 43

Bad injector

Question 44

What type of filter lies between the pump and engine?

Answer 44

Full-flow

Question 45

Cutters equipped with jacking gear should have it in what position when not in use?

Answer 45

Disengaged

Question 46

All anti-friction bearings have what in common?

Answer 46

Rollers

Question 47

What temp increase of jacket water across a CAT engine?

Answer 47

10-12 degrees

Question 48

What position is the crankshaft in when you have a positive deflection reading?

Answer 48

Position 1

Question 49

Your ship must be what before taking shaft readings?

Answer 49

Waterborne for 2 days minimum

Question 50

What is the minimum crankshaft diameter required to perform web deflection?

Answer 50

4in

Question 51

After oil and filter change how many hrs minimum before sampling?

Answer 51

25hrs

Question 52

What happens when oil reacts with heat and air?

Answer 52

Oxidation

Question 53

Sodium intake valves and exhaust valves help with what?

Answer 53

Heat dissipation

Question 54

What is not a symptom of a failed bearing?

Answer 54

Oil leak

Question 55

What is the max play in RBM reversing bucket bushing?

Answer 55

None MPC says to replace if any play is found

Question 56

45 RBM how much oil in the bearing housing?

Answer 56

.48 gallons