Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

NS Millwright Block 1 > Portable Power and Air Tools, and Explosive Actuated Tools > Flashcards

Portable Power and Air Tools, and Explosive Actuated Tools Flashcards

1
Q

When using a power tool when should you use a ground fault interrupter circuit (GFCI)?

A

When there is possibility of damage to your extension chord or when using the tool in damp locations.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where should the guard be positioned on a handheld grinder?

A

Between the grinding disc and the operator to protect against sparks and fragments.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How are hammer drill bits or concrete and masonry drill bits different from regular drill bits?

A

They have a carbide tip that is strong enough to take the scraping and hammering action of the drill.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Is it safe to carry a portable grinder by the power chord?

A

No.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Is it safe to use standard sockets with electric impact wrenches?

A

No.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

If a power drill is larger does it operate at lower rpms and higher torque?

A

Yes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Can you use conventional drills with a hammer drill?

A

Yes, as long as you can switch off the hammer action.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Do most cordless drills have torque control?

A

Yes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Does prolonged use of power or air tools cause carpal tunnel syndrome?

A

Yes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Is it safe to run an impact wrench with a universal joint and socket attached?

A

No, because it may throw the attachments off.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In an explosive actuated tool, what is the power load?

A

The loaded cartridge. It provides the energy to drive the fastener.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

A power load with a crimped end should only be used in what velocity of tool?

A

Low velocity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How is power load strength identified?

A

A numbering system form 1 to 6 indicates power, with 1 being the weakest.
The colour of the box, and on the end of the load, also indicates power load.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why should fasteners or other metal objects not be carried in the same pocket as power loads?

A

They may set off, causing serious injury or death.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why is adequate ventilation required when operating explosive actuated tools?

A

To prevent the ingestion of lead.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the most common fastener for most practices?

A

Drive pins.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What type of fastener is comprised of a shank that is driven into the base material and a threaded portion to which an object can be attached with a washer and nut?

A

Threaded studs.

18
Q

Why must you never overtighten a nut on a threaded stud?

A

It could pull out the stud.

19
Q

What type of fastener is used to mount a bracket, fixture or clip?

A

Drive pin assemblies.

20
Q

By what dimension are light and heavy duty fasteners categorized?

A

The diameter of the shank.
Under 3/16-inch is light duty.
Over 3/16-inch is heavy duty.

21
Q

What are unsuitable types of base materials for driving explosive fasteners into?

A
  1. Hard - can deflect off.
  2. Brittle - cracks or shatters.
  3. Soft - passes completely through.
22
Q

How does using the fastener as a center punch allow you to test the material for hardness?

A

If the fastener becomes blunted than the material is too hard. If not, carry on with testing brittleness and softness.

23
Q

To determine the suitability of a base material, use a fastener as a center punch struck by a single hammer blow. If the material cracks or shatters, should you fasten to the material?

A

No, the material is too brittle.

24
Q

To determine the suitability of a base material, use a fastener as a center punch struck by a single hammer blow. If the fastener penetrates easily, should you fasten to the material?

A

No, the material is too soft.

25
Q

What is the correct depth for a properly set fastener?

A

The fastener should penetrate 6 to 8 times the diameter of the shank, but should only penetrate the base material to a depth of 1/3 the total material thickness.

26
Q

what can setting fasteners too close together or too close to the edge of the base material cause to happen.

A

Cracking.

27
Q

At what strength should concrete be before attempting to fasten into it?

A

65- to 75- percent of its design strength.

28
Q

What is spall?

A

Fracturing of the base material at the surface.

29
Q

What are two things that can be used to reduce spall?

A

Use a finishing disc or a spall reducing adaptor.

30
Q

Why should you not fasten into pre-cast concrete or pre-stressed concrete without approval from an engineer?

A

Fasteners may damage the steel cables within the concrete and failure may occur.

31
Q

What are the general spacing requirements for driving fasteners?

A

No closer than 3-inches (75 mm) from the edge of concrete.
No closer than 3-inches (75 mm) apart.

32
Q

When fastening to steel, how can the load strength be increased?

A

Use a knurled shank.

33
Q

Is a fastener set in thick steel members in which the point cannot completely penetrate still an acceptable fastening?

A

Yes, if the correct power load and fastener size are used.

34
Q

How deep through the steel should the fastener penetrate to get the maximum holding power?

A

1/4-inch (6 mm).

35
Q

Why should you not use a fastener with a shank longer than required when fastening to steel?

A

The burnishing effect of a long shank passing through the steel enlarges the hole, reducing holding power.

36
Q

What is the general recommendation for spacing when fastening to steel?

A

1/2-inch (15 mm) from the edge.
Spaced 2-inches (50 mm) apart.

37
Q

Can you fasten into areas that have been welded or cut by a torch?

A

No, the metal can be to hard for explosive actuated system fastening.

38
Q

Why should you avoid overdriving a fastener into steel?

A
  1. Excessive force can damage the fastener.
  2. Rebound of the fastener reduces its holding power.
  3. It reduces useful thread length.
39
Q

How is the explosive actuated tool cleaned?

A

Apply a slight film of solvent to all the parts, scour them with a wire brush to remove all traces of carbon, and wipe them dry with a cloth.

40
Q

How often should the explosive actuated tool be cleaned?

A

Every day after use.

41
Q

Should you use lubricant on the explosive actuated tool?

A

Do not use lubricant. It fouls the operation of the gun.

42
Q

How should explosive actuated tools be stored?

A

Unloaded and in a locked container.

NS Millwright Block 1 (23 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions