Intro to Collision Repair Midterm

What do the sections mean on an NFPA square?

Sections are measured from 0-4, blue is health risk, red is flammability risk, yellow is reactivity risk, and white indicates specific hazards.

How long can hazardous waste accumulate for?

Max 180 days for a distance less than 200 miles, max 270 days for 200 miles or more.

What acronym should be present on the side of all eye protection?

ANSI Z87

When should you wear neoprene gloves?

When handling corrosive materials.

When should you use Nitrile gloves?

While working with chemicals.

When should you wear lineman/s gloves?

When working on high voltage equipment.

When should you wear kevlar gloves?

While handling sharp objects like glass or metal sheets.

Head Sock

Covers the scalp and hair to protect against hazardous materials. Worn with half face air-purifying respirators.

Dust Mask

Not NIOSH approved as a filtering face piece, should not be worn in a collision repair facility because it does not filter gas or vapor.

Filtering Facepiece Respirator (FFR)

Half face piece that filters out dust or mists and is disposable.

Elastomeric Half-face piece Respirator

Reusable for filtering out gases, vapors and particles with a filter, cartridge or both. Has three filter levels, N is not resistant to oil, R is resistant to oil, P is oil proof. Three efficiency levels: 95, 99, 100.

Elastomeric Full-Face piece Respirator

Covers from the hairline to below the chin. Filters gases, vapors and particles. N, R, P filters with 95, 99, and 100 efficiency levels.

Powered Air-Purifying Respirator

Uses a battery powered fan to deliver air to helmets and hoods. Covers the head and requires fit testing for the tighter fitting version.

Particulate Filters

Captures contaminants like dust, mist, and droplets and has three efficiency levels. 95 removes 95% of particulates, 99 removes 99% of particulates, 100 removes 99.97% of particulates.

Absorbent Cartridges

Uses activated carbon or oxidized charcoal media. Protects against toxic gases, volatile organic compounds (VOCs), plus other vapors. Absorbs gases and vapors in the carbon or charcoal.

Filters and Cartridges

Used together to protect against particulates and gases. Allows the filter to trap particulates and the cartridge to absorb gases and vapors. Removes both types of contaminants from the incoming air.

Permissable Exposure Limits (PEL)

PELs define the maximum amount or concentration of substance in the air. Wear APRs when a product’s PEL is exceeded. Limit is based on an average of 8 hours.

NIOSH

National Institute for Occupational Safety and Health

What APR should be used during Refinishing?

A powered APR

What category of particulate filter would you use while working with oil for 3 hours?

R (Oil-resistant up to 8 hours)

When should you change a cartridge?

If it is past expiration date, if the contaminant can be detected by smell or taste, or 6 months after opening

Cartridges

Black is for organic vapors, purple or pink are for particulates, yellow is for a combination of acid gases and organic vapors.

What are VOCs?

Volatile Organic Compounds are carbon based compounds that evaporate when exposed to air and emit potentially dangerous gases.

Chlorofluorocarbons (CFCs)

CFCs are chemicals made up of carbon, chlorine, and fluorine. They are found in aerosol sprays, foams and packing material, solvents, and refrigerants. They deplete the ozone layer and have been outlawed by 197 countries.

National VOC Rule

Sets emission standards for automobile refinish coatings.

First character in a VIN

Identifies the country where the vehicle was built

2nd character in a VIN

Identifies the vehicle maker

3rd character in a VIN

The vehicle type or manufacturing division

Characters 4-8 in a VIN

Describe the vehicle model, body type, restraint system, engine size, and transmission type.

9th Character in a VIN

The check digit used to detect invalid VINS

10th character in a VIN

Identifies the year built.

11th character in a VIN

Identifies the assembly plant.

Characters 12-17 in a VIN

The vehicle serial number

Tire Infromation Labels provide:

Tire size, inflation pressure, and maximum vehicle load.

Lead Acid Batteries

Include a lead alloy flooded or immersed in an electrolyte, mainly handles starting, lighting, and ignition-SLI.

How often should a low-maintenance battery be serviced?

Electrolyte levels should be checked once per year.

Absorbent Glass Mat Battery (AGM)

Sealed and requires no maintenance- powers cars with high energy consumption and numerous electrical systems.

Three Minute Charge Test

If the voltage is above 15.5 volts during the three minutes, the battery is faulty.

Charging a Battery

Connect the POSITIVE cable to the positive terminal, then the negative cable. Remove cables backwards from how you put them on- Negative removed first.

Piston compressors

Work like internal combustion engines. Single stage has pressure up to 125 psi, two-stage has pressure up to 200 psi. 60% duty cycle and compressed air is stored in reserve tank.

Rotary Screw Compressors

Operate using two machine-matched screws rotating together to force air into a holding tank. 100% duty cycle, quieter and half the temperature of piston-compressed air.

Rotary Vane Compressors

Positive displacement pumps, consist of vanes mounted to a rotor. The rotor is positioned off-center within cylindrical housing. Used in large facilities with greater compressed air requirements.

Moisture Removal Systems

Air Dryers reduce moisture from the compressed air system. Refrigerant systems lower the temp of the compressed air to remove moisture, aftercoolers reduce the temp of compressed air and remove up to 70% of moisture.

How much weight should a jack stand be able to support?

Jack stands should support at least half of the vehicles weight.

Wet Dust Extraction Systems

Used for aluminum repairs, filters out dust with a spray of water.

Aluminum Dust

A flammable solid that is very light and remains in the air. Use dust extraction equipment, do not dry sweep.

Pneumatic Sanders

Require consistent air pressure and need more maintenance than electric or cordless sanders. Can be used with wet sanding.

Electric Sanders

Require little maintenance and cannot be used with wet sanding.

Finish Defect Sanders

Used for sanding small defects, compatible with wet sanding.

Straight Line Sanders

Used on large flat surfaces for leveling and smoothing.

Dual Action Sander

Has a forced rotation that drives the rotating motion and orbiting motion. The sandpaper moves forward, backward, and in a rotary motion.

8-Inch Rotary Sander

Uses an eight or nine inch pad and is not dual action. May have a vacuum-ready attachment.

Spindle Lock

Some dual action sanders have a spindle lock that allows you to lock the shaft, make the sander spin like a grinder, and use for aggressive sanding.