M1 Test Info

Question 1

Propellers can have either a ______-pitch or _________-pitch

Answer 1

fixed-pitch or controllable-pitch

Question 2

Two types of propeller construction are…..

Answer 2

solid or built up

Question 3

If the blades are part of the hub or bolted to
the hub, the propeller is a ____ pitch.

Answer 3

fixed pitch

Question 4

Propellers that can adjust the pitch of their blades during operation have a _______ pitch.

Answer 4

Controllable Pitch

Question 5

______ is when a vacuum forms around propeller causing water to boil

Answer 5

Cavitation

Question 6

Rudder blades entirely aft of the rudder stock and is not commonly used.

Answer 6

Unbalanced rudders

Question 7

Is distributed equally forward and aft of the rudderstock over the entire width of the rudder.

Answer 7

Balanced rudder

Question 8

This rudder is the best of all rudder types, good turning radius, used by Navy

Answer 8

Semi-balanced rudders

Question 9

Vertical movement caused by the exchange of force between the ship’s weight and the force of buoyancy (z-axis). This is the worst of the translational motions, affecting the ability of the crew to function.

Answer 9

Heave

Question 10

Two General Motions of movement for ships.

Answer 10

Translational and Rotational Motions

Question 11

Lateral (sideways) movement in the athwart ships (y-axis) direction that alternates to port and starboard.

Answer 11

Sway

Question 12

Primarily forward movement in the longitudinal direction (x-axis) that momentarily increases the ship’s forward velocity.

Answer 12

Surge

Question 13

Rotational movement athwartships about the longitudinal (x-axis). This is the worst of the rotational motions in terms of affecting the crew.

Answer 13

Roll

Question 14

Longitudinal rotation about the transverse (y-axis)

Answer 14

Pitch

Question 15

Lateral rotation about the vertical (z-axis)

Answer 15

Yaw

Question 16

Motion Control Devices

Answer 16

Bilge keel
Fin Stabilizers
Anti-rolling tanks

Question 17

*Long, longitudinal fin fitted at the turn of the bilge to reduce rolling.
*They are used on almost all ships.

Answer 17

Bilge keel

Question 18

Horizontal, rudder-type fins installed on the stern of submarines for vertical control.

Answer 18

Fin Stabilizers

Question 19

The increase in the speed of the fluid occurs simultaneously with a decrease in the static pressure

Answer 19

Bernoulli’s Pinciple

Question 20

For every action there is an equal and opposite reaction

Answer 20

Newton’s third law of motion

Question 21

Reasons cavitation is bad….

Answer 21

Underwater noise
propeller blade erosion
propeller blade vibration
lower propeller efficiency

Question 22

3 types of translation motion

Answer 22

surge(x-axis)
sway(y-axis)
heave(z-azis

Question 23

3 types of Rotational Motion

Answer 23

roll(x-axis)
pitch(y-axis)
yaw(z-axis

Question 24

energy transfer that requires physical contact

Answer 24

Conduction

Question 25

3 modes of thermal energy transfer

Answer 25

conduction
convection
radiation

Question 26

energy transfer without physical contact

Answer 26

radiation

Question 27

method of transporting fluid

Answer 27

Convection

Question 28

3 energy classifications

Answer 28

mechanical
thermal
chemical

Question 29

1st law of thermodynamics:

Answer 29

energy neither created nor destroyed, only transformed

Question 30

4 types of Thermodynamic Cycles

Answer 30

Opened / Closed
Heated / Unheated

Question 31

In ______ thermodycamic cycle the working substance is taken in, used, discarded

Answer 31

Open

Question 32

In ______ thermodycamic cycle the working substance is recycled within the system

Answer 32

Closed

Question 33

In ______ thermodycamic cycle heat is added where work takes place

Answer 33

Heated

Question 34

In ______ thermodycamic cycle heat is away from where work takes place

Answer 34

Unheated

Question 35

Example of Open thermodycamic cycle

Answer 35

Exhaust

Question 36

Example of Close thermodycamic cycle

Answer 36

Nuclear

Question 37

Example of Heated thermodycamic cycle

Answer 37

Piston

Question 38

Example of Unheated thermodycamic cycle

Answer 38

Steam Plant

Question 39

This causes an increase in the velocity of the water and a decrease in the pressure of the water (Bernoulli effect)

Answer 39

Shallow Water

Question 40

Answer 40

Unbalanced

Question 41

Answer 41

Balanced

Question 42

Answer 42

Semi-Balanced