56months Flashcards
High speed low cost method of forming intricate parts is called
Injection molding
In laminar flow the fluid moves in layers___to the pipe
Parallel
Plastics that can be reheated and re-shaped many times are called space___
Thermoplastics
Filament winding Consist of winding a continuous strand of resin coated glass fiber around a special form called a _________
Mandrel
When patching clean both sides of the material with___ To remove oil’s and dirt
Solvent
Elastomers have the ability to be stretched to at least twice their original link and then return rapidly to _____
Their original shape
Chemicals called____reduce deterioration caused by oxidation
Antioxidants
This class of rubber resist damage by extreme high and low temperatures
R?
S?
T?
T
Most rubber compounds can be ______
Burned
Measurements of wood called_____feet referred to the actual length of the board
Running
Lumber is normally sold by the___foot
Board
Knows are _____ points in wood
Weak
In softwoods the pilot hole should only be ______ as deep is the length of the screw
Have
Type N is a _____ strength Mortar used for expose masonry above ground level and for chimneys and exterior wall subject to severe exposure it is also used for exposed and____-bearing clay tiles construction
Medium
Load
In small patching jobs,______ of _______is used because it sets very quickly
Plaster of Paris
To determine correct glass size for a window pane, measure the sash and deduct ______ “ to ______”
1/16” to 1/8”
An asphalt coating serves as a ________ _____ On the outside of underground or basement walls
Moisture barrier
The liquid part of a paint is called the______because it binds the pigment particles into a uniform film
Vehicle
The single most important factor for success in applying a protective coating is?
Surface preparation
______ ________ Clean the service to the bare metal. It completely removes all scale and corrosion and creates the best anchor pattern
White blasting
In ________ And Oxsee acetylene flame melts the zinc and sprays it onto the subtrate
Metalizing
________ acid Is used for removing hard water deposits in heating and cooling systems
Sulfamic
_________ lubricants Are used in aircraft engines or high-pressure steam turbines because they offer more heat and fire resistance than petroleum based oils
Synthetic
___________ Prevent scale and piping systems and boilers
Sequestriants
For fighting class C chemical is for what type of fire?
Live electrical equipment and wiring
Water soluble gums and starches from plants are made into natural vegetable Glues called
Mucilage
The highest strength adhesive type joint is called the ________-_______ joint
Bevel-Lap
High temperature tape’s Coated with flouro-carbon or silicone adhesives ar used where service conditions include ________ temperatures
High
________ Is an excellent insulator of electricity
Rubber/Vinyl
