Exam 3 Flashcards
When blending use __% of book time.
50%
A booth with an air makeup system should have slightly _______ air pressure inside the booth than outside the booth.
Higher (positive)
______ ______ compressors operate on the principle of positive displacement.
Rotary Screw compressors
A ___-_____ compressor draws air and compresses it to final tank pressure in two stages.
Two-stage
A booth must be equipped with an exhaust fan capable of maintaining air movement of ____ linear feet per minute throughout the booth area.
100 linear feet
An ___ regulator _________, is a multi-purpose device that first filters and then regulates the compressed air.
Air regulator transformers
When blowing a vehicle off before paint use an air pressure of no more than __ psi
20 psi
An __________, sometimes referred to as a damage appraisal.
Estimate
The _____ compressor pump develops compressed air pressure through the action of a reciprocating piston.
Piston compressor
The _____ _____ design is run around the inside walls of the shop.
Full loop design
A rule-of thumb when calculating CFM is???
1HP= _ CFM
1HP=4CFM
The _________ will deal with various waste materials.
refinisher
What stage does the majority of atomization start?
Stage 2
An estimate is good for __ days
30
A standard automotive spray booth exhausts _____ to ______ cubic feet of air per minute
9000 to 12000 (255 to 340 cubic meters) of air per minute
.1 on an estimate = ?
6 mins
10th of an hour
A single-stage compressor is __% efficient
60%
Ignitable waste has a flash point of less than __ degrees C
60 degrees C
Before baking a vehicle, some coatings require __ to __ minutes for solvent to flash off or evaporate.
10-15 minutes
By definiton, ________ means to arrive at an often accurate, but usually approximate price for a job.
Estimate
One bar is equal to __._ psi
14.5psi
Paint solvents, hardeners and paint additives should .be stored in _____ storage cabinets in the paint mixing room.
Metal Storage
What are spray gun bodies made of?
Aluminum Alloy
Diaphragm compressors deliver only a small amount of air, __psi to __psi
30-50psi
Refinishing times include preparation which is typically __/__ or __/__ split with the prepper.
60/40
70/30
_________ compressors are usually small and portable, and are used where a low volume of air is needed.
Diaphragm
_________ ____ Dryers remove moisture, known as water vapor, from compressed air.
Refrigerated Air Dryers
Air intake filters must capture __ to __% of all particles 10 microns or larger.
80 to 90%
1 micron is equal to _/____ mm
1/1000 mm
Transformer regulators should be installed at least . meters of air line from the compressor efficient operation,
7.6 meters
A _________ is defined as any change to the original estimate.
Supplement
A two-stage compressor is typically __% efficient.
80%
The _________ ______ release valve allows the motor to start up and gain momentum before engaging the load, or pumping air against it.
Centrifugal Pressure release valve
Corrosive waste has a pH of less than _ or greater than __._
2
12.5
Refrigerated air dryers remove moisture from compressed air by cooling the air in a heat exchanger to approx __degrees C
10 degress C
_______ drops are caused by friction of the flowing air against the inner surfaces of air hoses and fittings.
Pressure drops
An estimate is a complete _________ of a vehicle
Blueprint
Measuring air pressure can be done with a pressure differential gauge called a _________ or a _________ pressure gauge.
Manometer or a magnehelic pressure gauge.
A compressor must be located at least ___ foot or more away from any wall or obstruction.
One foot
Hoses are measured by the _______ ______ and _____.
Inside diameter and length
When colour sanding use __% of book time.
30%
A paint mix room ventilation system has __ exchanges of air per hour
12
What RPM range does a circular polisher run at?
600 to 3000RPM
The ____ end design is run from the compressor to the far end of the shop, usually down the middle of the shop.
The Dead end design
The exhaust system should completely change the volume of air in the booth every __ to __ minutes,
20 to 30 minutes.
____ point is the temperature at which water vapour condenses from the air.
Dew Point
_________ have a shelf life of only __ months if unopened and as few as _ days when opened.
10 months
5 days
How far should a conventional gun be held away from the surface being sprayed?
8 to 10”
The wavelength is determined by the _________ of the source
temperature
The compressed air piping or ___ ________ systems carries air from the compressor storage tank to various locations in the shop.
Air distribution systems
A _____-_____ compressor draws air in and compresses it to final tank pressure in one stage.
Single-stage
Allow a maximum of . hours to clear coat on exterior panels only.
2.5 hours
Whats the transfer efficiency of a conventional gun?
25-30%
