ASTB ANIT/mechanical Study Guide

What does 5 whistle blasts mean?

Danger signal used when the other vessel's intentions are not understood or its indicated course is dangerous

Best known dive bomber in WWII used by USN?

Dauntless

How are runways labeled?

First 2 numbers in their compass heading (runway 36 is north, not 00).

MA of Multiple Lines defined by

Force = (Efficiency x Weight) / Number of Ropes) F = eW/n

MA of Multiple Pulleys Defined by

Force = Work / 2 F = W/2

Third Class Lever Formula

Force x Length of 1 = Length of 1 + Length of Two F = (L1 + L2) / L1

MA of First Class Lever Formula

Force x Length of 1 = Resistance x Length of 2 F = R x (L2 / L1)

MA of Second Class Lever Formul

Force x Length of 2 = Length of 1 + Length of Two F = (L1 + L2) / L2

What is the purpose and location of ailerons on a plane

Form part of the trailing edge of each wing, used in pairs to control the aircraft in roll

Rate of heat exchange is faster through objects with

Greater heat difference

What aircraft entered service just before Midway and was a torpedo bomber?

Grumman TBF Avenger?

What aircraft was a high performance piston driven fighter?

Hawker sea fury or Grumman f8f

According to Bernoulli's principle, a jet flying faster will have (higher or lower) lift on its wings?

Higher

What happens when you drop a bullet and fire one from a straight and level gun?

Hit ground at same time

Heat always travels from _____ to ____

Hot object, Cold Object

If two barrels are filled with the same liquid at different temperatures, which one will float higher?

If submerged into liquid, the lower temperature liquid would float higher

What happens when you remove/insert control rods in a nuclear reactor

Increase/decrease the reactivity of the reactor (increase/decrease the neutron flux) therefore, This In turn affects the thermal power of the reactor, the amount of steam produced, and the electricity generated

If an ice-skater is spinning and tucks her arms in, will angular velocity increase of decrease?

Increases as she reduces her moment of inertia

Does it take more, less or the same amount of force to push an object up an incline vs. on a flat area?

It takes more force to push an object up an incline

What happens when you kick a football in its center of gravity?

It wont tumble or roll in the air

What is an F9F Panther?

Jet

What is the name and the purpose of the flaps that come out of the deck of an aircraft carrier that sit directly behind the jet engines when the jets take off from the carrier?

Jet blast deflector

What is a CVBG?

Large Carrier Battle Group

Who is the person who tested the nose wheel hook on the A-6 in 1960

Lawrence Meade Jr.

MA of a Ramp

Load = Length / Height

MA of Wedge Defined by

Load = Weight x Height F = W x H

MA of Vise Defined by

MA = (2 x 3.14 x Length of Handle ) / Pitch of Thread

Mechanical Advantage Defined by

MA = Output force / Input Force

MA of Pistons Defined by

MA = a^2 x d^2 = a1 x d1 Where a = area, d = displacement

What does the tachometer measure?

Measures working speed of an engine (usually in RPM)

What does the prefix "MH" mean in MH-60S?

Multi-mission, helicopter

What is the minimum required load factor by the FAA?

Normal 3.8 to -1.52

Which aircraft first escorted bombers into enemy territory?

P-38 Lightning

What plane served as a bomber escort in WWII

P-51 Mustang

What plane was the first to escort bombers DEEP into enemy territory?

P-51 Mustang

What is the highest deck of a ship

Poop Deck

Circuit Power Defined by

Power = Volts x Amperes

What is aspect ratio?

Ratio of the distance between the wing tips of an airplane to its average wing width

If the flywheel of a space probe turns clockwise does the rest of the probe turn the same direction, not at all, or the opposite direction?

Reaction wheel - opposite direction / Momentum wheel - no movement

Two airplanes head on yield which way?

Right

Acceleration of a rock compared to dropping or throwing the rock down a well

Rock thrown down has higher acceleration and will hit first.

What plane was converted to a tanker during operation Iraqi Freedom?

S-3 Viking

What plane was converted to an air tanker during Desert Storm?

S-3 Viking

What was the first "heavy carrier based bomber?"

Sky Warrior

What happens to temperature during an isothermal expansion?

Stays the same.

What is another name for a rudder on the ship

Steering oar

What is TACAN?

Tactical air navigation systemProvides the user with bearing and distance (slant-range)to a ground or ship-borne station

Does buoyancy depend on temperature?

Temperature affects density - so yes

A pot of water is boiling on the stove, and the temperature of the burner is increased, what happens to the temperature of the water?

The temperature of the water will increase as well due to conduction and The water is in contact with the pot which is in physical contact with the burner that transfers heat to it

Define Heat Conduction

The transfer of heat from the contact of one object to another (the stove to the pot)

Define Heat Convection

The transfer of heat through the movement of fluids (the water inside a pot)

How does ice on the wing effect aircraft performance?

The weight of the aircraft will increase while the ability to generate lift will decrease

What is the purpose of a helicopter's tail rotor?

To counter torque produced by the main rotor

Why are propellers curved on 1 side and flat on the other?

To produce thrust?

The nickname "Old Ironsides" was given to which ship?

USS Constitution

The air pressure on bottom of a wing is higher and has this impact on the wing

Upward lift

Water in a nuclear power plant is used for what?

Used as the working fluid in the process which drives the operation

What airframe has tilt rotor capability?

V-22 Osprey

What is the voltage across 30 ohm at 0.25 amps?

V= current x resistance 7.5 volts

Control about what axis is actuated with X surface?

Vertical axis - From the top to bottom of the fuselage and through the center of gravityLateral axis - From wing tip to wing tip and through the center of gravityLongitudinal axis - From front to back of the fuselage and through the center of gravity

In what war did the EA-6B make its first appearance?

Vietnam War

______ is constant in parallel and ______ is not

Voltage, current

What war did the longest dog fight in history occur in?

WWII

Who does the commander of an air squadron report to?

Wing Commander

Which aircraft broke the sound barrier first?

XS-1

The buoyancy of an inflated ball increases as

You go deeper

What is the change in acceleration for a constant force on a horizontal plane with negligible friction?

change in acceleration is zero if force is constant. F = mass x Acceleration. so if acceleration changes so does force.

The air pressure on top of a wing is lower because of ___________ speed of the air

increased

Air is flowing over a wing which direction is force exerted?

it produces lift. a force in positive y direction

Bernoulli's principle states that low velocity over a wing means?

less lift

What is the value of acceleration due to gravity?

9.8m/s^2

What is a "bulkhead"

A dividing wall or barrier between compartments in a ship, aircraft, or other vehicle

First Class Lever Defined

A lever with a fulcrum positioned between the effort and the load (see-saws, balance scales)

MA of Third Class Lever Defined

A lever with the effort positioned between the fulcrum and the load (human arm)

Second Class Lever Defined

A lever with the load positioned between the fulcrum and the effort (wheel barrow)

What aircraft is designed to strike ground targets?

A-10 Lightning "Warthog"

What aircraft is suited for ground attack?

A-10 Lightning "Warthog"

A B C D E F G H

A: Bow B: Stern C: Port D: Starboard E: Stem F: Transom G: Gunwale H: Thwart

A: B: C: D: E: F: G: H: I: J: K: L:

A: Canard B: Fuselage C: Cockpit D: Wings E: Ailerons F: Flaps G: Vertical Stabilizer H: Elevator I: Horizontal Stabilizer J: Winglets/Wing tips K: Rudder L: Trim Tabs

What is the designation for a Side Winder Missile?

AIM-9

What is dissimilar lift?

An uneven amount of lift on opposite sides of the rotor disc.

What airplane was the main torpedo bomber used in WWII that flew for the Navy for 15 years?

Avenger

Strategic Air Commands frontline bomber in the 1950s?

B-36

What was the primary SAC nuclear bomber in 1950?

B-36 Peacemaker

B: A:

B: Longitude A: Latitude

In what battle was the Japanese super battleship Musashi sunk?

Battle of Leyte Gulf

What are the vertical sections of a ship called?

Bulkheads

Who broke the sound barrier?

Chuck Yaeger

What are high altitude fluffy clouds?

Cirrocumulus?

What is the island called on an aircraft carrier?

Command CenterLocation of air-traffic control and the bridge

What happens to the heat/cold when your hand touches a street pole?

Conduction: Heat transfers from the hotter object to the colder until both are "equal"

______ is constant in series and ______ is not

Current, voltage

How do you "lean" the aircraft?

"Lean" to the side (roll) - ailerons"Lean" to the front (pitch) - elevator

Mechanical Advantage of Gears

# of Teeth First Gear / # of Teeth Secondary Gear

A load hangs from two strands of springs, two springs on each strand. What is the load on one spring?

.5 of the total load on the entire system

How many times per second does an AC current of 60Hz change direction

120 times to complete 60 cycles

How many Apollo missions total were there?

17, 6 went to moon, 12 manned

Ship bell/blast meanings

1: intention to direct course of vessel to own starboard 2: intention to direct course of vessel to own port 3: indicates that the vessel's engines are going astern 5: danger signal Prolonged blast (4-5 sec): indicates restricted visibility