M15.1

Question 1

Weight is measured in?

Answer 1

Newton’s.

Question 2

What’s the equation to determine force?

Answer 2

Mass x acceleration

Question 3

Equation to determine weight?

Answer 3

Mass x acceleration due to gravity.

Question 4

Equation for work?

Answer 4

Force x distance.

Question 5

SI unit for work?

Answer 5

Joules, 1 joule=1Nm

Pg 3

Question 6

Equation for power?

Answer 6

Work/time

Question 7

SI unit for power

Answer 7

Watts, 1W = 1 Nm/s

Question 8

Mechanical energy can be divided into 2 types of energy?

Answer 8

Potential and kinetic.

Question 9

Potential energy is?

Answer 9

The energy a body has by virtue of its position.

Question 10

Potential energy (PE) = ?

Answer 10

PE = mgh

Pg 4

Question 11

Kinetic energy is?

Answer 11

The energy a body has by virtue of its motion.

Question 12

Kinetic energy (KE) can be expressed by what equation?

Answer 12

1/2 m (V squared)

Pg 4

Question 13

On impact kinetic energy turns into what 2 types of energy?

Answer 13

Sound and heat energy

Question 14

Newton’s first law is

Answer 14

The law of inertia, a body at rest remains at rest unless acted upon by an unbalanced external force.

Question 15

Newton’s second law is

Answer 15

The interplay between force and motion, and states that the acceleration produced in a mass by a force acting on it directly proportional to the force and inversely proportional to the mass

Question 16

Newton’s 3rd law is

Answer 16

The law of action and reaction and states that every action has an equal and opposite reaction.

Question 17

The gas turbine engine is essentially?

Answer 17

A heat engine using air as a working fluid to provide thrust.

Question 18

To accelerate the air passing through the engine, the engine must? (3)

Answer 18

Pressure energy increase
Addition of heat energy
Conversion from potential to kinetic energy in the form of a high velocity jet.

Question 19

4 areas of an engine?

Answer 19

Air inlet
Compressor
Combustion
Exhaust

Question 20

In a piston engine the cycles are ?

Answer 20

Intermittent.

Question 21

In a gas turbine the cycles are?

Answer 21

Continuous

Question 22

The process of increasing the airs volume without changing its pressure is called?

Answer 22

Heating at constant pressure or isobaric heating.

Question 23

The aircrafts engines ,aim jobs are to? (4)

Answer 23

Create the necessary thrust for movement
Hydraulic power
Electrical power
Bleed air

Question 24

2 types of aircraft engine

Answer 24

Gas turbine and piston engine

Question 25

Advantages (1) and disadvantages of a piston engine (2)

Answer 25

Adv - good fuel efficiency

Dis Adv - high weight to power ratio and performance loss at altitude.

Question 26

4 types of gas turbine engine are

Answer 26

Turbo-pop
Turbo-shaft
Turbo-jet
Turbo-fan

Question 27

An engine which uses jet propulsion is called a ?

Answer 27

Reaction engine.