Automotive Collision And Refinishing

Question 1

How can the pressure drop on an air line be minimized

• coiling the hose
• increase hose length
• increase hose diameter
• decrease hose diameter

Answer 1

Increase hose diameter

Question 2

How is air pressure measured

• horse power
• pounds per square inch
• revolution per minute
• cubic feet per minute

Answer 2

Pound per square inch

Question 3

What is the hose purpose of air intake filters?

• To lower the noise level of the compressor
• Prevent moisture from entering the storage tank
• to remove moisture and oil from the air
• stop dirt particles from entering the cylinders

Answer 3

Stop dirt particles from entering the cylinders

Question 4

What size air line is required forHVLP spray equipment to operate efficiently

• 6mm 1/4”
• 8mm 5/6”
• 10m 3/8”
• 25mm 1”

Answer 4

10mm 3/8

Question 5

Which component of the air delivery system uses silica desiccant beads to remove moisture

• Air lubricator
• Air drain leg
• air regulator
• air condenser

Answer 5

Air condenser

Question 6

Which compression r maintenance operation should be performed daily?

• drain storage tank
• change crankcase oil
• tight belts
• clean air filter

Answer 6

Drain storage tank

Question 7

Which one f the following best describes a diaphragm compressor

• Available in single stage and two stage
• produces a high volume of compressed air
• designed to run an air brush or touch up gun
• creates an oil problem during refinishing

Answer 7

Designed to run air brush or touch up gun

Question 8

Which of the following is NOT a type of compressor

• Piston type
• Diaphragm type
• Transformer type
• rotary screw type

Answer 8

Transformer type

Question 9

Which of the following is rating for the volume of air a compressor can produce

• HP
• PSI
• RPM
• CFM

Answer 9

Cfm

Question 10

All are basic components of a gravity feed spray gun EXCEPT:

fluid control knob
Fan adjustment knob
Fluid cap
Fluid needle

Answer 10

Fluid cap

Question 11

What components are matched to each other as a set?

Air adjusting valve and fan adjustment knob

Air cap and fluid needle

Fluid nozzle and air cap

Fluid needle and fluid nozzle

Answer 11

Fluid needle and fluid nozzle

Question 12

All are required when setting up a spray gun for use EXCEPT

• adjust the spray pattern
• adjust to the recommended air pressure
• adjust for temperature and humidity
• adjust the fluid control

Answer 12

Adjust for temperature and humidity

Question 13

When the spray gun trigger is partially compressed

• It releases on compressed air
• It release small amounts of compressed air and fluid
• it release only fluid
• there is no flow of air or fluid

Answer 13

It releases on compressed air

Question 14

What is used to adjust the air entering the spray gun to the recommended pressure?

Trigger
Air adjusting valve
Fan adjustment knob
Fluid control knob

Answer 14

Air adjusting valve

Question 15

What part of the air. So creates a vacuum to pull refinished materials into the air stream?

Auxiliary holes
Side holes
Centre hole
Air horns

Answer 15

Centre hole

Question 16

What is not a type of spray gun

Pressure feed
Gravity Feed
Force Feed
Siphon feed

Answer 16

Force feed

Question 17

What is the first valve to open when trigger is depressed?

Fluid valve
Regulator valve
Air valve
Spreader valve

Answer 17

Air valve

Question 18

What type of spray equipment uses a pot instead of a cup

Pressure feed
Gravity feed
Siphon feed
Force feed

Answer 18

Pressure fed

Question 19

What type of spray gun uses natural force to aid fluid flow?

Siphon feed
Gravity feed
Force feed
Pressure feed

Answer 19

Gravity feed

Question 20

Prior to cleaning a spray gun

• Wear an organic vapour charcoal respirator
• wear safety glasses and a face shield
• ensure the are no potential ignition source
• all the above

Answer 20

All the above

Question 21

All describe transfer efficiency EXCEPT:

• can affect the number of coats of refinish material that are required to obtain coverage
• HVLP, LVLP, and RP spray guns have high transfer efficiency
• the amount of refinish material a spray can deposit on a surface
• is considered high transfer efficiency when a spray gun is able to obtain 20-40%

Answer 21

Is considered high transfer efficiency when a spray gun is able to obtain 20-40%

Question 22

Tech A says the size of a spray guns fitting and air passages have no effect on transfer efficiency EXCEPT

Tech B says spray technique and the type of materials being used can effect transfer efficiency

A
B
Both
Neither

Answer 22

B

Question 23

What describes the proper preparation for cleaning a spray gun

• wear an organic vapour charcoal respirator
• wear safety glasses and a face shield
• ensure there are no potential ignition source
• all the above

Answer 23

All the above

Question 24

All can be used when cleaning spray gun components EXCEPT

• plastic or wooden tooth picks
• Plastic bristle brushes
• Specific tools provided by the spray gun maker
• welding tip cleaner

Answer 24

Welding tip cleaner

Question 25

Tech A says a spray gun should be immersed to soak in a bath of solvent to remove dried material Tech B says only air tool oil can be used to lubricate moving parts of spray gun. A B Both Neither

Answer 25

Both

Question 26

The air pressure at the cap for an HVLP spray gun is 6psi 10psi 15psi 20psi

Answer 26

10psi

Question 27

Tech A says the air pressure at a spray gun air cap should be the same as the pressure at the inlet Tech B says an air regulator restricts airflow and creates an unstable air pressure and air volume A B Both Neither

Answer 27

Neither

Question 28

All are adjustments that can effect a spray pattern EXCEPT - fan width adjustment - Fluid control adjustment - Air pressure adjustment - Spray pattern should be parallel to the work surface

Answer 28

Spray pattern should be parallel to the work surface

Question 29

Caused by material that has dried around the outside of the air cap

Answer 29

A spray pattern that is depositing heavy on the top or the bottom

Question 30

A desired spray pattern

Answer 30

A spray pattern that is slender, vertical oval with even coverage

Question 31

Caused by atomizing air pressure that is too high for the viscosity of the material being sprayed

Answer 31

A spray pattern that is shaped like a figure 8

Question 32

Caused by a restricted air passage in the air cap ear

Answer 32

A spray pattern that is crescent shaped

Question 33

How should a tech body be positioned when spraying - 15-25cm / 6-10” away from the surface being painted - one arm length away from the surface being painted - adjacent to the surface being painted - 1-1.5 meters away from the surface being painted

Answer 33

One arm length away from the surface being painted

Question 34

How should inside corner be sprayed Aim directly at the centre One stroke down each side first Spray inside corner last From farther away a large spray pattern

Answer 34

Aim directly at the centre

Question 35

Tech A says a dry, rough finish can be caused by spraying too close to the panel or by moving to fast Tech B says overlapping is done to ensure complete coverage and hiding of the material being sprayed A B Both Neither

Answer 35

B