C-2 Portable Power Tools

Question 1

Powder-actuated tools

Answer 1

use gunpowder to fire a fastener int either lumber or wood

Question 2

Low - Velocity powder actuated tool

Answer 2

contains a “captive piston” meaning when the cartridge is fired, the force of the explosion acts first on the piston then fires the fastener to drive into meterial

Question 3

safety features of LV tools

Answer 3

• captive piston
• built in device that prevents device from firing
• two distinct sequential actions required before tool can be fired
• method for verifying the power level

Question 4

High Velocity tools

Answer 4

Direct acting tools they have no pistons and the fastening pins travel at speeds of 150-460 feet per second

Question 5

Methods of Propulsion

Answer 5

• impact
• contact
• co-acting

Question 6

Impact

type of fastener

Answer 6

gap between piston and fastener. fastener is against the work surface. tool is fired and piston travels down barrel to strike fastener

Question 7

Contact

Answer 7

piston is in contact with fastener which then is in contact with work serface

Question 8

co- acting

Answer 8

piston and fastener are not in contact with work surface

- piston and fastener reach certain speed before hitting work surface

Question 9

Threaded

Answer 9

Bolting an object after a fastener has been driven

Question 10

headed

Answer 10

for fastening an object to concrete or steel

Question 11

eyelet

Answer 11

for holding lightweight objects such as suspended ceiling

Question 12

Center Punch test

Answer 12

used to determine if a material is suitable for fastening with a powder actuated fastener.
try and punch fastener into material should make distinct dent

Question 13

Minimum thickness of concrete for fastner

Answer 13

must be three times the penetration of fastener

• must be 75mm from edge of concrete
• do not fasten on joints
• spaced more then 3 inches

Question 14

Spalling

Answer 14

when fastener blows out bits of concrete from point of entry

Question 15

how to prevent spalling

Answer 15

use washer

• reduce shank diameter of fastener
• reduce shank length of fastener
• reduce cartridge strength

Question 16

things to consider when fastening to steel

Answer 16

• must be at least 50mm or (2”) away from weld or joint
• must be at least 13mm (1/2”) away from edge of steel
• fasteners should be installed 1 inch apart

Question 17

Gas Powered chainsaw

Answer 17

• most common
• portable
  disadvantages is fumes

Question 18

Electric powered Chainsaw

Answer 18

sometimes used in enclosed spaces where fumes are to hazardous. not as powerful as gas saws

Question 19

Battery powered chainsaw

Answer 19

• use large rechargeable batteries 40v

- can be used when no electric power is available

Question 20

Pneumatic chainsaw

Answer 20

air driven chainsaw that requires an air compressor. common in bridgework

Question 21

Components of chainsaw

Answer 21

starter
throttle lockout 
throttle
fueltank
chain oil tank
bucking spike
chain brake

Question 22

Kickback

Answer 22

occurs when rotating chain momentarily hangs up on an obstruction and throws saw back on user

Question 23

Chain cuts

Answer 23

chain still spins after finger is let off throttle keep eyes peeled and stay vigilant

Question 24

Hammer Drill

Answer 24

mechanical action makes the bit vibrate into the concrete

Question 25

Rotary hammer

Answer 25

delivered by a piston-like device, delivers blow ten times harder then hammer drill

Question 26

Bull Point bit

Answer 26

has sharp point fro breaking up concrete

Question 27

Chisel bit

Answer 27

for breaking up concrete and other hard materials

Question 28

scaling or wide chisel bit

Answer 28

has wider blade then chisel bit

Question 29

digger bit

Answer 29

slightly wider bit used to dig or trench

Question 30

asphalt cutter

Answer 30

used win demo hammer when removing asphalt | - operator can make long straight cuts

Question 31

tamping bit

Answer 31

can pack down soil or loose gravel

Question 32

Handheld saw

Answer 32

saw is brought to the material and held by hand

Question 33

bench top saw

Answer 33

saw is mounted on surface

Question 34

walk behind saw

Answer 34

operator steers the saw while walking

Question 35

Abrasive disks

Answer 35

for handheld concrete or metal cutting disks

Question 36

sub abrasive disks

Answer 36

use diamond impregnated metal blades or cubic boron nitride blades. used to cut tile, stone, asphalt, concrete

Question 37

angle grinder

Answer 37

used to smooth concrete surfaces and to cut off exposed steel

Question 38

types of metal grinding wheels

Answer 38

ferrous metal wheels (cast- iron, steel) non ferrous metal wheels ( brass, copper, aluminum) cutt off wheels (zipdisks)

Question 39

size of router

Answer 39

two factors ( horsepower of the motor and the maximum shank diameter

Question 40

Collet nut

Answer 40

holds the bit securely to the router

Question 41

guid bearing router

Answer 41

many bits equipped with bearings that guid bit a certain distance from material.

Question 42

straight flute bit

Answer 42

cuts plow or dado in wood

Question 43

Laminate bit

Answer 43

used to trim finished edge of laminate counter tops can also be used of edges of wood

Question 44

Chamfer bit

Answer 44

buts a 45 degree bevel on edge of board

Question 45

Bullnose bit (Router)

Answer 45

used to round the edge of boards and trim

Question 46

Ogee bit

Answer 46

ogee bit is used to put an ogee on the edge of a board ogee shape curves one way and then the other

Question 47

dovetail bit

Answer 47

using a jig can make a decretive and strong dovetail joint

Question 48

cove bit

Answer 48

used to but cove (inside curve)

Question 49

Router bit speed

Answer 49

``` Bit Diameter Max Router speed up to 25mm -> 24000 rpm 25-32mm -> 18000 rpm 32-57mm - > 16000 rpm 57 - 89mm -> 12000 rpm ```

Question 50

templates

Answer 50

used with routers to cut specific holes

Question 51

guide bushings

Answer 51

when using a guide bushing the gap between the router and the outside edge of bushing must be considered when making the template

Question 52

Belt sanders

Answer 52

used to smooth faces of wood. measured by the width of of sander.

Question 53

Disk sanders

Answer 53

- used for shaping curved surfaces - or sanding edges of wood - remove old finish -

Question 54

orbital sander

Answer 54

- (palm sanders) orbit around 14000 rpm - use standard sand paper -

Question 55

multi master

Answer 55

use triangular sanding pad | can reach into tight corners

Question 56

sandpaper

Answer 56

three different grits are used when sanding woods course: 30-50 medium grit : 60-100 fine grit: 120-180

Question 57

Portable biscuit (plate) joiners

Answer 57

used when building cabinets shelving or furniture

Question 58

biscuit adjustment size

Answer 58

the depth of the saw kerf is reduced for the smaller biscuits and increased for larger

Question 59

double biscuit

Answer 59

can be created when working with wood that is at least 1" thick should be at least 3/16 between material and biscuit