Mod 13

Question 1

What does GWP stand for?

Answer 1

Global warning potential

Question 2

What PPE do we need to wear for air con?

Answer 2

Protective goggles, gloves made fron fluoroelastomer, long sleeves, and long trousers

Question 3

What does MAC stand for, and when was it introduced?

Answer 3

Mobile air conditioning, 4th July 2010

Question 4

What is heat measured in?

Answer 4

Joules

Question 5

What is the boiling point of R134a?

Answer 5

-26.3oc at normal atmospheric pressure

Question 6

What are the characteristics of R134a?

Answer 6

Odourless, non-toxic, non explosive

Question 7

What is the global warming potential of CO2?

Answer 7

1

Question 8

What is the GWP of R1234yf

Answer 8

4

Question 9

What are the characteristics of R1234yf

Answer 9

Not compatible with R134a systems, slightly flammable, requires different equipment to service, different size parts than R134a

Question 10

What is the boiling point of R1234yf?

Answer 10

-30

Question 11

What does MAC say is the maximum GWP we are allowed?

Answer 11

150

Question 12

What is the leakage rate of 150 GWP

Answer 12

40 grams

Question 13

What is the gwp of 134a?

Answer 13

1300

Question 14

What are the three natural laws of physics used to provide a functioning AC?

Answer 14

Heat=temperature=pressure

Question 15

What are the three heat transfers?

Answer 15

Conduction (e.g, physical contact - touching a hot surface)
Convention (e.g, air movement - feeling warmth from a fan heater)
Radiation (e.g, solar rays - heat from the sun)

Question 16

How does heat and temperature change the refrigerants?

Answer 16

Heat and temperature influences the refrigerants by changing it from a liquid into vapour

Question 17

When was R12 phased out?

Answer 17

Early 1990s

Question 18

What does CFC stand for?

Answer 18

Chloro
Fluoro
Carbons

Question 19

What does HCFC stand for?

Answer 19

Hydro
Chloro
Fluoro
Carbons

Question 20

What does RMS stand for?

Answer 20

Refrigerant management solution

Question 21

What does RMS do?

Answer 21

Recycles refrigerants

Question 22

What does dry brake fluid noil between?

Answer 22

230-270°c

Question 23

What does adaptive cruise control use?

Answer 23

Lidar, radar control

Question 24

What does TAD stand for?

Answer 24

Thrust axis deviation

Question 25

What is Steering axis inclination?

Answer 25

This is the angle formed by a line that runs through the upper and lower steering pivots when viewed from the front of the vehicle

Question 26

What is SAI?

Answer 26

A built-in non adjustable angle

Question 27

What are the different types of castor?

Answer 27

Positive- top of strut points towards rear of car Negative- top of strut points towards front of car

Question 28

What are the types of lubrication?

Answer 28

Boundary - where two meeting surfaces are unable to separate by oil film. Mixed Full film

Question 29

What is full film broken down into?

Answer 29

Hydro dynamic Elastohydro dynamic

Question 30

Oil filter purpose?

Answer 30

Removes contaminants

Question 31

What is the ackermann principle?

Answer 31

The ackermann allows the car to turn smoothly by having the inner tyre turn at a greater angle than the outer wheel when turning

Question 32

What are the types of catalysts?

Answer 32

Metal foil matrix Ceramic matrix

Question 33

What are the three types of metals previously used as the catalyst?

Answer 33

Platinum Palladium Rhodium