Automotive Collision And Refinishing Flashcards
How can the pressure drop on an air line be minimized
- coiling the hose
- increase hose length
- increase hose diameter
- decrease hose diameter
Increase hose diameter
How is air pressure measured
- horse power
- pounds per square inch
- revolution per minute
- cubic feet per minute
Pound per square inch
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
Stop dirt particles from entering the cylinders
What size air line is required forHVLP spray equipment to operate efficiently
- 6mm 1/4”
- 8mm 5/6”
- 10m 3/8”
- 25mm 1”
10mm 3/8
Which component of the air delivery system uses silica desiccant beads to remove moisture
- Air lubricator
- Air drain leg
- air regulator
- air condenser
Air condenser
Which compression r maintenance operation should be performed daily?
- drain storage tank
- change crankcase oil
- tight belts
- clean air filter
Drain storage tank
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
Designed to run air brush or touch up gun
Which of the following is NOT a type of compressor
- Piston type
- Diaphragm type
- Transformer type
- rotary screw type
Transformer type
Which of the following is rating for the volume of air a compressor can produce
- HP
- PSI
- RPM
- CFM
Cfm
All are basic components of a gravity feed spray gun EXCEPT:
fluid control knob
Fan adjustment knob
Fluid cap
Fluid needle
Fluid cap
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
Fluid needle and fluid nozzle
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
Adjust for temperature and humidity
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
It releases on compressed air
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
Air adjusting valve
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
Centre hole
What is not a type of spray gun
Pressure feed
Gravity Feed
Force Feed
Siphon feed
Force feed
What is the first valve to open when trigger is depressed?
Fluid valve
Regulator valve
Air valve
Spreader valve
Air valve
What type of spray equipment uses a pot instead of a cup
Pressure feed
Gravity feed
Siphon feed
Force feed
Pressure fed
What type of spray gun uses natural force to aid fluid flow?
Siphon feed
Gravity feed
Force feed
Pressure feed
Gravity feed
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
All the above
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%
Is considered high transfer efficiency when a spray gun is able to obtain 20-40%
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
B
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
All the above
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
Welding tip cleaner
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
Both
The air pressure at the cap for an HVLP spray gun is
6psi
10psi
15psi
20psi
10psi
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
Neither
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
Spray pattern should be parallel to the work surface
Caused by material that has dried around the outside of the air cap
A spray pattern that is depositing heavy on the top or the bottom
A desired spray pattern
A spray pattern that is slender, vertical oval with even coverage
Caused by atomizing air pressure that is too high for the viscosity of the material being sprayed
A spray pattern that is shaped like a figure 8
Caused by a restricted air passage in the air cap ear
A spray pattern that is crescent shaped
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
One arm length away from the surface being painted
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
Aim directly at the centre
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
B
