Deck 13: Repairing Plastics

Question 1

ASE-Style Multiple Choice All of the following are components of a plastic welder EXCEPT:

A)the welding rod
B)the preheat tube
C)the orifice
D)the gauge

Answer 1

D

Question 2

ASE-Style Multiple Choice ____ are used to make short welds to weld small holes and to weld in hard-to-reach places and sharp corners.

A)Round tips
B)Speed tips
C)Bolts
D)Tacking tips

Answer 2

A

Question 3

ASE-Style Multiple Choice On long tears where backup is difficult, small ____ can be made to hold the two sides in place before doing the permanent weld.

A)bolts
B)tack welds
C)strut rods
D)nuts

Answer 3

B

Question 4

ASE-Style Multiple Choice ____ are shaped to tack weld broken sections of plastic together before welding.

A)Tacking tips
B)Bolts
C)Thermoplastics
D)Backing strips

Question 5

All plastics can be welded.

Question 6

Airless plastic welding uses an electric heating element to melt a smaller 1-8-inch (3 mm)diameter rod with no external air supply.

Question 7

Two-part adhesive systems have not been accepted as an alternative to welding for many plastic repairs.

Question 8

One of the problems with hot-air welding is that the plastic welding rod is often thinner than the panel to be welded.

Question 9

When welding plastic, the welding rod must be compatible with the base material in order for the strength, hardness, and flexibility of the repair to be the same as the part.

Question 10

ASE-Style Multiple Choice ____ relies on high-frequency vibratory energy to produce plastic bonding without melting the base material.

A)Ultrasonic plastic welding
B)Drill welding
C)Thermosetting
D)Melt-flow plastic welding

Question 11

ASE-Style Multiple Choice ____ uses heat and sometimes a plastic filler rod to join or repair plastic parts.

A)Thermosetting
B)Plastic welding
C)Tacking
D)Bonding

Question 12

It is environmentally unsound to burn plastics.

Question 13

Handheld systems are available in 60 and 80 kHz frequencies.

Question 14

ASE-Style Multiple Choice All of the following are examples of plastic parts EXCEPT:

A)dollies
B)stone shields
C)bumpers
D)fender extensions

Question 15

ASE-Style Multiple Choice ____ are blends of different plastics and other ingredients designed to achieve specific performance characteristics.

A)Carcinogens
B)Frames
C)Sheet molded compounds
D)Composite plastics

Question 16

ASE-Style Multiple Choice ____ hold, feed, and automatically preheat the plastic welding rod.

A)Round tips
B)Speed tips
C)Bolts
D)Tacking tips

Question 17

Two-part adhesive systems consist of a base resin and a hardener (catalyst).

Question 18

A reliable means of identifying an unknown plastic is to make a weld rod adhesion test or a trial-and-error weld on a hidden or damaged area of the part.

Question 19

Adhesives are usually used for repairing minor cuts and cracks in plastic parts.

Question 20

ASE-Style Multiple Choice ____ uses a tool with an electric heating element to produce hot air (450 ° to 650 ° F or 232 ° to 345 ° C)that blows through a nozzle and onto the plastic.

A)Ultrasonic welding
B)Melt-flow plastic welding
C)Hot-air plastic welding
D)Drill welding

Question 21

ASE-Style Multiple Choice ____ uses a specially designed tip to produce a more uniform weld at a higher rate of speed.

A)Tailgate lining
B)Work hardening
C)Spooning
D)Plastic speed welding

Question 22

______________________________ undergo a chemical change by the action of heating, a catalyst, or ultraviolet light.

Question 23

ASE-Style Multiple Choice ____ are used when the part cannot be removed from the vehicle.

A)Single-sided plastic welds
B)Flame cones
C)Sheet metal
D)Ground clamps

Question 24

ASE-Style Multiple Choice Which of the following is LEAST-Likely a type of reinforced plastic?

A)Fiber-reinforced plastic
B)Sheet-molded compound
C)Vinyl
D)Reinforced reaction injection-molded polyurethane

Question 25

ASE-Style Multiple Choice The term MOST-Likely used to describe surface damage that does not penetrate or fracture the back of the panel is:

A)cosmetic damage
B)single-sided damage
C)exterior damage
D)structural damage

Question 26

____________________ are often used as a filler or to tack parts together before applying the final repair material.

Question 27

ASE-Style Multiple Choice While having a discussion, Technician A says that there are two methods of separating door pieces: heat and a claw hammer. Technician B says that the methods involve the use of: heat and a putty knife or an air chisel. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 28

____________________ can be repeatedly softened and reshaped by heating, with no change in their chemical makeup.

Question 29

Briefly describe the basic procedure when conducting plastic welding.

Question 30

ASE-Style Multiple Choice The term MOST-Likely used to describe a soft, flexible, thin plastic material often applied over a foam filler is:

A)vinyl
B)dolly
C)backing strip
D)molded core

Question 31

ASE-Style Multiple Choice ____ is an airless welding method and can be utilized for both single-sided and two-sided repairs.

A)Metal-flow plastic welding
B)Plastic speed welding
C)Melt-flow plastic welding
D)Plastic stitch-stamp welding

Question 32

Airless welding with a smaller rod helps eliminate two troublesome problems: panel warpage and ______________________________.

Question 33

Briefly describe the tack weld process.

Question 34

What factors should you bear in mind when conducting a plastic welding procedure?

Question 35

What factors should you bear in mind when using plastic repair adhesives?

Question 36

ASE-Style Multiple Choice While having a discussion, Technician A says that the cure time of some adhesives used in reinforced plastic repair can be shortened with the application of heat. Technician B says that temperature and humidity can affect work life and cure time. Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 37

A(n)_________________________ is a chemical that treats the surface of the plastic so the repair material will bond properly.

Question 38

ASE-Style Multiple Choice Which of the following is LEAST-Likely one of the steps in making a fiberglass core?

A)Place pieces of fiberglass veil over the waxed or waxed paper surface.
B)Apply resin-hardener to the veil material.
C)Remove the mold core from the model.
D)Weld the core piece in place.

Question 39

What test would your perform to determine whether plastic will require an adhesion promoter?

Question 40

ASE-Style Multiple Choice A ____ is bonded to the back of the repair area to restore the reinforced plastic's strength.

A)drill pad
B)molded core
C)backing strip
D)bolt