Unit 1

Question 0

Newtons first law of motion is also considered the definition of what term?

Answer 0

Inertia

Question 1

What does Newtons first law of motion state?

Answer 1

A body at rest remains at rest and a body in motion continues to move at a constant speed in a straight-line, unless an external force act upon

Question 2

What is Newtons second law of motion?

Answer 2

An unbalanced force on a body produces or tends to produce acceleration in the direction of the force and that the acceleration, if any, is directly proportional to the force and inversely proportional to the mass of the body

Question 3

Which of Newton’s laws best explains why a jet engine produces forward thrust?

Answer 3

Newtons third law

Question 4

What two words can best sum up Newtons third law of motion?

Answer 4

Action and reaction

Question 5

What does Bernoulli’s principal state?

Answer 5

When the speed of a stream of gas increases, the pressure of the gas decreases, and when the speed of the gas decreases, the pressure increases

Question 6

What type of duct is used to decrease pressure and increased velocity?

Answer 6

Convergent duct

Question 7

How does the design of an airfoil influence pressure above and below the airfoil to produce lift?

Answer 7

The wing or airfoil of an aircraft is designed to increase the velocity of the airflow above its surface; thereby decreasing pressure above the airfoil. Simultaneously, the impact of the air on the lower surface of the airfoil increases the pressure below. This combination of pressure decrease above the airfoil and pressure increase below the airfoil produces lift

Question 8

What is defined as the ability to do work?

Answer 8

energy

Question 9

A force moves an object

Answer 9

Work

Question 10

The tendency of an object to maintain its direction and speed

Answer 10

Inertia

Question 11

Sometimes thought of as physical effort

Answer 11

Work

Question 12

Commonly expressed as the British thermal unit

Answer 12

Heat

Question 13

Reduced by using lubricants

Answer 13

Friction

Question 14

Equals force times distance

Answer 14

Work

Question 15

Kinetic and potential

Answer 15

Energy

Question 16

The rate of doing work

Answer 16

Power

Question 17

A type of energy that results from molecular motion

Answer 17

Heat

Question 18

What type of energy does a falling object possess?

Answer 18

Kinetic

Question 19

How does one form of energy become a different form?

Answer 19

When an object is in motion, it has Kinetic Energy; however, as it moves to a stable position from which force must be exerted to make it move to another position, is said to have potential energy

Question 20

Which jet engine section produces the large volumes of air required for the production of thrust?

Answer 20

The compressor

Question 21

What does the combustion section do to support the production of trust?

Answer 21

Introduces fuel and burns it in the airstream behind the compressor. Burning the fuel increases the air temperature and expands the air

Question 22

Which engine section drives the compressor?

Answer 22

The turbine

Question 23

What is the energy that is expanded through the exhaust nozzle used for?

Answer 23

It propels the aircraft forward

Question 24

What is used to create the propulsive force for a turboprop engine?

Answer 24

The propeller

Question 25

Which terms are used to express the thrust produced by a T56 engine?

Answer 25

Horsepower and pounds of torque

Question 26

Which term is used to define theoretical power of a frictionless engine?

Answer 26

Indicated horsepower

Question 27

What is frictionless horsepower?

Answer 27

Indicated horsepower minus brake horsepower. It is used by an engine in overcoming the friction of moving parts, drawing in fuel, expanding exhaust, driving Oil and fuel pumps, and the like

Question 28

Which type of horsepower determines the performance of the engine-propeller combination?

Answer 28

Equivalent shaft horsepower also known as thrust horsepower

Question 29

What can you determine if you know the BTU content of a gallon of fuel want and how much the gallon of fuel weighs?

Answer 29

The potential horsepower of fuel

Question 30

What type of fuel do today's jet engines use?

Answer 30

A kerosene/gasoline hybrid called JP-8

Question 31

Describe the thermal efficiency equation of a jet engine

Answer 31

Energy produced by an engine, divided by the energy of the fuel that is consumed by the engine

Question 32

What two factors determine what proportion of the energy of the fuel is actually used to propel an aircraft forward?

Answer 32

Thermal and propulsive efficiency

Question 33

Define the term "barometric pressure"

Answer 33

The force being exerted by the mass of a column of air above the point where the pressure is being measured

Question 34

What instrument is used to measure barometric pressure?

Answer 34

A barometer

Question 35

Why is a measurement of 14.7 psi sometimes referred to as a "standard day" atmospheric condition?

Answer 35

Because it's a Mercury: one square inch by 29.92 inch high were weighed it would weigh 14.7 pounds

Question 36

Why was a US standard day condition developed?

Answer 36

Because some standard was necessary as a reference point for calculating and communicating factors governing air density

Question 37

What two factors tend to cause variations in the temperature of the atmosphere?

Answer 37

Altitude and latitude

Question 38

Define the term density, as it applies to air

Answer 38

Material mass per unit volume

Question 39

List three methods by which heat can be transferred

Answer 39

Conduction, convection, and radiation

Question 40

Where's the point of highest pressure within a jet engine?

Answer 40

The diffuser section because of its divergent design

Question 41

On a jet engine that does not have an afterburner where's the point of highest temperature?

Answer 41

The combustion section

Question 42

When a jet engine reaches idle speed, what determines how the fuel control regulates engine speed?

Answer 42

The power lever setting

Question 43

What two forms of energy does a jet engine produce?

Answer 43

Thrust and heat

Question 44

Approximately what percentage of the energy produced by the fuel is needed to maintain the jet engine operating cycle?

Answer 44

60%

Question 45

Why does the airflow velocity of the exhaust gases increase within the turbine stator?

Answer 45

The convergent design of the turbine stator

Question 46

What component directs the gases that strike the turbine wheel blades?

Answer 46

Turbine stator

Question 47

Where is the point of highest velocity in a jet engine?

Answer 47

At the ejector nozzle

Question 48

What is the purpose of the turbine stator?

Answer 48

To increase the velocity of the gas that hits the turbine blades by means of airfoil shaped Vanes

Question 49

After the gases leave The turbine section what two types of velocity do they have?

Answer 49

Axial and tangential

Question 50

After the gases leave the turbine section and enter the exhaust section, what velocity do they possess?

Answer 50

Axial

Question 51

What straightens the flowpath of gases in the exhaust case?

Answer 51

The vanes in the exhaust case

Question 52

In a multistage turbine, what is the arrangement of the shafts?

Answer 52

One shaft is hollow, permitting the other shaft to operate inside of it

Question 53

Which turbine drives the front compressor on the dual spool engine?

Answer 53

The rear turbine