C2 - Use Portable Tools LT #1 Powder-actuated tool

Question 1

What is the most widely used tool in the construction industry?

Answer 1

Low-Velocity

Question 2

Speed of fastener and driving piston for Low Velocity?

Answer 2

Less than 100 meters per second

Question 3

What is the function of a captive piston?

Answer 3

when a cartridge is fired, the force of the explosion acts first on the piston, which then acts on the fastener and drives it into the material

Question 4

How fast does a fastening pin in a medium-velocity fastener travel?

Answer 4

100 to 150 m per seconds

Question 5

Does a high velocity fastener have a piston?

Answer 5

No

Question 6

What speeds does a fastening pin discharge in a high-velocity fastener?

Answer 6

150 m/s or even 460 m/s

Question 7

Describe the impact method of propulsion

Answer 7

The gap between piston and fastener, tool is fired, piston travels down the barrel to strike the fastener like a hammer

Question 8

Describe the contact method of propulsion (Fastener)

Answer 8

The piston is in contact with the fastener which is in turn contact with the work surface

Question 9

Describe the co-acting method of propulsion (Fastener)

Answer 9

The piston and the fastener are not in contact with the work surface, the piston and fastener reach considerable speed before the fastener strikes the work surface, penetrating more deeply

Question 10

When selecting a cartridge (fastener) which should you start with?

Answer 10

Start with the weakest, work your way up in strength until fastening begins to work properly

Question 11

What is a threaded fastener for?

Answer 11

for bolting an object after a fastener has been driven

Question 12

What is a headed fastener for?

Answer 12

For fastening an object directly to concrete or steel

Question 13

What is an eye fastener for?

Answer 13

Holding wire attachments or other lightweight loads such as suspended ceilings

Question 14

Describe holding action (holding ability of a fastener)

Answer 14

On penetration, the fastener displaces and compresses the material, the material then tries to return to its original form and that effort squeezes the fastener

Question 15

What is acceptable in a center punch test?

Answer 15

If the fastener makes a distinct dint in the material, the material is acceptable for fastening

Question 16

Fastening concrete and concrete blocks requires:

Answer 16

1) Minimum thickness of concrete into which a fastener can be set must be three times the penetration of the fastener, but at no time may the concrete be less than 75 mm (3”) thick

2) Fastening must be 75 mm from concrete edge

3) Fastening to a concrete block, fasten into the web, not the hollow

4) Do not fasten into horizontal block, fasten into the web

5) Fastenings must be sent only into the horizontal or vertical mortar joints

6) Fastenings should be spaced no closer than 75 mm (3”)

Question 17

At what speed does the fastener move in a low-Velo, powder-actuated tool?

Answer 17

Less than 100 m / second

Question 18

What component does a low-velocity tool have that is not found in a high-velocity tool?

Answer 18

A piston

Question 19

Name three safety features of a low-value, powder-actuated tool.

Answer 19

1) Captive piston
2) tilt fire safety
3) requires 2 distinct action
4) has a built-in stopping mechanism

Question 20

When this tool is fired, the piston travels down the barrel to strike the fastener like a hammer, name the type of propulsuion used.

Answer 20

Impact method

Question 21

List the six load colors and power level numbers of cartridges with brass cases. Start with the weakest load and power level and proceed to the strongest

Answer 21

1 - Grey
2 - Brown
3 - green
4 - Yellow
5 - Red
6 - Purple

Question 22

Cartridges are available in two metal types

Answer 22

Brass (low velocity)
Nickel (high velocity)

Question 23

When selecting a cartridge for fastening with a low-velocity tool, what power level must you start with?

Answer 23

Weakest

Question 24

When selecting a cartridge for fastening, with low-velocity tool, what power level must you start with?

Answer 24

Weakest

Question 25

Name two ways powder-actuated cartridges are fired

Answer 25

1. Rim-fired
2. Centre-fired

Question 26

List three rules for loading a fastener into a powder-actuated tool

Answer 26

1) Piston must watch the fastener
2) Fastener washer guide must snugly fit
3) Proper cartridge for the tool must be used

Question 27

What are the two purposes of the plastic or metal guide around the fastener?

Answer 27

They hold the fastener in the fastener guide and keep them straight when fired

Question 28

You are attempting to fasten a soft material to concrete. You discover that the fastener is penetrating the material too deeply. What should you use to decrease penetration?

Answer 28

A washer

Question 29

What is the minimum thickness of steel for accepting a powder-actuated fastener?

Answer 29

5 mm (1/4”)

Question 30

How much penetration should there be when setting a fastener into steel?

Answer 30

Protrude through the material by 5 mm

Question 31

What’s the minimum distance from a torch cut or a weld a fastener can be placed?

Answer 31

50 mm (2”)

Question 32

What minimum thickness of concrete for fastening with a powder-actuated tool?

Answer 32

The minimum thickness of concrete into which a fastener can be set must be 3 times the penetration of the fastener, but at no time may the concrete be less than 75 mm

Question 33

Does high velocity powder-actuated tool have a piston?

Answer 33

NO

Question 34

What are the types of cartridges from weakest to strongest?

Answer 34

Brass (low velo)
Nickel (high velo)
1) Grey
2) Brown
3) Green
4) Yellow
5) Red
6) Purple

Question 35

How to select the length of the fastener?

Answer 35

Think of the material and the amount of penetration EX 65 mm is needed to penetrate 89 mm member into concrete

Question 36

When fastening soft material what must you do?

Answer 36

You need to use an additional washer to prevent shearing the stop ring and damaging the base plate of the tool

Question 37

Before fastening to steel:

Answer 37

Use a centre punch